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{{Short description|Surgical removal of the tonsils}}
A '''tonsillectomy''' is a [[list of surgical procedures|surgical procedure]], during which the [[tonsil]]s are removed. Sometimes the [[adenoid]]s are removed at the same time.
{{cs1 config|name-list-style=vanc}}
{{Use dmy dates|date=September 2019}}
{{Infobox medical intervention
| name = Tonsillectomy
| synonyms = Adenotonsillectomy, T&A
| image = Tonsillectomy09.jpg
| caption = Typical appearance of the back of the throat three days post tonsillectomy.
| ICD10 =
| ICD9 = {{ICD9proc|28.2}}-{{ICD9proc|28.3}}
| MeshID = D014068
| MedlinePlus = 003013
| OPS301 =
| OtherCodes =
}}
<!-- Definition and medical uses -->
'''Tonsillectomy''' is a [[list of surgical procedures|surgical procedure]] in which both [[palatine tonsil]]s are fully removed from the back of the [[throat]].<ref name=Oto2019>{{cite journal |last1=Mitchell |first1=Ron B. |last2=Archer |first2=Sanford M. |last3=Ishman |first3=Stacey L. |last4=Rosenfeld |first4=Richard M. |last5=Coles |first5=Sarah |last6=Finestone |first6=Sandra A. |last7=Friedman |first7=Norman R. |last8=Giordano |first8=Terri |last9=Hildrew |first9=Douglas M. |last10=Kim |first10=Tae W. |last11=Lloyd |first11=Robin M. |last12=Parikh |first12=Sanjay R. |last13=Shulman |first13=Stanford T. |last14=Walner |first14=David L. |last15=Walsh |first15=Sandra A. |last16=Nnacheta |first16=Lorraine C. |title=Clinical Practice Guideline: Tonsillectomy in Children (Update) |journal=Otolaryngology–Head and Neck Surgery |date=5 February 2019 |volume=160 |issue=1_suppl |pages=S1–S42 |doi=10.1177/0194599818801757|pmid=30798778 |doi-access=free }}</ref> The procedure is mainly performed for recurrent [[tonsillitis]], [[throat infections]] and [[obstructive sleep apnea]] (OSA).<ref name=Oto2019/> For those with frequent throat infections, surgery results in 0.6 (95% confidence interval: 1.0 to 0.1) fewer sore throats in the following year, but there is no evidence of long term benefits.<ref name=Oto2019/><!-- quote = tonsillectomy for recurrent throat infections in severely affected children was shown, in a randomized controlled trial, to reduce the frequency (one fewer sore throat) and severity of infections ()


We combined data from five trials in children; these trials included children who were 'severely aHected' (based on the specific 'Paradise'
Tonsillectomy may be indicated when the patient:
criteria) and less severely aHected. Children who had an adeno-/tonsillectomy had an average of three episodes of sore throats (of any
* Experiences frequent bouts of acute [[tonsillitis]]. The number indicating tonsillectomy varies with the severity of the episodes. One case, even severe, is generally not enough for most surgeons to decide tonsillectomy is indicated.
severity) in the first postoperative year, compared to 3.6 episodes in the control group; a diHerence of 0.6 episodes (95% confidence interval
* Has [[chronic tonsillitis]], consisting of persistent, moderate-to-severe throat pain.
(CI) -1 to -0.1; moderate quality evidence). One of the three episodes in the surgical group was the 'predictable' one that occurred in the
* Has multiple bouts of [[peritonsillar abscess]].
immediate postoperative period.
* Has [[sleep apnea]] (stopping or obstructing breathing at night due to enlarged tonsils or adenoids)
When we analysed only episodes of moderate/severe sore throat, children who had been more severely aHected and had adeno-/
* Difficulty eating or swallowing due to enlarged tonsils
tonsillectomy had on average 1.1 episodes of sore throat in the first postoperative year, compared with 1.2 episodes in the control group
* Is suspected of having [[cancer]].
(low quality evidence). This is not a significant diHerence but one episode in the surgical group was that occurring immediately aLer
surgery.


in the first year following surgery --><ref name=Burton2014>{{cite journal | vauthors = Burton MJ, Glasziou PP, Chong LY, Venekamp RP | title = Tonsillectomy or adenotonsillectomy versus non-surgical treatment for chronic/recurrent acute tonsillitis | journal = The Cochrane Database of Systematic Reviews | issue = 11 | pages = CD001802 | date = November 2014 | volume = 2014 | pmid = 25407135 | doi = 10.1002/14651858.CD001802.pub3| pmc = 7075105 |quote=Adeno-/tonsillectomy leads to a reduction in the number of episodes of sore throat and days with sore throat in children in the first year after surgery compared to (initial) non-surgical treatment. | url = https://pure.bond.edu.au/ws/files/32844113/Tonsillectomy_or_adenotonsillectomy_versus_non_surgical_treatment_for_chronic.pdf }}</ref> In children with OSA, it results in improved [[Quality of life (healthcare)|quality of life]].<ref name=Ven2015>{{cite journal | vauthors = Venekamp RP, Hearne BJ, Chandrasekharan D, Blackshaw H, Lim J, Schilder AG | title = Tonsillectomy or adenotonsillectomy versus non-surgical management for obstructive sleep-disordered breathing in children | journal = The Cochrane Database of Systematic Reviews | issue = 10 | pages = CD011165 | date = October 2015 | volume = 2015 | pmid = 26465274 | doi = 10.1002/14651858.CD011165.pub2 | pmc = 9242010 | url = http://dspace.library.uu.nl/bitstream/1874/335868/1/Venekamp.pdf }}</ref>
Most infections indicating tonsillectomy are a result of ''[[Streptococcus]]'' infection ("[[strep throat]]"), but some may be due to other [[bacillus|bacilli]], such as ''[[Staphylococcus]]'', or [[virus]]es. However, the [[etiology]] of the condition is largely irrelevant in determining whether tonsillectomy is indicated. [http://www.ivillage.com/topics/health/0,,232762,00.html]


<!-- Complications -->
Most tonsillectomies are performed on children, though many are also performed on teenagers and adults. There has been a significant reduction in the number of tonsillectomies in the United States from several millions in the 1970s to aproximately 600,000 in the late 1990s. This has been due in part to more stringent guidelines for tonsillectomy and adenoidectomy (see [[tonsillitis]] and [[adenoid]]). Still, debate about the usefulness of tonsillectomies continues. Not surprisingly, the otolaryngology literature is usually pro-tonsillectomy and the pediatrician literature is the opposing view. Enlarged tonsils are being removed more often among adults and children for sleep apnea (airway obstruction while sleeping), snoring, and upper airway obstruction. Children who have sleep apnea can do poorer at school, are tired and fatigued during the day, and have some links to ADHD. {{an|Avior}}{{an|Ray}}
While generally safe, complications may include [[bleeding]], [[vomiting]], [[dehydration]], trouble eating, and trouble talking.<ref name=Oto2019/> [[Sore throat|Throat pain]] typically lasts about one to two weeks after surgery.<ref name=Oto2019/><ref>{{cite book |last1=Flint |first1=Paul W. |last2=Haughey |first2=Bruce H. |last3=Robbins |first3=K. Thomas |last4=Thomas |first4=J. Regan |last5=Niparko |first5=John K. |last6=Lund |first6=Valerie J. |last7=Lesperance |first7=Marci M. |title=Cummings Otolaryngology – Head and Neck Surgery E-Book |date=2014 |publisher=Elsevier Health Sciences |isbn=9780323278201 |page=2862 |url=https://books.google.com/books?id=lFajBQAAQBAJ&pg=PA2862 |language=en}}</ref> Bleeding occurs in about 1% within the first day and another 2% after that.<ref name=Oto2019/> Between 1 in 2,360 and 1 in 56,000 procedures cause death.<ref name=Oto2019/> Tonsillectomy does not appear to affect long term [[Immune system|immune function]].<ref name=Oto2019/><!-- quote = Nevertheless, there are no studies to date that demonstrate a significant clinical impact of tonsillectomy on the immune system. --><ref name=Bit2015/>


<!-- Procedure -->
Tonsillectomy in adults is perhaps more painful than in children, though everyone's experience is different. Post-operative recovery may take 10-20 days, during which [[narcotic]] [[analgesic]]s are typically prescribed. A diet of soft food (e.g. [[pudding]], [[egg (food)|eggs]], soft [[noodles]], [[soup]], etc.) is recommended to minimize [[pain]] and the risk of bleeding; the duration of diet restriction varies from patient to patient and may last from several days to two weeks or more. Proper hydration is also very important during this time, since [[dehydration]] can increase throat pain, leading to a [[vicious cycle]] of poor fluid intake. At some point, most commonly 7-11 days after the surgery (but occasionally as long as two weeks after), bleeding may occur when [[scab | scabs]] begin sloughing off from the surgical sites. The overall risk of bleeding is approximately 1-2% higher in adults. {{an|Windfuhr}}
Following the surgery, [[ibuprofen]] and [[paracetamol]] (acetaminophen) may be used to treat postoperative pain.<ref name=Oto2019/> The surgery is often done using [[surgical instrument|metal instruments]] or [[electrocautery]].<ref name=Oto2019/><ref name=Dam2016>{{cite journal |last1=Damiani |first1=F |last2=Rada |first2=G |last3=Gana |first3=JC |last4=Brockmann |first4=PE |last5=Alberti |first5=G |title=Long-term effects of adenotonsillectomy in children with obstructive sleep apnoea: protocol for a systematic review. |journal=BMJ Open |date=2 September 2016 |volume=6 |issue=9 |pages=e010030 |doi=10.1136/bmjopen-2015-010030 |pmid=27591015|pmc=5020755 }}</ref> The [[adenoids|adenoid]] may also be removed or shaved down, in which case it is known as an "adenotonsillectomy".<ref name=Oto2019/> The partial removal of the tonsils is called a "tonsillotomy", which may be preferred in cases of OSA.<ref name=Oto2019/><ref>{{Cite journal|last1=Zhang|first1=Lai-Ying|last2=Zhong|first2=Laurie|last3=David|first3=Michael|last4=Cervin|first4=Anders|date=December 2017|title=Tonsillectomy or tonsillotomy? A systematic review for paediatric sleep-disordered breathing|journal=International Journal of Pediatric Otorhinolaryngology|language=en|volume=103|pages=41–50|doi=10.1016/j.ijporl.2017.10.008|pmid=29224763}}</ref><ref>{{Cite journal|last1=Gorman|first1=D.|last2=Ogston|first2=S.|last3=Hussain|first3=S. S. M.|date=2017|title=Improvement in symptoms of obstructive sleep apnoea in children following tonsillectomy versus tonsillotomy: a systematic review and meta-analysis|journal=Clinical Otolaryngology|language=en|volume=42|issue=2|pages=275–282|doi=10.1111/coa.12717|pmid=27506317|s2cid=1784671|issn=1749-4486}}</ref><ref name=Ste2014>{{Cite journal|last=Stelter|first=Klaus|date=2014-12-01|title=Tonsillitis and sore throat in children|journal=GMS Current Topics in Otorhinolaryngology, Head and Neck Surgery|volume=13|pages=Doc07|doi=10.3205/cto000110|issn=1865-1011|pmc=4273168|pmid=25587367}}</ref>
Approximately one in twenty adult patients develops significant bleeding at this time. The bleeding may quickly stop naturally, or via mild intervention (e.g. gargling cold water). Otherwise, a surgeon must repair the bleeding immediately by [[cauterization]], which presents all the risks associated with emergency surgery (most having to do with the administration of [[anesthesia]] on a patient whose stomach is not empty). There are several different procedures available to remove tonsils, each with different advantages and disadvantges which can be discussed with your doctor. [http://aaohns.org/healthinfo/throat/tonsil_procedures.cfm] [http://www.nlm.nih.gov/medlineplus/tonsilstonsillectomy.html]

<!-- Society and culture -->
The surgery has been described since at least as early as 50 AD by [[Aulus Cornelius Celsus|Celsus]].<ref>{{cite journal |last1=Lamprell |first1=L |last2=Ahluwalia |first2=S |title=Who has been hiding in your tonsillectomy tray? Eponymous instruments in tonsillectomy surgery. |journal=The Journal of Laryngology and Otology |date=April 2015 |volume=129 |issue=4 |pages=307–13 |doi=10.1017/S0022215114003016 |pmid=25658777|s2cid=42461145 }}</ref> In the United States, as of 2010, tonsillectomy is performed less frequently than in the 1970s although it remains the second most common [[outpatient surgical procedure]] in children.<ref name=Oto2019/> The typical cost when done as an [[inpatient]] in the United States is US$4,400 as of 2013.<ref>{{cite journal |last1=Sun |first1=GH |last2=Auger |first2=KA |last3=Aliu |first3=O |last4=Patrick |first4=SW |last5=DeMonner |first5=S |last6=Davis |first6=MM |title=Variation in inpatient tonsillectomy costs within and between US hospitals attributable to postoperative complications. |journal=Medical Care |date=December 2013 |volume=51 |issue=12 |pages=1048–54 |doi=10.1097/MLR.0b013e3182a50325 |pmid=23969585|s2cid=22239630 }}</ref> There is some controversy as of 2019 as to when the surgery should be used.<ref name=Oto2019/><!-- Quote = Controversy persists regarding the actual benefits of tonsillectomy as compared with observation and medical treatment of throat infections. --><ref name="Burton2014" /><!-- Quote = but the indications for surgery are controversial --> There are variations in the rates of tonsillectomy between and within countries.<ref name=EU2019>{{Cite web|url=https://ec.europa.eu/eurostat/statistics-explained/index.php/Surgical_operations_and_procedures_statistics#Number_of_surgical_operations_and_procedures|title=Surgical operations and procedures statistics - Statistics Explained|website=ec.europa.eu|access-date=2019-10-08}}</ref><ref name=Sul2010 />

==Medical uses==
Tonsillectomy is mainly undertaken for [[sleep apnea]] and recurrent or chronic [[tonsillitis]].<ref name=Oto2019/> It is also carried out for [[peritonsillar abscess]], [[periodic fever, aphthous stomatitis, pharyngitis and adenitis]] (PFAPA), [[guttate psoriasis]], nasal [[airway obstruction]], [[tonsil cancer]] and [[diphtheria carrier state]]. For children, tonsillectomy is usually combined with the [[adenoidectomy|removal of the adenoid]]. However, it is unclear whether the removal of the adenoid has any additional positive or negative effects for the treatment of recurrent sore throat.<ref name="Burton2014" /> In cases of chronic tonsillitis in adults, there is strong evidence of increased quality of life, reduction of symptoms, and economic benefit.<ref>{{Cite journal |last1=Witsell |first1=David L. |last2=Orvidas |first2=Laura J. |last3=Stewart |first3=Michael G. |last4=Hannley |first4=Maureen T. |last5=Weaver |first5=Edward M. |last6=Yueh |first6=Bevan |last7=Smith |first7=Timothy L. |last8=Goldstein |first8=Nira A. |date=January 2008 |title=Quality of life after tonsillectomy in adults with recurrent or chronic tonsillitis |url=https://onlinelibrary.wiley.com/doi/10.1016/j.otohns.2007.08.015 |journal=Otolaryngology–Head and Neck Surgery |language=en |volume=138 |issue=S1 |pages=S1-8 |doi=10.1016/j.otohns.2007.08.015 |pmid=18164373 |s2cid=704501 |issn=0194-5998}}</ref><ref>{{Cite journal |last1=Bhattacharyya |first1=Neil |last2=Kepnes |first2=Lynn J. |date=November 2002 |title=Economic Benefit of Tonsillectomy in Adults with Chronic Tonsillitis |url=http://journals.sagepub.com/doi/10.1177/000348940211101106 |journal=Annals of Otology, Rhinology & Laryngology |language=en |volume=111 |issue=11 |pages=983–988 |doi=10.1177/000348940211101106 |pmid=12450171 |s2cid=46503189 |issn=0003-4894}}</ref><ref>{{Cite journal |last1=Schwentner |first1=I. |last2=Höfer |first2=S. |last3=Schmutzhard |first3=J. |last4=Deibl |first4=M. |last5=Sprinzl |first5=G. M. |date=2007-08-11 |title=Impact of tonsillectomy on quality of life in adults with chronic tonsillitis |url=https://smw.ch/index.php/smw/article/view/760 |journal=[[Swiss Medical Weekly]] |language=en |volume=137 |issue=3132 |pages=454–461 |doi=10.4414/smw.2007.11735 |pmid=17705110 |issn=1424-3997|doi-access=free }}</ref> A randomised controlled trial of tonsillectomy versus medical treatment (antibiotics and pain killers) in adults with frequent tonsillitis found that tonsillectomy was more effective and cost effective. It resulted in fewer days with sore throat.<ref>{{Cite journal |last1=Wilson |first1=Janet A |last2=O'Hara |first2=James |last3=Fouweather |first3=Tony |last4=Homer |first4=Tara |last5=Stocken |first5=Deborah D |last6=Vale |first6=Luke |last7=Haighton |first7=Catherine |last8=Rousseau |first8=Nikki |last9=Wilson |first9=Rebecca |last10=McSweeney |first10=Lorraine |last11=Wilkes |first11=Scott |last12=Morrison |first12=Jill |last13=MacKenzie |first13=Kenneth |last14=Ah-See |first14=Kim |last15=Carrie |first15=Sean |date=2023-06-17 |title=Conservative management versus tonsillectomy in adults with recurrent acute tonsillitis in the UK (NATTINA): a multicentre, open-label, randomised controlled trial |journal=The Lancet |volume=401 |issue=10393 |pages=2051–2059 |doi=10.1016/S0140-6736(23)00519-6 |issn=0140-6736|doi-access=free |pmid=37209706 |hdl=10023/27774 |hdl-access=free }}</ref><ref>{{Cite journal |date=5 September 2023 |title=Removing tonsils is effective and cost-effective for adults with frequent tonsillitis |url=https://evidence.nihr.ac.uk/alert/removing-tonsils-is-effective-and-cost-effective-for-adults-with-frequent-tonsillitis/ |journal=NIHR Evidence|doi=10.3310/nihrevidence_59646 |s2cid=261565310 }}</ref>

===Sore throat===
Surgery is not recommended for those with fewer than seven documented throat infections in the last year, fewer than five each year for the last two years, or fewer than three each year for three years.<ref name=Oto2019/> Severely affected children who undergo surgery on average have one fewer sore throat per year in the subsequent one or two years, compared to those who do not.<ref name=Oto2019/><ref name=Burton2014/><ref name=Peds2017>{{cite journal | vauthors = Morad A, Sathe NA, Francis DO, McPheeters ML, Chinnadurai S | title = Tonsillectomy Versus Watchful Waiting for Recurrent Throat Infection: A Systematic Review | journal = Pediatrics | volume = 139 | issue = 2 | pages = e20163490 | date = February 2017 | pmid = 28096515 | pmc = 5260157 | doi = 10.1542/peds.2016-3490 }}</ref> Specifically one review of five randomized controlled trials, found a decrease from 3.6 to 3.0 episodes in the year following surgery.<ref name="Burton2014" /> In less severely affected children, surgery results in an increase, rather than a decrease of sore throats when the sore throat directly following surgery is included.<ref name="Burton2014" /> Surgery results in a reduction in school absence in the following year, but the strength of evidence is low.<ref name=Peds2017 /> Surgery does not result in an improvement in the quality of life.<ref name="Peds2017" /> Benefits of surgery do not persist over time.<ref name="Oto2019" /><ref name=Peds2017 /> Those with frequent throat infections often spontaneously improve over a year without surgery.<ref name=Oto2019/><ref name="Burton2014" /><!-- Quote = observed children with recurrent throat infections and found high rates of spontaneous resolution over 12 months --> Therefore, a certain number of people who undergo surgery will do so unnecessarily as they would not have had further episodes of tonsillitis had they not had surgery.<ref name="Burton2014" /> Evidence in adults is unclear.<ref name=Burton2014/>

In 2019, the [[American Academy of Otolaryngology|American Academy of Otolaryngology & Head and Neck Surgery]] (AAO-HNS) recommended:{{blockquote|Caregivers and patients who meet the appropriate criteria for tonsillectomy as described here should be advised of only modest anticipated benefits of tonsillectomy, as weighed against the natural history of resolution with watchful waiting, as well as the risk of surgical morbidity and complications and the unknown risk of general anesthesia exposure in children [younger than] four years of age. In considering the potential harms, the guideline panel agreed that there was not a clear preponderance of benefit over harm for tonsillectomy, even for children meeting the Paradise criteria [seven episodes in the past year, five episodes per year in the past two years, or three episodes per year in the past three years]. Instead, the group felt there to be a balance that allows either tonsillectomy or watchful waiting as an appropriate management option for these children and does not imply that all qualifying children should have surgery. The role of tonsillectomy as an option in managing children with recurrent throat infection means that there is a substantial role for shared decision making with the child's caregiver and primary care clinician.<ref name="Oto2019" />}}Many cases of the sore throat have other causes than tonsillitis and tonsillectomy is therefore not indicated for those cases.<ref name="Burton2014" /><ref name="Peds2017" /> The diagnosis of tonsillitis is often made without testing for bacteria.<ref name="Peds2017" /> The [[National Health Service|UK National Health Service]] states that it is very rare that someone needs to have their tonsils taken out, and it is usually only necessary in case of severe tonsillitis that keeps recurring.<ref>{{Cite web|url=https://www.nhs.uk/conditions/tonsillitis/|title=Tonsillitis|date=23 October 2017|website=nhs.uk|language=en|access-date=2019-06-22}}</ref>

===Obstructive sleep apnea===
Tonsillectomy improves obstructive sleep apnea (OSA) in most children.<ref name=Oto2019/> A 2015 [[Cochrane (organisation)|Cochrane]] review found moderate quality evidence for benefits in terms of quality of life and symptoms but no benefit in attention or academic performance.<ref name=Ven2015/> It recommended that physicians and parents should weigh the benefits and risks of surgery as OSA symptoms may spontaneously resolve over time.<ref name=Ven2015/> An [[AHRQ]] review however did find improvements at school.<ref name=Oto2019/> The procedure is recommended for those who have OSA that has been verified by a [[sleep study]].<ref name=Oto2019/> Studies have shown that treatment success of [[uvulopalatopharyngoplasty]] with tonsillectomy increases with tonsil size.<ref>{{Cite journal|last1=Tschopp|first1=Samuel|last2=Tschopp|first2=Kurt|date=2019|title=Tonsil size and outcome of uvulopalatopharyngoplasty with tonsillectomy in obstructive sleep apnea|url=https://onlinelibrary.wiley.com/doi/abs/10.1002/lary.27899|journal=The Laryngoscope|language=en|volume=129|issue=12|pages=E449–E454|doi=10.1002/lary.27899|pmid=30848478 |s2cid=73503702 |issn=1531-4995}}</ref>

===Other===
There is no good evidence for other uses such as [[tonsil stones]], [[bad breath]], [[trouble swallowing]], and an [[abnormal voice]] in children.<ref name=Oto2019/><!-- The last category contains a series of poorly validated indications for tonsillectomy that have not been tested in any controlled trials or case series: chronic tonsillitis, febrile seizures, muffled ("hot potato") speech, halitosis, malocclusion of teeth, tonsillar hypertrophy, cryptic tonsils, and chronic pharyngeal carriage of GABHS. -->

==Complications==
While generally safe, tonsillectomy may result in several [[Complication (medicine)|complications]], some of which are serious.<ref name="Oto2019" /><ref name=Burton2014/> Complications are divided into primary (first 24 hours after surgery), and secondary (after 24 hours), with bleeding being the most common complication. Other common complications are [[postoperative nausea and vomiting]], [[dehydration]], trouble eating, [[ear pain]], [[Dysgeusia|taste dysfunction]] and trouble talking.<ref name="Oto2019" /><ref>{{Cite journal|last1=Kim|first1=Boo-Young|last2=Lee|first2=So Jeong|last3=Yun|first3=Ju Hyun|last4=Bae|first4=Jung Ho|date=2020-08-01|title=Taste Dysfunction after Tonsillectomy: A Meta-analysis|journal=Annals of Otology, Rhinology & Laryngology|volume=130|issue=2|language=en-US|pages=205–210|doi=10.1177/0003489420946770|pmid=32741219|s2cid=220943451|issn=0003-4894}}</ref> In rare cases, tonsillectomy may also cause damage to the [[Human tooth|teeth]] (because of the clamp that is placed in the mouth during surgery), [[larynx]] and [[Pharynx|pharyngeal wall]], [[Aspiration pneumonia|aspiration]], [[respiratory compromise]], [[laryngospasm]], [[laryngeal edema]] and [[cardiac arrest]].<ref name=Oto2019/> Throat pain typically lasts about one to two weeks after surgery.<ref name=Oto2019/><ref name=Dam2016/>

Significant post-operative primary bleeding occurs in 0.2–2.2% of people, and secondary bleeding in 0.1–3.3%.<ref name=Oto2019/>
In several reported case series, the rate of post tonsillectomy bleeding ranged from 2.0% to 7.0%.<ref>{{cite journal |last1=Galindo Torres |first1=Blanca Pilar |last2=De Miguel García |first2=Félix |last3=Whyte Orozco |first3=Jaime |title=Tonsillectomy in adults: Analysis of indications and complications |journal=Auris Nasus Larynx |date=June 2018 |volume=45 |issue=3 |pages=517–521 |doi=10.1016/j.anl.2017.08.012|pmid=28927847 }}</ref><ref>{{cite journal |last1=Seshamani |first1=Meena |last2=Vogtmann |first2=Emily |last3=Gatwood |first3=Justin |last4=Gibson |first4=Teresa B. |last5=Scanlon |first5=Dennis |title=Prevalence of Complications from Adult Tonsillectomy and Impact on Health Care Expenditures |journal=Otolaryngology–Head and Neck Surgery |date=April 2014 |volume=150 |issue=4 |pages=574–581 |doi=10.1177/0194599813519972|pmid=24691645 |s2cid=370599 }}</ref><ref name="Postoperative Bleeding and Associat">{{cite journal |last1=Francis |first1=David O. |last2=Fonnesbeck |first2=Christopher |last3=Sathe |first3=Nila |last4=McPheeters |first4=Melissa |last5=Krishnaswami |first5=Shanthi |last6=Chinnadurai |first6=Sivakumar |title=Postoperative Bleeding and Associated Utilization following Tonsillectomy in Children: A Systematic Review and Meta-analysis |journal=Otolaryngology–Head and Neck Surgery |date=March 2017 |volume=156 |issue=3 |pages=442–455 |doi=10.1177/0194599816683915|pmid=28094660 |pmc=5639328 }}</ref>
Also in veterinary surgery, bleeding was a common complication.<ref>{{cite journal |last1=Turkki |first1=Outi Marita |last2=Bergman |first2=Caroline Elisabeth |last3=Lee |first3=Marcel H. |last4=Höglund |first4=Odd Viking |title=Complications of canine tonsillectomy by clamping technique combined with monopolar electrosurgery – a retrospective study of 39 cases |journal=BMC Veterinary Research |date=December 2022 |volume=18 |issue=1 |pages=242 |doi=10.1186/s12917-022-03342-0|pmid=35751056 |pmc=9229076 |doi-access=free }}</ref> A meta-analysis reported that frequency of bleeding after tonsillectomy across different techniques did not differ.<ref name="Postoperative Bleeding and Associat"/>

It is estimated 1.3% of people will have a delayed discharge (of 4 to 24 hours) due to a complication, and up to 3.9% will require repeat admission to hospital. The main reasons for either keeping a person in hospital, or readmitting them after tonsillectomy are uncontrolled pain, vomiting, fever, or bleeding. Death occurs as a result in between 1 in 2,360 and 56,000 procedures.<ref name=Oto2019/> Bleeding accounts for one-third of deaths.<ref name="Oto2019" /> As the procedure is done under [[General anaesthesia|general anesthesia]], there are anesthesia risks.<ref name=Oto2019/>

=== Immune system ===
There is no evidence tonsillectomy affects long term [[Immune system|immune function]].<ref name="Oto2019" /><!-- quote = Nevertheless, there are no studies to date that demonstrate a significant clinical impact of tonsillectomy on the immune system. --><ref name=Bit2015>{{cite journal |last1=Bitar |first1=MA |last2=Dowli |first2=A |last3=Mourad |first3=M |title=The effect of tonsillectomy on the immune system: A systematic review and meta-analysis. |journal=International Journal of Pediatric Otorhinolaryngology |date=August 2015 |volume=79 |issue=8 |pages=1184–91 |doi=10.1016/j.ijporl.2015.05.016 |pmid=26055199}}</ref> It does not appear to affect the long term risk of [[infection]]s in other areas of the body.<ref>{{cite journal |last1=Ingram |first1=DG |last2=Friedman |first2=NR |title=Toward Adenotonsillectomy in Children: A Review for the General Pediatrician. |journal=JAMA Pediatrics |date=December 2015 |volume=169 |issue=12 |pages=1155–61 |doi=10.1001/jamapediatrics.2015.2016 |pmid=26436644}}</ref> Some studies have found small changes in [[Immunoglobulins|immunoglobulin]] concentrations after tonsillectomy but these are of unclear significance.<ref name="Oto2019" /> Tonsillectomy is a risk factor for [[Crohn's disease]].<ref>{{Cite journal |last1=Zhao |first1=Min |last2=Feng |first2=Rui |last3=Ben-Horin |first3=Shomron |author3-link=Shomron Ben-Horin |last4=Zhuang |first4=Xiaojun |last5=Tian |first5=Zhenyi |last6=Li |first6=Xiaozhi |last7=Ma |first7=Ruiqi |last8=Mao |first8=Ren |last9=Qiu |first9=Yun |last10=Chen |first10=Minhu |date=2021-11-24 |title=Systematic review with meta-analysis: environmental and dietary differences of inflammatory bowel disease in Eastern and Western populations |url=https://pubmed.ncbi.nlm.nih.gov/34820868/ |journal=Alimentary Pharmacology & Therapeutics |volume=55 |issue=3 |pages=266–276 |doi=10.1111/apt.16703 |issn=1365-2036 |pmid=34820868 |s2cid=244686665}}</ref><ref name=":3" /> A 2024 [[meta-analysis]] found that tonsillectomy is associated with Crohn's disease and [[ulcerative colitis]], with an [[odds ratio]] of 1.93 and 1.24, respectively.<ref name=":3">{{Cite journal |last1=Amin |first1=Rutvi |last2=Mansabdar |first2=Aditya |last3=Gu |first3=Hyundam |last4=Gangineni |first4=Bhavani |last5=Mehta |first5=Neev |last6=Patel |first6=Harini |last7=Patel |first7=Neel |last8=Laller |first8=Srishti |last9=Vinayak |first9=Suprada |last10=Abdulqader |first10=Mohammed Ali |last11=Jain |first11=Hardik |last12=Rekhraj |first12=Amitjeet Singh |last13=Adimoulame |first13=Harshini |last14=Singh |first14=Gurinder |last15=Moonjely Davis |first15=Jose |date=April 2024 |title=Mucosa-Associated Lymphoid Tissue Surgeries as a Possible Risk for Inflammatory Bowel Disease: A Systematic Review and Meta-Analysis |url=https://gastrores.org/index.php/Gastrores/article/view/1672/1706 |journal=Gastroenterology Research |language=en |volume=17 |issue=2 |pages=90–99 |doi=10.14740/gr1672 |pmid=38716286 |issn=1918-2805|pmc=11073456 }}</ref> There is an association suggesting an increase in the risk of developing [[multiple sclerosis]] if done before the age of 20.<ref name=":1">{{cite journal | vauthors = Lunny C, Knopp-Sihota JA, Fraser SN | title = Surgery and risk for multiple sclerosis: a systematic review and meta-analysis of case-control studies | journal = BMC Neurology | volume = 13 | pages = 41 | date = May 2013 | pmid = 23648120 | pmc = 3651719 | doi = 10.1186/1471-2377-13-41 | doi-access = free }}</ref> A meta-analysis published in 2020 indicated a statistically significant association between a history of tonsillectomy and the development of [[Hodgkin lymphoma|Hodgkin's disease]].<ref>{{Cite journal|last1=Albawaliz|first1=Anas|last2=Fatima|first2=Zainab|last3=Abonofal|first3=Abdulrahman|last4=Abumoawad|first4=Abdelrhman|last5=Al Momani|first5=Laith|last6=Shrestha|first6=Anuj|date=2020-05-20|title=The association between tonsillectomy and Hodgkin's lymphoma: A systematic review and meta-analysis.|journal=Journal of Clinical Oncology|volume=38|issue=15_suppl|pages=e20015|doi=10.1200/JCO.2020.38.15_suppl.e20015|s2cid=219775558|issn=0732-183X}}</ref> A meta-analysis from 2022 concluded that a history of tonsillectomy is associated with an increased risk of [[breast cancer]].<ref>{{Cite journal |last1=Kacimi |first1=Salah Eddine O. |last2=Elgenidy |first2=Anas |last3=Cheema |first3=Huzaifa Ahmad |last4=Ould Setti |first4=Mounir |last5=Khosla |first5=Atulya Aman |last6=Benmelouka |first6=Amira Yasmine |last7=Aloulou |first7=Mohammad |last8=Djebabria |first8=Kawthar |last9=Shamseldin |first9=Laila Salah |last10=Riffi |first10=Omar |last11=Mesli |first11=Nabil Smain |date=2022-07-20 |title=Prior Tonsillectomy and the Risk of Breast Cancer in Females: A Systematic Review and Meta-analysis |journal=Frontiers in Oncology |volume=12 |pages=925596 |doi=10.3389/fonc.2022.925596 |pmid=35936707 |pmc=9350012 |issn=2234-943X|doi-access=free }}</ref> The relationship between childhood tonsillectomy and the development of other cancer types in adulthood remains unclear.<ref>{{Cite journal|last=Holló|first=Gábor|date=2021-09-15|title=Tonsillectomy and the incidence of various types of cancer|journal=Immunologic Research|volume=69 |issue=6 |pages=467–470 |language=en|doi=10.1007/s12026-021-09230-3|pmid=34523058|pmc=8580919 |issn=1559-0755|doi-access=free}}</ref>

==Surgical procedure==
[[Image:Pair of Removed Tonsils.JPG|thumb|Cryptic tonsils immediately following surgical removal (bilateral tonsillectomy).]]
[[Image:Tonsilectomia.JPG|thumb|Throat 1 day after a tonsillectomy.]]
[[Image:Uvula without tonsils.jpg|thumb|Throat some days after a tonsillectomy.]]
For the past 50 years at least, tonsillectomy has been performed by dissecting the tonsil from its surrounding [[fascia]], a so-called total, or extra-capsular tonsillectomy. Problems including pain and bleeding led to a recent resurgence in interest in sub-total tonsillectomy or ''tonsillotomy'', which was popular 60 to 100 years ago, in an effort to reduce these complications.<ref name="intracapsular">{{cite journal | vauthors = Walton J, Ebner Y, Stewart MG, April MM | title = Systematic review of randomized controlled trials comparing intracapsular tonsillectomy with total tonsillectomy in a pediatric population | journal = Archives of Otolaryngology–Head & Neck Surgery | volume = 138 | issue = 3 | pages = 243–9 | date = March 2012 | pmid = 22431869 | doi = 10.1001/archoto.2012.16 | doi-access = free }}</ref> The generally accepted procedure for 'total' tonsillectomy uses a [[scalpel]] and blunt dissection, [[electrocautery]], or [[diathermy]].<ref name=":7">{{Cite journal|last1=Pinder|first1=Darren K.|last2=Wilson|first2=Helena|last3=Hilton|first3=Malcolm P.|date=2011-03-16|title=Dissection versus diathermy for tonsillectomy|journal=The Cochrane Database of Systematic Reviews|volume=2011 |issue=3|pages=CD002211|doi=10.1002/14651858.CD002211.pub2|issn=1469-493X|pmid=21412878|pmc=7097733}}</ref> [[Harmonic scalpel]]s or [[laser]]s have also been used. Bleeding is stopped with electrocautery, ligation by [[surgical sutures|sutures]], and the topical use of [[thrombin]], a protein that induces [[Coagulation|blood clotting]]. The most effective surgical approach has not been well studied.<ref name=":7" />

It is not known whether the benefits of subtotal tonsillectomy in obstructive sleep apnea are enduring. But this is also the case for tonsillectomy for sleep apnea. There have been no randomised controlled trials of long term effectiveness of tonsillectomy for sleep apnea.<ref name=Ven2015/>

===Methods===
The [[scalpel]] is the preferred surgical instrument of many [[Otolaryngology|ear, nose, and throat specialists]]. However, there are other techniques and a brief review of each follows:

*'''Dissection and snare method''': Removal of the tonsils by use of a forceps and scissors with a wire loop called a snare was formerly the most common method practiced by [[otolaryngologist]]s, but has been largely replaced in favor of other techniques.{{citation needed|date=November 2013}} The procedure requires the [[patient]] to undergo [[general anesthesia]]; the tonsils are completely removed and the remaining tissue surface is cauterized. The [[patient]] will leave with minimal post-operative [[bleeding]].
*'''[[Electrocautery]]''': Electrocautery uses electrical energy to separate the tonsillar tissue and assists in reducing [[blood]] loss through [[cauterization]]. Research has shown that the heat of electrocautery (400&nbsp;[[Celsius|°C]]) may result in thermal injury to surrounding [[cell (biology)|tissue]]. This may result in more discomfort during the postoperative period.
*'''Radiofrequency ablation''': Monopolar [[radiofrequency]] thermal ablation transfers radiofrequency energy to the tonsil tissue through probes inserted in the tonsil. The procedure can be performed in an office (outpatient) setting under light sedation or [[local anesthesia]]. After the treatment is performed, [[scarring]] occurs within the tonsil causing it to decrease in size over a period of several weeks. The treatment can be performed several times. The advantages of this technique are minimal discomfort, ease of operations, and immediate return to work or school. Tonsillar tissue remains after the procedure but is less prominent. This procedure is recommended for treating enlarged tonsils and not chronic or recurrent [[tonsillitis]].
*'''Coblation tonsillectomy''': This surgical procedure is performed using plasma to remove the tonsils. Coblation technology combines radiofrequency energy and saline to create a plasma field. The plasma field is able to dissociate molecular bonds of target tissue while remaining relatively cool (40–70&nbsp;°C),<ref>{{cite web|url=http://www.smith-nephew.com/professional/products/ear-nose-and-throat/technology/coblation/|title=COBLATION Plasma Technology – ENT|website=Smith & Nephew US Professional|access-date=15 July 2016}}</ref> which results in minimal or no damage to surrounding healthy tissue. A Coblation tonsillectomy is carried out in an operating room setting, with the patient under general anesthesia. Tonsillectomies are generally performed for two main reasons: tonsillar hypertrophy (enlarged tonsils) and recurrent tonsillitis. It has been claimed that this technique results in less pain, faster healing, and less post operative care.<ref>{{cite journal | vauthors = Friedman M, LoSavio P, Ibrahim H, Ramakrishnan V | title = Radiofrequency tonsil reduction: safety, morbidity, and efficacy | journal = The Laryngoscope | volume = 113 | issue = 5 | pages = 882–7 | date = May 2003 | pmid = 12792327 | doi = 10.1097/00005537-200305000-00020 | s2cid = 41047058 }}</ref> However, review of 21 studies gives conflicting results about levels of pain, and its comparative safety has yet to be confirmed.<ref>{{cite journal | vauthors = Windfuhr JP | title = [Coblation tonsillectomy: a review of the literature] | journal = Hno | volume = 55 | issue = 5 | pages = 337–48 | date = May 2007 | pmid = 17431570 | doi = 10.1007/s00106-006-1523-3 | s2cid = 7088360 }}</ref> This technique has been criticized for a higher than expected rate of bleeding presumably due to the low temperature which may be insufficient to seal the divided [[blood vessel]]s but several papers offer conflicting (some positive, some negative) results. More recent studies of coblation tonsillectomy indicate reduced pain and ostalgia;<ref>{{cite journal | vauthors = Hong SM, Cho JG, Chae SW, Lee HM, Woo JS | title = Coblation vs. Electrocautery Tonsillectomy: A Prospective Randomized Study Comparing Clinical Outcomes in Adolescents and Adults | journal = Clinical and Experimental Otorhinolaryngology | volume = 6 | issue = 2 | pages = 90–3 | date = June 2013 | pmid = 23799166 | pmc = 3687068 | doi = 10.3342/ceo.2013.6.2.90 }}</ref> less intraoperative or postoperative complications;<ref>{{cite journal | vauthors = Omrani M, Barati B, Omidifar N, Okhovvat AR, Hashemi SA | title = Coblation versus traditional tonsillectomy: A double blind randomized controlled trial | journal = Journal of Research in Medical Sciences | volume = 17 | issue = 1 | pages = 45–50 | date = January 2012 | pmid = 23248656 | pmc = 3523437 }}</ref> lesser incidence of delayed hemorrhage, more significantly in pediatric populations,<ref>{{cite journal | vauthors = Walner DL, Miller SP, Villines D, Bussell GS | title = Coblation tonsillectomy in children: incidence of bleeding | journal = The Laryngoscope | volume = 122 | issue = 10 | pages = 2330–6 | date = October 2012 | pmid = 22833366 | doi = 10.1002/lary.23526 | s2cid = 206199958 }}</ref><ref>{{cite journal | vauthors = Khan I, Abelardo E, Scott NW, Shakeel M, Menakaya O, Jaramillo M, Mahmood K | title = Coblation tonsillectomy: is it inherently bloody? | journal = European Archives of Oto-Rhino-Laryngology | volume = 269 | issue = 2 | pages = 579–83 | date = February 2012 | pmid = 21547390 | doi = 10.1007/s00405-011-1609-8 | s2cid = 30491811 }}</ref><ref>{{cite journal | vauthors = Mösges R, Hellmich M, Allekotte S, Albrecht K, Böhm M | title = Hemorrhage rate after coblation tonsillectomy: a meta-analysis of published trials | journal = European Archives of Oto-Rhino-Laryngology | volume = 268 | issue = 6 | pages = 807–16 | date = June 2011 | pmid = 21373898 | pmc = 3087106 | doi = 10.1007/s00405-011-1535-9 }}</ref> less postoperative pain and early return to daily activities, fewer secondary infections of the tonsil bed and significantly lower rates of secondary hemorrhage.<ref>{{cite journal | vauthors = Belloso A, Chidambaram A, Morar P, Timms MS | title = Coblation tonsillectomy versus dissection tonsillectomy: postoperative hemorrhage | journal = The Laryngoscope | volume = 113 | issue = 11 | pages = 2010–3 | date = November 2003 | pmid = 14603065 | doi = 10.1097/00005537-200311000-00029 | s2cid = 7386342 }}</ref> Unlike the electrosurgery procedure, Coblation Tonsillectomy generates significantly lower temperatures on contacted tissue.<ref>{{cite web|url=http://mytonsils.com/coblation-facts.aspx|title=COBLATION Tonsillectomy – My Tonsils|website=My Tonsils.com|access-date=11 July 2016|archive-date=14 July 2016|archive-url=https://web.archive.org/web/20160714175824/http://mytonsils.com/coblation-facts.aspx|url-status=dead}}</ref> Long-term studies seem to show that surgeons experienced with the technique have very few complications.
*'''[[Harmonic scalpel]]''': This [[medical device]] uses [[Ultrasound|ultrasonic]] [[Vibration|vibrating]] of its blade at a frequency of 55 [[kHz]]. Invisible to the naked [[Human eye|eye]], the vibration transfers energy to the tissue, providing simultaneous cutting and [[coagulation]]. The temperature of the surrounding tissue reaches 80&nbsp;°C. Proponents of this procedure assert that the result is precise cutting with minimal thermal damage.
*'''Thermal Welding''': A new technology which uses pure [[thermal energy]] to seal and divide the tissue. The absence of thermal spread means that the temperature of surrounding tissue is only 2–3&nbsp;°C higher than normal body temperature. Clinical papers show patients with minimal post-operative pain (no requirement for narcotic pain-killers), zero edema (swelling) plus almost no incidence of bleeding. Hospitals in the US are advertising this procedure as "Painless Tonsillectomy". Also known as Tissue Welding.
*'''Carbon dioxide laser''': When a laser is used to perform tonsillectomy, it can be under local anaesthetic with anaesthetic spray only, called tonsillotomy (or tonsil resurfacing or partial tonsillectomy), or it can be performed under general anaesthetic when it is called intra-capsular tonsillectomy, using an operating microscope for magnification. The carbon dioxide laser in scanning mode is an excellent vapouriser of tissue, and in conjunction with a computerised pattern generator and operating microscope with micromanipulator, it can result in near total removal of tonsil tissue whilst preserving the capsule of the tonsil. This leads to a significantly reduced bleeding and pain rate.<ref>{{cite journal | vauthors = Randive S, Stevens B, Dilkes M, Mehta V | title = Regional Anaesthesia and Acute Pain, Paper No: 852.00: Do laser tonsillectomies need less opioids as compared to standard tonsillectomies: a retrospective comparison of peri-operative analgesic requirement | doi = 10.1093/bja/aer489 |journal=British Journal of Anaesthesia |volume=108 |pages=ii387–ii437 |year=2012 |doi-access=free }}</ref> The local anaesthetic technique takes around 10 minutes, the general around 20 minutes depending on the size of the tonsils - the bigger they are, the longer it takes. The general anaesthetic operation has a revision rate of 1:50, the local anaesthetic tonsillotomy 1:4.5. This is different from procedures where a laser is used to reduce or resurface the tonsils (e.g. laser cryptolysis). Providing the absence of certain contra-indications such as sensitive [[gag reflex]], LAST can be performed under local anesthetic as an [[outpatient]] procedure. A carbon dioxide laser is commonly used, and is swept over each tonsil 8–10 times. The smoke is aspirated out of the mouth to prevent smoke inhalation. Often, more than one procedure is required, each lasting about 20 minutes. Due to the frequent requirement for multiple sessions, this treatment may work out more expensive than a single session tonsillectomy. A degree of patient compliance is required, making it unsuitable for young children and anxious persons, who risk harm if they move during the procedure.<ref name="NICE LAST">{{cite web|url=http://www.nice.org.uk/nicemedia/live/11047/30726/30726.pdf|title=Interventional procedure overview of laser assisted serial tonsillectomy|publisher=National institute of clinical excellence|access-date=30 November 2013|archive-url=https://web.archive.org/web/20131204042812/http://www.nice.org.uk/nicemedia/live/11047/30726/30726.pdf|archive-date=4 December 2013|url-status=dead|df=dmy-all}}</ref>
*'''Microdebrider''': The microdebrider is a powered rotary shaving device with continuous suction often used during [[Paranasal sinus|sinus]] surgery. It is made up of a cannula or tube, connected to a hand piece, which in turn is connected to a motor with foot control and a suction device. The endoscopic microdebrider is used in performing a partial tonsillectomy, by partially shaving the tonsils. This procedure entails eliminating the obstructive portion of the tonsil while preserving the tonsillar capsule. A natural biologic dressing is left in place over the [[pharyngeal muscles]], preventing injury, inflammation, and infection. The procedure results in less post-operative pain, a more rapid recovery, and perhaps fewer delayed complications. However, the partial tonsillectomy is suggested for enlarged tonsils—not those that incur repeated infections.{{citation needed|date=November 2018}}

===Medications===
A single dose of the [[corticosteroid]] drug [[dexamethasone]] may be given during surgery to prevent [[Postoperative nausea and vomiting|post-operative vomiting]].<ref name="Steward-CC">{{cite journal | vauthors = Steward DL, Grisel J, Meinzen-Derr J | title = Steroids for improving recovery following tonsillectomy in children | journal = The Cochrane Database of Systematic Reviews | issue = 8 | pages = CD003997 | date = August 2011 | volume = 2011 | pmid = 21833946 | pmc = 6485432 | doi = 10.1002/14651858.CD003997.pub2 | url = https://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0012464/ | editor1-last = Steward | editor1-first = David L }}</ref> A dose of dexamethasone during surgery prevents vomiting in one out of every five children. A dose of dexamethasone may help children return to a normal diet more quickly and have less post-operative pain.<ref name="Steward-CC" /> Many people are prescribed antibiotics following a tonsillectomy, however, the benefits and potential harms have not been well studied.<ref name=":6">{{Cite journal|last1=Dhiwakar|first1=Muthuswamy|last2=Clement|first2=W. A.|last3=Supriya|first3=Mrinal|last4=McKerrow|first4=William|date=2012-12-12|title=Antibiotics to reduce post-tonsillectomy morbidity|journal=The Cochrane Database of Systematic Reviews|volume=2012|issue=12 |pages=CD005607|doi=10.1002/14651858.CD005607.pub4|issn=1469-493X|pmid=23235625|editor1-last=Dhiwakar|editor1-first=Muthuswamy|pmc=11366083}}</ref> Antibiotics are not suggested to be used routinely following tonsillectomy.<ref name=":6" />

==Post-surgery care==
A sore throat will persist approximately two weeks following surgery while pain following the procedure is significant and may necessitate a hospital stay.<ref name=Gra2008>{{cite book|title=Pediatric ENT |last1=Graham |first1=John M.| first2 = Glenis K. | last2 = Scadding | first3 = Peter D. | last3 = Bull |publisher=Springer|year=2008|isbn=978-3-540-69930-9|page=136}}</ref> Recovery can take from 7 to 10 days and proper hydration is very important during this time, since [[dehydration]] can increase throat pain, leading to a [[Positive feedback|circle]] of poor fluid intake.<ref name="medical-surgical nursing">{{cite book|title=Introductory medical-surgical nursing|last=Timby|first=Barbara Kuhn|publisher=Lippincott Williams & Wilkins|year=2006|isbn=978-0-7817-8032-2|page=[https://archive.org/details/introductorymedi00timb/page/357 357]|author2=Nancy Ellen Smith|url=https://archive.org/details/introductorymedi00timb/page/357}}</ref><ref>{{cite book|title=Mayo Clinic diet manual|last=Pemberton|first=Cecilia M.|publisher=B.C. Decker|year=1988|isbn=978-1-55664-032-2|url=https://archive.org/details/mayoclinicdietma0000unse}}{{page needed|date=November 2018}}</ref> Tonsillectomy appears to be more painful in adults than children.<ref>{{cite journal | vauthors = Graumüller S, Laudien B |doi=10.1016/S0531-5131(03)01073-2 |title=Postoperative pain after tonsillectomy—comparison of children and adults |journal=International Congress Series |volume=1254 |pages=469–472 |year=2003 }}</ref> Controlling the pain following tonsillectomy is important to ensure that people can start eating again normally following the procedure.<ref>{{Cite journal|last1=Hollis|first1=L. J.|last2=Burton|first2=M. J.|last3=Millar|first3=J. M.|date=2000|title=Perioperative local anaesthesia for reducing pain following tonsillectomy|journal=The Cochrane Database of Systematic Reviews|volume=1999 |issue=2|pages=CD001874|doi=10.1002/14651858.CD001874|issn=1469-493X|pmc=7025437|pmid=10796831}}</ref>

At some point, most commonly 7 to 11 days after the surgery (but occasionally as long as two weeks after), bleeding can occur when [[Wound healing#Proliferative phase|scabs]] begin sloughing off from the surgical sites. The overall risk of bleeding is approximately 1–2%. It is higher in adults, especially males over age 70 and three-quarters of bleeding incidents occur on the same day as the surgery.<ref name="Windfuhr JP 2004">{{cite journal | vauthors = Windfuhr JP, Chen YS, Remmert S | title = Hemorrhage following tonsillectomy and adenoidectomy in 15,218 patients | journal = Otolaryngology–Head and Neck Surgery | volume = 132 | issue = 2 | pages = 281–6 | date = February 2005 | pmid = 15692542 | doi = 10.1016/j.otohns.2004.09.007 | s2cid = 3189359 }}</ref> Approximately 3% of adults develop bleeding at this time which may sometimes require surgical intervention.

Recommendations for pain management include [[ibuprofen]] and [[paracetamol]] (acetaminophen).<ref name=Oto2019/> The [[opioid]] [[codeine]] is not recommended for those less than 12 years old.<ref name=Oto2019/> There is a theoretical concern that [[Nonsteroidal anti-inflammatory drug|NonSteroidal Anti-Inflammatory Drugs]] (NSAIDs) may increase the risk of bleeding but evidence does not support such a risk.<ref>{{cite journal |last1=Lewis |first1=SR |last2=Nicholson |first2=A |last3=Cardwell |first3=ME |last4=Siviter |first4=G |last5=Smith |first5=AF |title=Nonsteroidal anti-inflammatory drugs and perioperative bleeding in paediatric tonsillectomy. |journal=The Cochrane Database of Systematic Reviews |date=18 July 2013 |volume=2013 |issue=7 |pages=CD003591 |doi=10.1002/14651858.CD003591.pub3 |pmid=23881651|pmc=7154573 }}</ref> Further research is required to determine if mouth rinses, mouthwashes and sprays help improve recovery following surgery.<ref>{{Cite journal|last1=Fedorowicz|first1=Zbys|last2=van Zuuren|first2=Esther J.|last3=Nasser|first3=Mona|last4=Carter|first4=Ben|last5=Al Langawi|first5=Jassim H.|date=2013-09-10|title=Oral rinses, mouthwashes and sprays for improving recovery following tonsillectomy|journal=The Cochrane Database of Systematic Reviews|issue=9|pages=CD007806|doi=10.1002/14651858.CD007806.pub4|issn=1469-493X|pmid=24022333}}</ref>

Some surgeons recommend starting with a soft diet for two weeks before advancing to normal diet. This is to prevent any sharp foods from potentially irritating the tonsillar fossae during the healing stage and provoking a bleed.

== Rates ==
There are variations in tonsillectomy rates, both between and within countries.<ref name=EU2019 /><ref name=Sul2010 /> In 2015, tonsillectomy rates in the Netherlands, Belgium, Finland and Norway were at least twice those in the UK but rates in Spain, Italy and Poland were at least a quarter lower.<ref name=EU2019 /> Tonsillectomy rates even vary considerably between neighbouring countries. For example, rates in Croatia are three times those in Slovenia.<ref name=EU2019 /> Variations between countries may be explained by a lack of or differences between guidelines.<ref name=Ste2014 /> However differences in guidelines cannot explain the seven-fold variation between local authority areas within England.<ref name=Sul2010 />

In Germany tonsillectomy rates between regions differ by up to a factor of 8.<ref name=Ste2014 /> A 2010 study in England found the annual tonsillectomy rate per 100,000 between 2000 and 2005 was 754 in the highest region, the national average was 304 and the lowest region was 102.<ref name=Sul2010 /> This means there is a seven-fold difference between the region with the highest tonsillectomy rate and the region with the lowest one.<ref name=Sul2010>{{cite journal | vauthors = Suleman M, Clark MP, Goldacre M, Burton M | title = Exploring the variation in paediatric tonsillectomy rates between English regions: a 5-year NHS and independent sector data analysis | journal = Clinical Otolaryngology | volume = 35 | issue = 2 | pages = 111–7 | date = April 2010 | pmid = 20500580 | doi = 10.1111/j.1749-4486.2010.02086.x | s2cid = 31719394 | doi-access = free }}</ref> In 2006, English Chief Medical Officer [[Liam Donaldson]] revealed that unnecessary tonsillectomies and unnecessary [[Hysterectomy|hysterectomies]] combined cost the [[National Health Service|British National Health Service]] 21 million pounds a year.<ref>{{Cite news|url=https://www.standard.co.uk/news/billions-of-nhs-money-wasted-on-ineffective-operations-7207000.html|title=Billions of NHS money wasted on 'ineffective' operations|work=Evening Standard|access-date=2018-01-27|language=en-GB}}</ref>

The rise in adenotonsillectomies for sleep apnea in the USA has been greater than the decline in tonsillectomies for sore throat.<ref name="pmid20974339">{{cite journal|vauthors=Bhattacharyya N, Lin HW|date=November 2010|title=Changes and consistencies in the epidemiology of pediatric adenotonsillar surgery, 1996–2006|journal=Otolaryngology–Head and Neck Surgery|volume=143|issue=5|pages=680–4|doi=10.1016/j.otohns.2010.06.918|pmid=20974339|s2cid=33142532|doi-access=free}}</ref>

=== Evidence-based indications ===
In 2018, a study of the medical records of 1.6 million UK children found 15,760 had sufficient sore throats to justify tonsillectomy and 13.6% (2,144) underwent surgery.<ref name="Šumilo_2018" /> The same study found 18,281 children who had undergone tonsillectomy, and of these only 11.7% (2,144) had evidence-based indications (i.e. frequent enough sore throats to justify surgery).<ref name="Šumilo_2018" /> The majority of tonsillectomies were undertaken for indications which did not have an evidence-base: five to six sore throats in one year (12.4%), two to four sore throats in one year (44.6%), sleep disordered breathing (12.3%), or obstructive sleep apnea (3.9%).<ref name="Šumilo_2018">{{cite journal | vauthors = Šumilo D, Nichols L, Ryan R, Marshall T | title = Incidence of indications for tonsillectomy and frequency of evidence-based surgery: a 12-year retrospective cohort study of primary care electronic records | journal = The British Journal of General Practice | volume = 69 | issue = 678 | pages = e33–e41 | date = January 2019 | pmid = 30397014 | pmc = 6301361 | doi = 10.3399/bjgp18X699833 }}</ref> In the UK therefore, most children who undergo tonsillectomy probably do not benefit and most children who might benefit do not undergo tonsillectomy.<ref name="Šumilo_2018" /> The study concluded that 32,500 (close to 90%) out of the 37,000 children who have their tonsils removed annually "are unlikely to benefit" and that surgery therefore may do more harm than good to those children.<ref name="Šumilo_2018" /> Tonsillectomy rates are lower in the UK than in most other western European countries.<ref name="EU2019" />

Table: Numbers of children (from 1.6 million children between 2005 and 2016 in the UK) identified with possible indications for tonsillectomy and the numbers who subsequently undergo tonsillectomy.
{| class="wikitable"
|-
! Condition which might be considered an indication for tonsillectomy !! Number of children<br>consulting with<br>this indication !! Proportion with<br>this indication<br> undergoing<br> tonsillectomy!! Proportion of all<br>tonsillectomies<br>attributable to<br>this indication
|-
|| Tonsillar tumour || 5 || 0%|| 0.0%
|-
| Aphthous stomatitis, pharyngitis & cervical adenitis syndrome || 435 || 3.4%|| 0.1%
|-
| Paradise criteria || 15,320 || 13.9%|| 11.6%
|-
| Obstructive sleep apnea || 3,185 || 22.2%|| 3.9%
|-
| Other sleep disordered breathing || 15,205 || 14.8%|| 12.3%
|-
| Peritonsillar abscess || 675 || 14.8%|| 0.5%
|-
| '''''Recurrent sore throats / tonsillitis (episodes per year):'''''
|-
| &nbsp; 5 to 6|| 25,420 || 8.9%|| 12.4%
|-
| &nbsp; 3 to 4|| 170,687 || 3.2%|| 30.1%
|-
| &nbsp; 2 to 4 with guttate / chronic psoriasis || 939 || 3.7%|| 0.2%
|-
| &nbsp; 2 to 4 with glomerulonephritis || 148 || 4.7%|| 0.0%
|-
| &nbsp; 2 || 251,247 || 1%|| 14.3%
|-
|&nbsp; 1 || 446,275 || 0.4%|| 9.9%
|-
| No indication identified || 701,266 || 0.1%|| 4.7%
|-
|'''Total'''||'''1,630,807'''||'''1.1%'''||'''100.0%'''
|}
Source: Šumilo et al. 2018<ref name="Šumilo_2018" />

=== Financial incentives ===
According to a study from 2009, surgery rates on average increase by 78% when surgeons are paid [[fee-for-service]] reimbursements instead of a fixed salary.<ref>{{cite journal|vauthors=Shafrin J|date=May 2010|title=Operating on commission: analyzing how physician financial incentives affect surgery rates|journal=Health Economics|volume=19|issue=5|pages=562–80|doi=10.1002/hec.1495|pmid=19399752|hdl=10.1002/hec.1495|hdl-access=free}}</ref> Regarding tonsillectomy, a 1968 Canadian study pointed out that ENT specialists working on a fee-for-service programme were twice as likely to perform a tonsillectomy than those who were not.<ref>{{Cite journal|last=Naylor|first=N. L.|title=Tonsillectomy and Adenoidectomy: A Review of the Literature|journal=Can Fam Physician|volume=1977 Sep; 23|pages=113, 115–117|pmc=2378727|year=1977|pmid=21304842}}</ref><ref>{{cite journal|vauthors=Hastings JE, Mott FD, Hewitt D, Barclay A|date=July 1970|title=An interim report on the Sault Ste. Marie study: a comparison of personal health services utilization. A joint Canada-World Health Organization Project|journal=Canadian Journal of Public Health|volume=61|issue=4|pages=289–96|pmid=5451974}}</ref> In 2009 then [[Barack Obama|US President Obama]] remarked:
{{blockquote|Right now, doctors, a lot of times, are forced to make decisions based on the fee payment schedule that's out there. So if they're looking and – and you come in and you've got a bad sore throat, or your child has a bad sore throat, or has repeated sore throats, the doctor may look at the reimbursement system and say to himself, "You know what? I make a lot more money if I take this kid's tonsils out." Now, that may be the right thing to do. But I'd rather have that doctor making those decisions just based on whether you really need your kid's tonsils out or whether it might make more sense just to change – maybe they have allergies. Maybe they have something else that would make a difference.<ref>{{Cite news|url=https://www.nytimes.com/2009/07/22/us/politics/22obama.transcript.html|title=Obama's Fifth News Conference|date=22 July 2009|work=The New York Times|access-date=2019-01-05|language=en-US|issn=0362-4331}}</ref>}}

==History==
[[File:BLW Tonsil Guillotine.jpg|thumb|Tonsil guillotine.]]
Tonsillectomies have been practiced for over 2,000 years, with varying popularity over the centuries.<ref name="McNeill1960">{{cite journal | vauthors = McNeill RA | title = A History of Tonsillectomy: Two Millennia of Trauma, Haemorrhage and Controversy | journal = The Ulster Medical Journal | volume = 29 | issue = 1 | pages = 59–63 | date = June 1960 | pmid = 20476427 | pmc = 2384338 }}</ref> The earliest mention of the procedure is in "Hindu medicine" from about 1000 [[BCE]]. Roughly a millennium later, the [[Ancient Rome|Roman]] aristocrat [[Aulus Cornelius Celsus]] (25 BCE–50 [[Common Era|CE]]) described a [[Surgery in Ancient Rome|procedure]] whereby using the finger (or a blunt hook if necessary), the tonsil was separated from the neighboring tissue before being cut out.<ref name="McNeill1960" /> [[Galen]] (121–200 CE) was the first to advocate the use of the surgical instrument known as the [[snare device|snare]], a practice that was to become common until [[Aëtius Amidenus|Aetius]] (490 CE) recommended partial removal of the tonsil, writing "Those who extirpate the entire tonsil remove, at the same time, structures that are perfectly healthy, and, in this way, give rise to serious Hæmorrhage".<ref name="McNeill1960" /> In the 7th century [[Paulus Aegineta]] (625–690) described a detailed procedure for tonsillectomy, including dealing with the inevitable post-operative bleeding. 1,200 years pass before the procedure is described again with such precision and detail.<ref name="McNeill1960" />

The [[Middle Ages]] saw tonsillectomy fall into disfavor; [[Ambroise Pare]] (1509) wrote it to be "a bad operation" and suggested a procedure that involved gradual strangulation with a [[ligature (medicine)|ligature]]. This method was not popular with the patients due to the immense pain it caused and the infection that usually followed. Scottish physician [[Peter Lowe (surgeon)|Peter Lowe]] in 1600 summarized the three methods in use at the time, including the ''snare'', the ''ligature'', and the ''excision''.<ref name="McNeill1960" /> At the time, the function of the tonsils was thought to be absorption of [[secretion]]s from the nose; it was assumed that removal of large amounts of tonsillar tissue would interfere with the ability to remove these secretions, causing them to accumulate in the [[larynx]], resulting in [[Hoarse voice|hoarseness]]. For this reason, physicians like [[Dionis]] (1672) and [[Lorenz Heister]] censured the procedure.{{citation needed|date=November 2018}}

In 1828, physician [[Philip Syng Physick]] modified an existing instrument originally designed by [[Benjamin Bell]] for removing the [[uvula]]; the instrument, known as the tonsil guillotine (and later as a [[tonsillotome]]), became the standard instrument for tonsil removal for over 80 years.<ref name="McNeill1960" /> By 1897, it became more common to perform complete rather than partial removal of the tonsil after American physician Ballenger noted that partial removal failed to completely alleviate symptoms in a majority of cases. His results using a technique involving removal of the tonsil with a scalpel and forceps were much better than partial removal; tonsillectomy using the guillotine eventually fell out of favor in America.<ref name="McNeill1960" />

In the beginning of the 20th century, tonsillectomy became more common in the United Kingdom and the United States and by the 1930s was very common in both countries.<ref name=":0">{{Cite journal|last=Dwyer-Hemmings|first=L.|title='A Wicked Operation'? Tonsillectomy in Twentieth-Century Britain|journal=Med. Hist.|volume=62|issue=2|pages=217–241|pmc=5883156|year=2018|pmid=29553012|doi=10.1017/mdh.2018.5}}</ref> For example, a study conducted in 1934 found that 61% of 1,000 New York schoolchildren had been tonsillectomized; doctors recommended surgery for all but 65 of the remaining children.<ref name=":5">{{Cite web|url=https://www.latimes.com/archives/la-xpm-2001-may-28-he-3467-story.html|title=Why More Children Are Keeping Their Tonsils|date=2001-05-28|website=Los Angeles Times|language=en-US|access-date=2019-10-02}}</ref> Complications were often simply accepted.<ref name=":0" /> The medical community considered enlarged tonsils a disease, attributing their enlargement to infection rather than a [[Physiology|physiologic response]].<ref name=":2">{{Cite book|url=https://books.google.com/books?id=ORyJr1P7uGgC&pg=PA815|title=Oxford Illustrated Companion to Medicine|publisher=Oxford University Press/Books.|year=2001|isbn=978-0-19-262950-0|pages=815|language=en}}</ref> Because of the [[Focal infection theory|theory of focal infection]], many surgeons believed that not only enlarged tonsils, but all tonsils should be removed.<ref name=":2" /><!-- "Fourth, by the second decade of the 20th century, the theory of focal infection was gaining ground, leading to the belief that tonsils were a breeding ground for bacteria."; "For many, the argument shifted from whether all enlarged tonsils should be removed to whether all tonsils should be removed." --> In the 1940s tonsillectomy became controversial as several studies linked it to [[bulbar poliomyelitis]].<ref name=":0" /> From the 1940s to 1970s, further studies found an association between tonsillectomy and bulbar poliomyelitis with recommendations not to do the operation during outbreaks.<ref>{{Cite journal|last=Mawdsley|first=Stephen E.|date=26 July 2014|title=Polio provocation: solving a mystery with the help of history|journal=The Lancet|language=en|volume=384|issue=9940|pages=300–301|doi=10.1016/S0140-6736(14)61251-4|pmid=25072064|s2cid=5161486|issn=0140-6736|doi-access=free}}</ref><ref>{{Cite news|url=https://www.who.int/ihr/polio1993en.pdf|title=The Immunological Basis for Immunization Series Module 6: Poliomyelitis|access-date=20 June 2019}}</ref><ref>{{Cite web|url=https://lci.rivm.nl/richtlijnen/polio|title=Polio {{!}} LCI richtlijnen|website=LCI richtlijnen|language=nl|access-date=2019-07-07}}</ref><ref>{{Cite journal |last1=Kohanzadeh |first1=Avraham |last2=Somogyi |first2=Dafna Z. |last3=Kravitz |first3=Meryl B. |date=2022-08-19 |title=Tonsillectomy and poliomyelitis: Development of causality |url=https://www.sciencedirect.com/science/article/pii/S0165587622002518 |journal=International Journal of Pediatric Otorhinolaryngology |volume=162 |language=en |pages=111290 |doi=10.1016/j.ijporl.2022.111290 |pmid=36067711 |s2cid=251706895 |issn=0165-5876}}</ref> Controversy surrounding tonsillectomy increased further in the United Kingdom in the 1960s because of the financial costs associated with the number of surgeries being performed and because of unexplainable variations in tonsillectomy rates between geographic regions and between [[social class]]es.<ref name=":0" /> In the media, tonsillectomy was criticised for being "fashionable" or a "[[status symbol]]".<ref name=":0" /> There was also an increasing concern regarding the psychological and physical suffering of young children as a result of surgery.<ref name=":2" /> Furthermore, opponents of surgery argued that the tonsils should be retained whenever possible because of their role in the immune system and that the benefits of surgery were marginal.<ref name=":2" /> In the 1970s, tonsillectomy rates in the United Kingdom started to decline after several studies concluded that tonsillectomy was not as effective for sore throats and many other indications as previously thought.<ref name=":0" /> <!-- Quote = That year a 'select meeting of experts' concluded that only a small minority of tonsillectomies were truly necessary. -->

Tonsillectomy rates in the United States have declined since 1978, when experts of the [[National Institutes of Health]] concluded that there was insufficient evidence that the benefits of tonsillectomy outweighed the risks and therefore recommended more research, which subsequently led to stricter guidelines.<ref name=":5" />

As doctors took a more conservative approach towards tonsillectomy, parental pressure became one of the most important reasons for surgery.<ref name=":2" />


== References ==
== References ==
{{Reflist}}
* {{anb|Avior}} {{Journal reference issue | Author=Avior G, Fishman G, Leor A, Sivan Y, Kaysar N, Derowe A | Title=The effect of tonsillectomy and adenoidectomy on inattention and impulsivity as measured by the Test of Variables of Attention (TOVA) in children with obstructive sleep apnea syndrome | Journal=Otolaryngol Head Neck Surg | Year=2004 | Pages=367-71 | Volume=131 | Issue=4 }} PMID 15467601
* {{anb|Ray}} {{Journal reference issue | Author=Ray RM, Bower CM | Title=Pediatric obstructive sleep apnea: the year in review | Journal=Curr Opin Otolaryngol Head Neck Surg | Year=2005 | Pages=360-5 | Volume=13 | Issue=6 }} PMID 16282765
* {{anb|Windfuhr}} {{Journal reference issue | Author=Windfuhr JP, Chen YS, Remmert S | Title=Hemorrhage following tonsillectomy and adenoidectomy in 15,218 patients | Journal=Otolaryngol Head Neck Surg | Year=2005 | Pages=281-6 | Volume=132 | Issue=2 }} PMID 15692542


== External links ==
== External links ==
{{commons category}}
* aaohns.org, [http://aaohns.org/healthinfo/throat/tonsils.cfm Insight Into Tonsillectomy and Adenoidectomy]
*[http://www.entnet.org/HealthInformation/tonsillectomyProcedures.cfm Tonsillectomy Procedures] {{Webarchive|url=https://web.archive.org/web/20080705102609/http://www.entnet.org/HealthInformation/tonsillectomyProcedures.cfm |date=5 July 2008 }}
*[https://www.scribd.com/full/27709493?access_key=key-2dietfgd7y5jsmla9vpx History of tonsillectomy]
*{{cite journal | title = Clinical UM Guideline CG-SURG-30: Tonsillectomy for Children | url = http://www.bcbsga.com/medicalpolicies/guidelines/gl_pw_c148461.htm | journal = Blue Cross Blue Shield Association of Georgia }}

{{Operations and other procedures on the nose, mouth, and pharynx}}


[[Category:Surgery]]
[[Category:Surgical removal procedures]]
[[Category:Surgical removal procedures]]
[[Category:Tonsil]]
[[Category:Sleep surgery]]
[[Category:Otorhinolaryngology]]

Latest revision as of 08:47, 11 November 2024

Tonsillectomy
Typical appearance of the back of the throat three days post tonsillectomy.
Other namesAdenotonsillectomy, T&A
ICD-9-CM28.2-28.3
MeSHD014068
MedlinePlus003013

Tonsillectomy is a surgical procedure in which both palatine tonsils are fully removed from the back of the throat.[1] The procedure is mainly performed for recurrent tonsillitis, throat infections and obstructive sleep apnea (OSA).[1] For those with frequent throat infections, surgery results in 0.6 (95% confidence interval: 1.0 to 0.1) fewer sore throats in the following year, but there is no evidence of long term benefits.[1][2] In children with OSA, it results in improved quality of life.[3]

While generally safe, complications may include bleeding, vomiting, dehydration, trouble eating, and trouble talking.[1] Throat pain typically lasts about one to two weeks after surgery.[1][4] Bleeding occurs in about 1% within the first day and another 2% after that.[1] Between 1 in 2,360 and 1 in 56,000 procedures cause death.[1] Tonsillectomy does not appear to affect long term immune function.[1][5]

Following the surgery, ibuprofen and paracetamol (acetaminophen) may be used to treat postoperative pain.[1] The surgery is often done using metal instruments or electrocautery.[1][6] The adenoid may also be removed or shaved down, in which case it is known as an "adenotonsillectomy".[1] The partial removal of the tonsils is called a "tonsillotomy", which may be preferred in cases of OSA.[1][7][8][9]

The surgery has been described since at least as early as 50 AD by Celsus.[10] In the United States, as of 2010, tonsillectomy is performed less frequently than in the 1970s although it remains the second most common outpatient surgical procedure in children.[1] The typical cost when done as an inpatient in the United States is US$4,400 as of 2013.[11] There is some controversy as of 2019 as to when the surgery should be used.[1][2] There are variations in the rates of tonsillectomy between and within countries.[12][13]

Medical uses

[edit]

Tonsillectomy is mainly undertaken for sleep apnea and recurrent or chronic tonsillitis.[1] It is also carried out for peritonsillar abscess, periodic fever, aphthous stomatitis, pharyngitis and adenitis (PFAPA), guttate psoriasis, nasal airway obstruction, tonsil cancer and diphtheria carrier state. For children, tonsillectomy is usually combined with the removal of the adenoid. However, it is unclear whether the removal of the adenoid has any additional positive or negative effects for the treatment of recurrent sore throat.[2] In cases of chronic tonsillitis in adults, there is strong evidence of increased quality of life, reduction of symptoms, and economic benefit.[14][15][16] A randomised controlled trial of tonsillectomy versus medical treatment (antibiotics and pain killers) in adults with frequent tonsillitis found that tonsillectomy was more effective and cost effective. It resulted in fewer days with sore throat.[17][18]

Sore throat

[edit]

Surgery is not recommended for those with fewer than seven documented throat infections in the last year, fewer than five each year for the last two years, or fewer than three each year for three years.[1] Severely affected children who undergo surgery on average have one fewer sore throat per year in the subsequent one or two years, compared to those who do not.[1][2][19] Specifically one review of five randomized controlled trials, found a decrease from 3.6 to 3.0 episodes in the year following surgery.[2] In less severely affected children, surgery results in an increase, rather than a decrease of sore throats when the sore throat directly following surgery is included.[2] Surgery results in a reduction in school absence in the following year, but the strength of evidence is low.[19] Surgery does not result in an improvement in the quality of life.[19] Benefits of surgery do not persist over time.[1][19] Those with frequent throat infections often spontaneously improve over a year without surgery.[1][2] Therefore, a certain number of people who undergo surgery will do so unnecessarily as they would not have had further episodes of tonsillitis had they not had surgery.[2] Evidence in adults is unclear.[2]

In 2019, the American Academy of Otolaryngology & Head and Neck Surgery (AAO-HNS) recommended:

Caregivers and patients who meet the appropriate criteria for tonsillectomy as described here should be advised of only modest anticipated benefits of tonsillectomy, as weighed against the natural history of resolution with watchful waiting, as well as the risk of surgical morbidity and complications and the unknown risk of general anesthesia exposure in children [younger than] four years of age. In considering the potential harms, the guideline panel agreed that there was not a clear preponderance of benefit over harm for tonsillectomy, even for children meeting the Paradise criteria [seven episodes in the past year, five episodes per year in the past two years, or three episodes per year in the past three years]. Instead, the group felt there to be a balance that allows either tonsillectomy or watchful waiting as an appropriate management option for these children and does not imply that all qualifying children should have surgery. The role of tonsillectomy as an option in managing children with recurrent throat infection means that there is a substantial role for shared decision making with the child's caregiver and primary care clinician.[1]

Many cases of the sore throat have other causes than tonsillitis and tonsillectomy is therefore not indicated for those cases.[2][19] The diagnosis of tonsillitis is often made without testing for bacteria.[19] The UK National Health Service states that it is very rare that someone needs to have their tonsils taken out, and it is usually only necessary in case of severe tonsillitis that keeps recurring.[20]

Obstructive sleep apnea

[edit]

Tonsillectomy improves obstructive sleep apnea (OSA) in most children.[1] A 2015 Cochrane review found moderate quality evidence for benefits in terms of quality of life and symptoms but no benefit in attention or academic performance.[3] It recommended that physicians and parents should weigh the benefits and risks of surgery as OSA symptoms may spontaneously resolve over time.[3] An AHRQ review however did find improvements at school.[1] The procedure is recommended for those who have OSA that has been verified by a sleep study.[1] Studies have shown that treatment success of uvulopalatopharyngoplasty with tonsillectomy increases with tonsil size.[21]

Other

[edit]

There is no good evidence for other uses such as tonsil stones, bad breath, trouble swallowing, and an abnormal voice in children.[1]

Complications

[edit]

While generally safe, tonsillectomy may result in several complications, some of which are serious.[1][2] Complications are divided into primary (first 24 hours after surgery), and secondary (after 24 hours), with bleeding being the most common complication. Other common complications are postoperative nausea and vomiting, dehydration, trouble eating, ear pain, taste dysfunction and trouble talking.[1][22] In rare cases, tonsillectomy may also cause damage to the teeth (because of the clamp that is placed in the mouth during surgery), larynx and pharyngeal wall, aspiration, respiratory compromise, laryngospasm, laryngeal edema and cardiac arrest.[1] Throat pain typically lasts about one to two weeks after surgery.[1][6]

Significant post-operative primary bleeding occurs in 0.2–2.2% of people, and secondary bleeding in 0.1–3.3%.[1] In several reported case series, the rate of post tonsillectomy bleeding ranged from 2.0% to 7.0%.[23][24][25] Also in veterinary surgery, bleeding was a common complication.[26] A meta-analysis reported that frequency of bleeding after tonsillectomy across different techniques did not differ.[25]

It is estimated 1.3% of people will have a delayed discharge (of 4 to 24 hours) due to a complication, and up to 3.9% will require repeat admission to hospital. The main reasons for either keeping a person in hospital, or readmitting them after tonsillectomy are uncontrolled pain, vomiting, fever, or bleeding. Death occurs as a result in between 1 in 2,360 and 56,000 procedures.[1] Bleeding accounts for one-third of deaths.[1] As the procedure is done under general anesthesia, there are anesthesia risks.[1]

Immune system

[edit]

There is no evidence tonsillectomy affects long term immune function.[1][5] It does not appear to affect the long term risk of infections in other areas of the body.[27] Some studies have found small changes in immunoglobulin concentrations after tonsillectomy but these are of unclear significance.[1] Tonsillectomy is a risk factor for Crohn's disease.[28][29] A 2024 meta-analysis found that tonsillectomy is associated with Crohn's disease and ulcerative colitis, with an odds ratio of 1.93 and 1.24, respectively.[29] There is an association suggesting an increase in the risk of developing multiple sclerosis if done before the age of 20.[30] A meta-analysis published in 2020 indicated a statistically significant association between a history of tonsillectomy and the development of Hodgkin's disease.[31] A meta-analysis from 2022 concluded that a history of tonsillectomy is associated with an increased risk of breast cancer.[32] The relationship between childhood tonsillectomy and the development of other cancer types in adulthood remains unclear.[33]

Surgical procedure

[edit]
Cryptic tonsils immediately following surgical removal (bilateral tonsillectomy).
Throat 1 day after a tonsillectomy.
Throat some days after a tonsillectomy.

For the past 50 years at least, tonsillectomy has been performed by dissecting the tonsil from its surrounding fascia, a so-called total, or extra-capsular tonsillectomy. Problems including pain and bleeding led to a recent resurgence in interest in sub-total tonsillectomy or tonsillotomy, which was popular 60 to 100 years ago, in an effort to reduce these complications.[34] The generally accepted procedure for 'total' tonsillectomy uses a scalpel and blunt dissection, electrocautery, or diathermy.[35] Harmonic scalpels or lasers have also been used. Bleeding is stopped with electrocautery, ligation by sutures, and the topical use of thrombin, a protein that induces blood clotting. The most effective surgical approach has not been well studied.[35]

It is not known whether the benefits of subtotal tonsillectomy in obstructive sleep apnea are enduring. But this is also the case for tonsillectomy for sleep apnea. There have been no randomised controlled trials of long term effectiveness of tonsillectomy for sleep apnea.[3]

Methods

[edit]

The scalpel is the preferred surgical instrument of many ear, nose, and throat specialists. However, there are other techniques and a brief review of each follows:

  • Dissection and snare method: Removal of the tonsils by use of a forceps and scissors with a wire loop called a snare was formerly the most common method practiced by otolaryngologists, but has been largely replaced in favor of other techniques.[citation needed] The procedure requires the patient to undergo general anesthesia; the tonsils are completely removed and the remaining tissue surface is cauterized. The patient will leave with minimal post-operative bleeding.
  • Electrocautery: Electrocautery uses electrical energy to separate the tonsillar tissue and assists in reducing blood loss through cauterization. Research has shown that the heat of electrocautery (400 °C) may result in thermal injury to surrounding tissue. This may result in more discomfort during the postoperative period.
  • Radiofrequency ablation: Monopolar radiofrequency thermal ablation transfers radiofrequency energy to the tonsil tissue through probes inserted in the tonsil. The procedure can be performed in an office (outpatient) setting under light sedation or local anesthesia. After the treatment is performed, scarring occurs within the tonsil causing it to decrease in size over a period of several weeks. The treatment can be performed several times. The advantages of this technique are minimal discomfort, ease of operations, and immediate return to work or school. Tonsillar tissue remains after the procedure but is less prominent. This procedure is recommended for treating enlarged tonsils and not chronic or recurrent tonsillitis.
  • Coblation tonsillectomy: This surgical procedure is performed using plasma to remove the tonsils. Coblation technology combines radiofrequency energy and saline to create a plasma field. The plasma field is able to dissociate molecular bonds of target tissue while remaining relatively cool (40–70 °C),[36] which results in minimal or no damage to surrounding healthy tissue. A Coblation tonsillectomy is carried out in an operating room setting, with the patient under general anesthesia. Tonsillectomies are generally performed for two main reasons: tonsillar hypertrophy (enlarged tonsils) and recurrent tonsillitis. It has been claimed that this technique results in less pain, faster healing, and less post operative care.[37] However, review of 21 studies gives conflicting results about levels of pain, and its comparative safety has yet to be confirmed.[38] This technique has been criticized for a higher than expected rate of bleeding presumably due to the low temperature which may be insufficient to seal the divided blood vessels but several papers offer conflicting (some positive, some negative) results. More recent studies of coblation tonsillectomy indicate reduced pain and ostalgia;[39] less intraoperative or postoperative complications;[40] lesser incidence of delayed hemorrhage, more significantly in pediatric populations,[41][42][43] less postoperative pain and early return to daily activities, fewer secondary infections of the tonsil bed and significantly lower rates of secondary hemorrhage.[44] Unlike the electrosurgery procedure, Coblation Tonsillectomy generates significantly lower temperatures on contacted tissue.[45] Long-term studies seem to show that surgeons experienced with the technique have very few complications.
  • Harmonic scalpel: This medical device uses ultrasonic vibrating of its blade at a frequency of 55 kHz. Invisible to the naked eye, the vibration transfers energy to the tissue, providing simultaneous cutting and coagulation. The temperature of the surrounding tissue reaches 80 °C. Proponents of this procedure assert that the result is precise cutting with minimal thermal damage.
  • Thermal Welding: A new technology which uses pure thermal energy to seal and divide the tissue. The absence of thermal spread means that the temperature of surrounding tissue is only 2–3 °C higher than normal body temperature. Clinical papers show patients with minimal post-operative pain (no requirement for narcotic pain-killers), zero edema (swelling) plus almost no incidence of bleeding. Hospitals in the US are advertising this procedure as "Painless Tonsillectomy". Also known as Tissue Welding.
  • Carbon dioxide laser: When a laser is used to perform tonsillectomy, it can be under local anaesthetic with anaesthetic spray only, called tonsillotomy (or tonsil resurfacing or partial tonsillectomy), or it can be performed under general anaesthetic when it is called intra-capsular tonsillectomy, using an operating microscope for magnification. The carbon dioxide laser in scanning mode is an excellent vapouriser of tissue, and in conjunction with a computerised pattern generator and operating microscope with micromanipulator, it can result in near total removal of tonsil tissue whilst preserving the capsule of the tonsil. This leads to a significantly reduced bleeding and pain rate.[46] The local anaesthetic technique takes around 10 minutes, the general around 20 minutes depending on the size of the tonsils - the bigger they are, the longer it takes. The general anaesthetic operation has a revision rate of 1:50, the local anaesthetic tonsillotomy 1:4.5. This is different from procedures where a laser is used to reduce or resurface the tonsils (e.g. laser cryptolysis). Providing the absence of certain contra-indications such as sensitive gag reflex, LAST can be performed under local anesthetic as an outpatient procedure. A carbon dioxide laser is commonly used, and is swept over each tonsil 8–10 times. The smoke is aspirated out of the mouth to prevent smoke inhalation. Often, more than one procedure is required, each lasting about 20 minutes. Due to the frequent requirement for multiple sessions, this treatment may work out more expensive than a single session tonsillectomy. A degree of patient compliance is required, making it unsuitable for young children and anxious persons, who risk harm if they move during the procedure.[47]
  • Microdebrider: The microdebrider is a powered rotary shaving device with continuous suction often used during sinus surgery. It is made up of a cannula or tube, connected to a hand piece, which in turn is connected to a motor with foot control and a suction device. The endoscopic microdebrider is used in performing a partial tonsillectomy, by partially shaving the tonsils. This procedure entails eliminating the obstructive portion of the tonsil while preserving the tonsillar capsule. A natural biologic dressing is left in place over the pharyngeal muscles, preventing injury, inflammation, and infection. The procedure results in less post-operative pain, a more rapid recovery, and perhaps fewer delayed complications. However, the partial tonsillectomy is suggested for enlarged tonsils—not those that incur repeated infections.[citation needed]

Medications

[edit]

A single dose of the corticosteroid drug dexamethasone may be given during surgery to prevent post-operative vomiting.[48] A dose of dexamethasone during surgery prevents vomiting in one out of every five children. A dose of dexamethasone may help children return to a normal diet more quickly and have less post-operative pain.[48] Many people are prescribed antibiotics following a tonsillectomy, however, the benefits and potential harms have not been well studied.[49] Antibiotics are not suggested to be used routinely following tonsillectomy.[49]

Post-surgery care

[edit]

A sore throat will persist approximately two weeks following surgery while pain following the procedure is significant and may necessitate a hospital stay.[50] Recovery can take from 7 to 10 days and proper hydration is very important during this time, since dehydration can increase throat pain, leading to a circle of poor fluid intake.[51][52] Tonsillectomy appears to be more painful in adults than children.[53] Controlling the pain following tonsillectomy is important to ensure that people can start eating again normally following the procedure.[54]

At some point, most commonly 7 to 11 days after the surgery (but occasionally as long as two weeks after), bleeding can occur when scabs begin sloughing off from the surgical sites. The overall risk of bleeding is approximately 1–2%. It is higher in adults, especially males over age 70 and three-quarters of bleeding incidents occur on the same day as the surgery.[55] Approximately 3% of adults develop bleeding at this time which may sometimes require surgical intervention.

Recommendations for pain management include ibuprofen and paracetamol (acetaminophen).[1] The opioid codeine is not recommended for those less than 12 years old.[1] There is a theoretical concern that NonSteroidal Anti-Inflammatory Drugs (NSAIDs) may increase the risk of bleeding but evidence does not support such a risk.[56] Further research is required to determine if mouth rinses, mouthwashes and sprays help improve recovery following surgery.[57]

Some surgeons recommend starting with a soft diet for two weeks before advancing to normal diet. This is to prevent any sharp foods from potentially irritating the tonsillar fossae during the healing stage and provoking a bleed.

Rates

[edit]

There are variations in tonsillectomy rates, both between and within countries.[12][13] In 2015, tonsillectomy rates in the Netherlands, Belgium, Finland and Norway were at least twice those in the UK but rates in Spain, Italy and Poland were at least a quarter lower.[12] Tonsillectomy rates even vary considerably between neighbouring countries. For example, rates in Croatia are three times those in Slovenia.[12] Variations between countries may be explained by a lack of or differences between guidelines.[9] However differences in guidelines cannot explain the seven-fold variation between local authority areas within England.[13]

In Germany tonsillectomy rates between regions differ by up to a factor of 8.[9] A 2010 study in England found the annual tonsillectomy rate per 100,000 between 2000 and 2005 was 754 in the highest region, the national average was 304 and the lowest region was 102.[13] This means there is a seven-fold difference between the region with the highest tonsillectomy rate and the region with the lowest one.[13] In 2006, English Chief Medical Officer Liam Donaldson revealed that unnecessary tonsillectomies and unnecessary hysterectomies combined cost the British National Health Service 21 million pounds a year.[58]

The rise in adenotonsillectomies for sleep apnea in the USA has been greater than the decline in tonsillectomies for sore throat.[59]

Evidence-based indications

[edit]

In 2018, a study of the medical records of 1.6 million UK children found 15,760 had sufficient sore throats to justify tonsillectomy and 13.6% (2,144) underwent surgery.[60] The same study found 18,281 children who had undergone tonsillectomy, and of these only 11.7% (2,144) had evidence-based indications (i.e. frequent enough sore throats to justify surgery).[60] The majority of tonsillectomies were undertaken for indications which did not have an evidence-base: five to six sore throats in one year (12.4%), two to four sore throats in one year (44.6%), sleep disordered breathing (12.3%), or obstructive sleep apnea (3.9%).[60] In the UK therefore, most children who undergo tonsillectomy probably do not benefit and most children who might benefit do not undergo tonsillectomy.[60] The study concluded that 32,500 (close to 90%) out of the 37,000 children who have their tonsils removed annually "are unlikely to benefit" and that surgery therefore may do more harm than good to those children.[60] Tonsillectomy rates are lower in the UK than in most other western European countries.[12]

Table: Numbers of children (from 1.6 million children between 2005 and 2016 in the UK) identified with possible indications for tonsillectomy and the numbers who subsequently undergo tonsillectomy.

Condition which might be considered an indication for tonsillectomy Number of children
consulting with
this indication
Proportion with
this indication
undergoing
tonsillectomy
Proportion of all
tonsillectomies
attributable to
this indication
Tonsillar tumour 5 0% 0.0%
Aphthous stomatitis, pharyngitis & cervical adenitis syndrome 435 3.4% 0.1%
Paradise criteria 15,320 13.9% 11.6%
Obstructive sleep apnea 3,185 22.2% 3.9%
Other sleep disordered breathing 15,205 14.8% 12.3%
Peritonsillar abscess 675 14.8% 0.5%
Recurrent sore throats / tonsillitis (episodes per year):
  5 to 6 25,420 8.9% 12.4%
  3 to 4 170,687 3.2% 30.1%
  2 to 4 with guttate / chronic psoriasis 939 3.7% 0.2%
  2 to 4 with glomerulonephritis 148 4.7% 0.0%
  2 251,247 1% 14.3%
  1 446,275 0.4% 9.9%
No indication identified 701,266 0.1% 4.7%
Total 1,630,807 1.1% 100.0%

Source: Šumilo et al. 2018[60]

Financial incentives

[edit]

According to a study from 2009, surgery rates on average increase by 78% when surgeons are paid fee-for-service reimbursements instead of a fixed salary.[61] Regarding tonsillectomy, a 1968 Canadian study pointed out that ENT specialists working on a fee-for-service programme were twice as likely to perform a tonsillectomy than those who were not.[62][63] In 2009 then US President Obama remarked:

Right now, doctors, a lot of times, are forced to make decisions based on the fee payment schedule that's out there. So if they're looking and – and you come in and you've got a bad sore throat, or your child has a bad sore throat, or has repeated sore throats, the doctor may look at the reimbursement system and say to himself, "You know what? I make a lot more money if I take this kid's tonsils out." Now, that may be the right thing to do. But I'd rather have that doctor making those decisions just based on whether you really need your kid's tonsils out or whether it might make more sense just to change – maybe they have allergies. Maybe they have something else that would make a difference.[64]

History

[edit]
Tonsil guillotine.

Tonsillectomies have been practiced for over 2,000 years, with varying popularity over the centuries.[65] The earliest mention of the procedure is in "Hindu medicine" from about 1000 BCE. Roughly a millennium later, the Roman aristocrat Aulus Cornelius Celsus (25 BCE–50 CE) described a procedure whereby using the finger (or a blunt hook if necessary), the tonsil was separated from the neighboring tissue before being cut out.[65] Galen (121–200 CE) was the first to advocate the use of the surgical instrument known as the snare, a practice that was to become common until Aetius (490 CE) recommended partial removal of the tonsil, writing "Those who extirpate the entire tonsil remove, at the same time, structures that are perfectly healthy, and, in this way, give rise to serious Hæmorrhage".[65] In the 7th century Paulus Aegineta (625–690) described a detailed procedure for tonsillectomy, including dealing with the inevitable post-operative bleeding. 1,200 years pass before the procedure is described again with such precision and detail.[65]

The Middle Ages saw tonsillectomy fall into disfavor; Ambroise Pare (1509) wrote it to be "a bad operation" and suggested a procedure that involved gradual strangulation with a ligature. This method was not popular with the patients due to the immense pain it caused and the infection that usually followed. Scottish physician Peter Lowe in 1600 summarized the three methods in use at the time, including the snare, the ligature, and the excision.[65] At the time, the function of the tonsils was thought to be absorption of secretions from the nose; it was assumed that removal of large amounts of tonsillar tissue would interfere with the ability to remove these secretions, causing them to accumulate in the larynx, resulting in hoarseness. For this reason, physicians like Dionis (1672) and Lorenz Heister censured the procedure.[citation needed]

In 1828, physician Philip Syng Physick modified an existing instrument originally designed by Benjamin Bell for removing the uvula; the instrument, known as the tonsil guillotine (and later as a tonsillotome), became the standard instrument for tonsil removal for over 80 years.[65] By 1897, it became more common to perform complete rather than partial removal of the tonsil after American physician Ballenger noted that partial removal failed to completely alleviate symptoms in a majority of cases. His results using a technique involving removal of the tonsil with a scalpel and forceps were much better than partial removal; tonsillectomy using the guillotine eventually fell out of favor in America.[65]

In the beginning of the 20th century, tonsillectomy became more common in the United Kingdom and the United States and by the 1930s was very common in both countries.[66] For example, a study conducted in 1934 found that 61% of 1,000 New York schoolchildren had been tonsillectomized; doctors recommended surgery for all but 65 of the remaining children.[67] Complications were often simply accepted.[66] The medical community considered enlarged tonsils a disease, attributing their enlargement to infection rather than a physiologic response.[68] Because of the theory of focal infection, many surgeons believed that not only enlarged tonsils, but all tonsils should be removed.[68] In the 1940s tonsillectomy became controversial as several studies linked it to bulbar poliomyelitis.[66] From the 1940s to 1970s, further studies found an association between tonsillectomy and bulbar poliomyelitis with recommendations not to do the operation during outbreaks.[69][70][71][72] Controversy surrounding tonsillectomy increased further in the United Kingdom in the 1960s because of the financial costs associated with the number of surgeries being performed and because of unexplainable variations in tonsillectomy rates between geographic regions and between social classes.[66] In the media, tonsillectomy was criticised for being "fashionable" or a "status symbol".[66] There was also an increasing concern regarding the psychological and physical suffering of young children as a result of surgery.[68] Furthermore, opponents of surgery argued that the tonsils should be retained whenever possible because of their role in the immune system and that the benefits of surgery were marginal.[68] In the 1970s, tonsillectomy rates in the United Kingdom started to decline after several studies concluded that tonsillectomy was not as effective for sore throats and many other indications as previously thought.[66]

Tonsillectomy rates in the United States have declined since 1978, when experts of the National Institutes of Health concluded that there was insufficient evidence that the benefits of tonsillectomy outweighed the risks and therefore recommended more research, which subsequently led to stricter guidelines.[67]

As doctors took a more conservative approach towards tonsillectomy, parental pressure became one of the most important reasons for surgery.[68]

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