Collagenous colitis: Difference between revisions
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| caption = [[Micrograph]] of collagenous colitis. [[H&E stain]]. |
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| field = [[Gastroenterology]] |
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'''Collagenous colitis''' is an [[Inflammation|inflammatory]] condition of the [[Colon (anatomy)|colon]]. Together with the related condition [[lymphocytic colitis]], it is a subtype of [[microscopic colitis]], which is characterized by inflammation that specifically affects the colon (i.e. [[colitis]]), and a clinical presentation that involves watery [[diarrhea]] but a lack of [[rectal bleeding]]. Microscopic colitis does not usually cause [[macroscopic]] changes to the colon that allow a visual diagnosis during [[colonoscopy]], instead causing [[Microscopic scale|microscopic]] changes that can be detected through [[Histopathology|histopathological]] examination of colonic [[Biopsy|biopsies]]. The nature of these microscopic changes is what differentiates collagenous from lymphocytic colitis, with the characteristic finding in collagenous colitis being depositions of [[collagen]] in the [[connective tissue]] between the [[Intestinal gland|colonic glands]].<ref name=":0" /> Collagenous colitis, and microscopic colitis as a whole, is sometimes considered to be an [[inflammatory bowel disease]] (IBD) along with [[Crohn's disease]] and [[ulcerative colitis]]. However, little is known about the [[etiology]] of microscopic colitis, and so the degree of similarity to the inflammatory bowel diseases is uncertain.<ref name=":0">{{Cite journal|last1=Park|first1=Tina|last2=Cave|first2=David|last3=Marshall|first3=Christopher|date=2015-08-07|title=Microscopic colitis: A review of etiology, treatment and refractory disease|journal=World Journal of Gastroenterology|volume=21|issue=29|pages=8804–8810|doi=10.3748/wjg.v21.i29.8804|issn=1007-9327|pmc=4528022|pmid=26269669 |doi-access=free }}</ref><ref name="pmid23864791">{{cite journal| author=Jegadeesan R, Liu X, Pagadala MR, Gutierrez N, Butt M, Navaneethan U| title=Microscopic colitis: is it a spectrum of inflammatory bowel disease? | journal=World J Gastroenterol | year= 2013 | volume= 19 | issue= 26 | pages= 4252–6 | pmid=23864791 | doi=10.3748/wjg.v19.i26.4252 | pmc=3710430 | doi-access=free }}</ref> |
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'''Collagenous colitis''' is an [[inflammatory bowel disease]] affecting the [[Colon (anatomy)|colon]] specifically with peak incidence in the 5th decade of life, affecting [[women]] more than [[men]]. Its clinical presentation involves watery diarrhea, usually in the absence of rectal bleeding. It is often classified under the umbrella entity [[microscopic colitis]], along with a related condition, [[lymphocytic colitis]]. |
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Although cases are known to occur in all age groups, the disease is most frequently diagnosed in late [[middle age]]d or [[elderly]] people, with the average person being diagnosed in their 60s. Women are more frequently affected than men, with different studies finding female-male [[Rate ratio|incidence ratios]] of between 3 and 8. [[Epidemiology|Epidemiological]] studies have found large increases in diagnosed cases of microscopic colitis, of which collagenous colitis cases are a majority, over the past few decades, with cases of microscopic colitis now outnumbering those of Crohn's disease and ulcerative colitis at least in some regions.<ref name="TomeSehga2022">{{cite journal | last1=Tome | first1=June | last2=Sehgal | first2=Kanika | last3=Kamboj | first3=Amrit K. | last4=Harmsen | first4=William S. | last5=Kammer | first5=Patricia P. | last6=Loftus | first6=Edward V. | last7=Tremaine | first7=William J. | last8=Khanna | first8=Sahil | last9=Pardi | first9=Darrell S. | title=The Epidemiology of Microscopic Colitis in Olmsted County, Minnesota: Population-Based Study From 2011 to 2019 | journal=Clinical Gastroenterology and Hepatology | publisher=Elsevier BV | volume=20 | issue=5 | year=2022 | issn=1542-3565 | doi=10.1016/j.cgh.2021.06.027 | pages=1085–1094| pmid=34216819 | pmc=8716639 }}</ref><ref name="WeimersAnkersen2020">{{cite journal | last1=Weimers | first1=Petra | last2=Ankersen | first2=Dorit Vedel | last3=Lophaven | first3=Søren | last4=Bonderup | first4=Ole Kristian | last5=Münch | first5=Andreas | last6=Løkkegaard | first6=Ellen Christine Leth | last7=Burisch | first7=Johan | last8=Munkholm | first8=Pia | title=Incidence and Prevalence of Microscopic Colitis Between 2001 and 2016: A Danish Nationwide Cohort Study | journal=Journal of Crohn's and Colitis | publisher=Oxford University Press (OUP) | volume=14 | issue=12 | date=2020-06-05 | issn=1873-9946 | doi=10.1093/ecco-jcc/jjaa108 | pages=1717–1723| pmid=32502240 | doi-access=free }}</ref> |
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==Signs and symptoms== |
==Signs and symptoms== |
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In general, microscopic colitis causes chronic watery diarrhea with increased stool frequency. Some patients report [[nocturnal]] diarrhea, [[abdominal pain]], bowel urgency, [[fecal incontinence]], [[fatigue]] and weight loss. In severe cases, symptoms may include [[dehydration]] and [[Electrolyte imbalance|electrolyte imbalances]].<ref name="Tome Kamboj Pardi 2021 pp. 1302–1308">{{cite journal | last1=Tome | first1=June | last2=Kamboj | first2=Amrit K. | last3=Pardi | first3=Darrell S. | title=Microscopic Colitis: A Concise Review for Clinicians | journal=Mayo Clinic Proceedings | publisher=Elsevier BV | volume=96 | issue=5 | year=2021 | issn=0025-6196 | doi=10.1016/j.mayocp.2021.03.022 | pages=1302–1308| pmid=33958059 | doi-access=free }}</ref> Patients report a significantly diminished quality of life.<ref name=":0" /><ref name=":1">{{Cite journal|last=O’Toole|first=Aoibhlinn|date=2016-02-10|title=Optimal management of collagenous colitis: a review|journal=Clinical and Experimental Gastroenterology|volume=9|pages=31–39|doi=10.2147/CEG.S67233|issn=1178-7023|pmc=4754103|pmid=26929656 |doi-access=free }}</ref> In a retrospective study specifically on collagenous colitis patients, all studied patients experienced chronic diarrhea, 42% experienced weight loss, 41% experienced abdominal pain, 27% of the patients experienced [[Night|nocturnal]] diarrhea, while 14% experienced fatigue and 8% experienced [[Tympany|meteorism]]. The median patient had 6 stools per day. Among the patients who experienced weight loss and whose magnitude of weight loss was recorded, the median lost weight was 6 kg.<ref name="Bohr Tysk Eriksson Abrahamsson 1996 pp. 846–851">{{cite journal | last1=Bohr | first1=J | last2=Tysk | first2=C | last3=Eriksson | first3=S | last4=Abrahamsson | first4=H | last5=Jarnerot | first5=G | title=Collagenous colitis: a retrospective study of clinical presentation and treatment in 163 patients. | journal=Gut | publisher=BMJ | volume=39 | issue=6 | date=1996-12-01 | issn=0017-5749 | doi=10.1136/gut.39.6.846 | pages=846–851| pmid=9038667 | pmc=1383457 | doi-access=free }}</ref> |
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Microscopic colitis causes watery intermittent diarrhea with greater than 10 bowel movements per day. Some patients report nocturnal diarrhea, abdominal pain, vomiting, chills, severe nausea, dehydration and weight loss. Rare complications may include mucosal atrophy after long standing collagenous colitis. Patients report a significantly diminished quality of life. |
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==Causes== |
==Causes== |
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The cause of collagenous colitis is unknown. A connection with autoimmune disorders such as [[celiac disease]] is suspected, as up to 40% of patients with collagenous colitis have an autoimmune disease. Use of [[nonsteroidal anti-inflammatory drugs]] (NSAIDs), [[proton pump inhibitors]] (PPIs) and [[beta blockers]] also appear to increase the risk of collagenous colitis, but the cause of this is not known.<ref name=":0" /> |
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The cause of collagenous colitis is unknown. |
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==Diagnosis== |
==Diagnosis== |
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On [[colonoscopy]], the [[Mucous membrane|mucosa]] of the [[Colon (anatomy)|colon]] typically looks normal, but [[biopsy|biopsies]] of affected tissue usually show deposition of [[collagen]] in the [[lamina propria]], which is the area of [[connective tissue]] between [[Intestinal gland|colonic glands]]. Radiological tests, such as a [[barium enema]] are also typically normal. |
On [[colonoscopy]], the [[Mucous membrane|mucosa]] of the [[Colon (anatomy)|colon]] typically looks normal, but [[biopsy|biopsies]] of affected tissue usually show deposition of [[collagen]] in the [[lamina propria]], which is the area of [[connective tissue]] between [[Intestinal gland|colonic glands]]. Radiological tests, such as a [[barium enema]] are also typically normal.<ref name=":1" /> |
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==Treatment== |
==Treatment== |
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First line treatment for collagenous colitis is the use of [[budesonide]], a steroid that works locally in the colon and is highly cleared by [[first pass effect]]. Other medications that can be used include the following:<ref name=":0" /><ref name=":1" /> |
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Treatment of collagenous colitis is often challenging, and many agents have been used therapeutically: |
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*[[Bismuth]] agents, including [[Pepto-Bismol]] |
* [[Bismuth]] agents, including [[Pepto-Bismol]] |
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*[[5-aminosalicylic acid]] |
* [[5-aminosalicylic acid]] |
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*[[Budesonide]] |
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* [[Infliximab]] |
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*[[Corticosteroids]] |
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Pilot |
Pilot-scale studies have shown some evidence of possible benefit for both ''[[Boswellia serrata]]'' extract and specific strains of [[probiotics]] in the treatment of collagenous colitis, although larger sample sizes are needed to confirm the results.<ref>{{cite journal |vauthors=Madisch A, Miehlke S, Eichele O, Mrwa J, Bethke B, Kuhlisch E, Bästlein E, Wilhelms G, Morgner A, Wigginghaus B, Stolte M |title=''Boswellia serrata'' extract for the treatment of collagenous colitis. A double-blind, randomized, placebo-controlled, multicenter trial |journal=International Journal of Colorectal Disease |volume=22 |issue=12 |pages=1445–51 |date=Dec 2007 |pmid=17764013 |doi=10.1007/s00384-007-0364-1 |s2cid=206966118 }}</ref><ref>{{cite journal |vauthors=Wildt S, Munck LK, Vinter-Jensen L, Hanse BF, Nordgaard-Lassen I, Christensen S, Avnstroem S, Rasmussen SN, Rumessen JJ |title=Probiotic treatment of collagenous colitis: a randomized, double-blind, placebo-controlled trial with ''Lactobacillus acidophilus'' and ''Bifidobacterium animalis'' subsp. ''lactis'' |journal=Inflammatory Bowel Diseases |volume=12 |issue=5 |pages=395–401 |date=May 2006 |pmid=16670529 |doi=10.1097/01.MIB.0000218763.99334.49 |s2cid=870587 |doi-access=free }}</ref><ref>{{cite journal |vauthors=Tromm A, Niewerth U, Khoury M, Baestlein E, Wilhelms G, Schulze J, Stolte M |title=The probiotic ''E. coli'' strain Nissle 1917 for the treatment of collagenous colitis: first results of an open-label trial |journal=Zeitschrift für Gastroenterologie |volume=42 |issue=5 |pages=365–9 |date=May 2004 |pmid=15136935 |doi=10.1055/s-2004-812709 |s2cid=3010852 }}</ref> |
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==Epidemiology== |
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One epidemiological study reported previous [[incidence rate]]s of collagenous colitis found in the literature as ranging from 0.6 cases per 100,000 person-years (based on [[France|French]] data from 1987–1992) to 5.2 per 100,000 person-years (from an [[Iceland|Icelandic]] study based on data from 1995–1999), while the authors themselves found an incidence rate of 3.1 per 100,000 person-years in [[Olmsted County, Minnesota]] across the period 1985–2001. Based only on the subset of the data from 1998–2001, however, the authors found a higher rate of 7.1 per 100,000 person-years, an incidence rate which exceeded those of Crohn's disease and ulcerative colitis.<ref name="PardiLoftus2007">{{cite journal | last1=Pardi | first1=D. S | last2=Loftus | first2=E. V | last3=Smyrk | first3=T. C | last4=Kammer | first4=P. P | last5=Tremaine | first5=W. J | last6=Schleck | first6=C. D | last7=Harmsen | first7=W S. | last8=Zinsmeister | first8=A. R | last9=Melton | first9=L J. | last10=Sandborn | first10=W. J | title=The epidemiology of microscopic colitis: a population based study in Olmsted County, Minnesota | journal=Gut | publisher=BMJ | volume=56 | issue=4 | date=2007-04-01 | issn=0017-5749 | doi=10.1136/gut.2006.105890 | pages=504–508| pmid=17135309 | pmc=1856874 }}</ref> The previously mentioned Icelandic study also found increasing rates through the studied period, with the incidence rate in Iceland increasing from 2.2 in 1995 to 8.3 in 1999.<ref name="Agnarsdottir2002">{{cite journal | last1=Agnarsdottir | first1=Margret | last2=Gunnlaugsson | first2=Olafur | last3=Orvar | first3=Kjartan B. | last4=Cariglia | first4=Nick | last5=Birgisson | first5=Sigurbjorn | last6=Bjornsson | first6=Sigurdur | last7=Thorgeirsson | first7=Thorgeir | last8=Jonasson | first8=Jon Gunnlaugur | title= Collagenous and lymphocytic colitis in Iceland| journal=Digestive Diseases and Sciences | publisher=Springer Science and Business Media LLC | volume=47 | issue=5 | year=2002 | issn=0163-2116 | doi=10.1023/a:1015058611858 | pages=1122–1128| pmid=12018911 | s2cid=24307756 }}</ref> Women appear to be more frequently affected by collagenous colitis than men, with the Icelandic study finding a female–male ratio of 7.9 in diagnosed cases and the Olmsted County study finding a female–male ratio of 4.4.<ref name="PardiLoftus2007" /><ref name="Agnarsdottir2002" /> |
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*[[Colitis]] |
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*[[Lymphocytic colitis]] |
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An updated study on microscopic colitis in Olmsted County published in 2022 and based on data from between 2011 and 2019 found an incidence rate for collagenous colitis of 9.9 cases per 100,000 person-years, a [[Incidence (epidemiology)#Incidence vs. prevalence|prevalence]] of 100.1 per 100,000 persons and a female–male ratio of 4.7. Unlike in the previous study on data from 1995–1999, the rate of collagenous colitis in Olmsted County was found to have remained stable between 2011 and 2019.<ref name="TomeSehga2022" /> Another study on rates of microscopic colitis in [[Denmark]] between 2001 and 2016 found an overall incidence rate for collagenous colitis of 12.2 per 100,000 person-years, a prevalence of 116.7 per 100,000 persons and a female–male ratio of 3.1. Like the 1995–1999 Olmsted County study and the 1995–1999 Icelandic study, this Danish study found a heavy increase in rates of collagenous colitis and microscopic colitis overall during the studied period, with the incidence rates in 2001 and 2016 for microscopic colitis found to be, respectively, 2.3 and 24.3 cases per 100,000 person-years. However, the incidence rates of collagenous colitis in this Danish data peaked in 2011 with a rate of 19.6 cases per 100,000 person-years, and rates appeared to be stable between 2012 and 2016. The average age at diagnosis was found to be 67, and the highest incidence rate was found among patients over the age of 80. The strong increase in the case rates of microscopic colitis (with collagenous colitis making up 59% of these cases) throughout the study period meant that by 2016, microscopic colitis had a greater incidence rate in Denmark than did Crohn's disease and ulcerative colitis. The authors suggest an increase in the use of [[colonoscopy|colonoscopies]] as a possible cause of the observed change in microscopic colitis diagnoses over time.<ref name="WeimersAnkersen2020" /> |
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==References== |
==References== |
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{{Reflist}} |
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{{Research help|Med}} |
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{{Reflist}}personal experience with disease |
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== External links == |
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*{{cite journal |vauthors=Chande N, Driman DK, Reynolds RP |title=Collagenous colitis and lymphocytic colitis: patient characteristics and clinical presentation |journal=Scand. J. Gastroenterol. |volume=40 |issue=3 |pages=343–7 |date=March 2005 |pmid=15932175 | doi=10.1080/00365520510011623 }} |
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{{Medical resources |
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*{{cite journal |author=Yen E. F. |author2=Pardi D. S. |title=Microscopic Colitis – Lymphocytic, Collagenous and ‘Mast Cell’ Colitis |journal=Alimentary Pharmacology & Therapeutics |volume=34 |issue=1 |pages=21–32 |date=May 2011 |doi=10.1111/j.1365-2036.2011.04686.x }} |
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| DiseasesDB = 2955 |
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*{{ cite journal |author=Majores Michael |author2=Wunsch Steffen |author3=Blume Bernd |author4=Fischer Hans-Peter |author5=Reichel Christoph |last-author-amp=yes |title=Mucosal Atrophy in Collagenous Colitis: A Case Report |volume=11 |issue=114 |date=October 2011 |doi=10.1186/1471-230X-11-114 }} |
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| ICD10 = |
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*{{ cite journal |author=Milman Nataliya |author2=Kraa Gunnar |title=NSAID-induced Collagenous Colitis |journal=The Journal of Rheumatology |volume=37 |issue=11 |pages=2432-243 |year=2010 |doi=10.3899/jrheum.100573 }} |
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| ICD9 = |
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| OMIM = |
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| MeshID = D046729 |
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| ICD10CM = {{ICD10CM|K52.831}} |
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{{Digestive system diseases}} |
{{Digestive system diseases}} |
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{{Authority control}} |
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[[Category:Colitis]] |
[[Category:Colitis]] |
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[[Category:Steroid-responsive inflammatory conditions]] |
Latest revision as of 01:33, 2 December 2024
Collagenous colitis | |
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Micrograph of collagenous colitis. H&E stain. | |
Specialty | Gastroenterology |
Collagenous colitis is an inflammatory condition of the colon. Together with the related condition lymphocytic colitis, it is a subtype of microscopic colitis, which is characterized by inflammation that specifically affects the colon (i.e. colitis), and a clinical presentation that involves watery diarrhea but a lack of rectal bleeding. Microscopic colitis does not usually cause macroscopic changes to the colon that allow a visual diagnosis during colonoscopy, instead causing microscopic changes that can be detected through histopathological examination of colonic biopsies. The nature of these microscopic changes is what differentiates collagenous from lymphocytic colitis, with the characteristic finding in collagenous colitis being depositions of collagen in the connective tissue between the colonic glands.[1] Collagenous colitis, and microscopic colitis as a whole, is sometimes considered to be an inflammatory bowel disease (IBD) along with Crohn's disease and ulcerative colitis. However, little is known about the etiology of microscopic colitis, and so the degree of similarity to the inflammatory bowel diseases is uncertain.[1][2]
Although cases are known to occur in all age groups, the disease is most frequently diagnosed in late middle aged or elderly people, with the average person being diagnosed in their 60s. Women are more frequently affected than men, with different studies finding female-male incidence ratios of between 3 and 8. Epidemiological studies have found large increases in diagnosed cases of microscopic colitis, of which collagenous colitis cases are a majority, over the past few decades, with cases of microscopic colitis now outnumbering those of Crohn's disease and ulcerative colitis at least in some regions.[3][4]
Signs and symptoms
[edit]In general, microscopic colitis causes chronic watery diarrhea with increased stool frequency. Some patients report nocturnal diarrhea, abdominal pain, bowel urgency, fecal incontinence, fatigue and weight loss. In severe cases, symptoms may include dehydration and electrolyte imbalances.[5] Patients report a significantly diminished quality of life.[1][6] In a retrospective study specifically on collagenous colitis patients, all studied patients experienced chronic diarrhea, 42% experienced weight loss, 41% experienced abdominal pain, 27% of the patients experienced nocturnal diarrhea, while 14% experienced fatigue and 8% experienced meteorism. The median patient had 6 stools per day. Among the patients who experienced weight loss and whose magnitude of weight loss was recorded, the median lost weight was 6 kg.[7]
Causes
[edit]The cause of collagenous colitis is unknown. A connection with autoimmune disorders such as celiac disease is suspected, as up to 40% of patients with collagenous colitis have an autoimmune disease. Use of nonsteroidal anti-inflammatory drugs (NSAIDs), proton pump inhibitors (PPIs) and beta blockers also appear to increase the risk of collagenous colitis, but the cause of this is not known.[1]
Diagnosis
[edit]On colonoscopy, the mucosa of the colon typically looks normal, but biopsies of affected tissue usually show deposition of collagen in the lamina propria, which is the area of connective tissue between colonic glands. Radiological tests, such as a barium enema are also typically normal.[6]
Treatment
[edit]First line treatment for collagenous colitis is the use of budesonide, a steroid that works locally in the colon and is highly cleared by first pass effect. Other medications that can be used include the following:[1][6]
- Bismuth agents, including Pepto-Bismol
- 5-aminosalicylic acid
- Immunosuppressants, including azathioprine
- Infliximab
Pilot-scale studies have shown some evidence of possible benefit for both Boswellia serrata extract and specific strains of probiotics in the treatment of collagenous colitis, although larger sample sizes are needed to confirm the results.[8][9][10]
Epidemiology
[edit]One epidemiological study reported previous incidence rates of collagenous colitis found in the literature as ranging from 0.6 cases per 100,000 person-years (based on French data from 1987–1992) to 5.2 per 100,000 person-years (from an Icelandic study based on data from 1995–1999), while the authors themselves found an incidence rate of 3.1 per 100,000 person-years in Olmsted County, Minnesota across the period 1985–2001. Based only on the subset of the data from 1998–2001, however, the authors found a higher rate of 7.1 per 100,000 person-years, an incidence rate which exceeded those of Crohn's disease and ulcerative colitis.[11] The previously mentioned Icelandic study also found increasing rates through the studied period, with the incidence rate in Iceland increasing from 2.2 in 1995 to 8.3 in 1999.[12] Women appear to be more frequently affected by collagenous colitis than men, with the Icelandic study finding a female–male ratio of 7.9 in diagnosed cases and the Olmsted County study finding a female–male ratio of 4.4.[11][12]
An updated study on microscopic colitis in Olmsted County published in 2022 and based on data from between 2011 and 2019 found an incidence rate for collagenous colitis of 9.9 cases per 100,000 person-years, a prevalence of 100.1 per 100,000 persons and a female–male ratio of 4.7. Unlike in the previous study on data from 1995–1999, the rate of collagenous colitis in Olmsted County was found to have remained stable between 2011 and 2019.[3] Another study on rates of microscopic colitis in Denmark between 2001 and 2016 found an overall incidence rate for collagenous colitis of 12.2 per 100,000 person-years, a prevalence of 116.7 per 100,000 persons and a female–male ratio of 3.1. Like the 1995–1999 Olmsted County study and the 1995–1999 Icelandic study, this Danish study found a heavy increase in rates of collagenous colitis and microscopic colitis overall during the studied period, with the incidence rates in 2001 and 2016 for microscopic colitis found to be, respectively, 2.3 and 24.3 cases per 100,000 person-years. However, the incidence rates of collagenous colitis in this Danish data peaked in 2011 with a rate of 19.6 cases per 100,000 person-years, and rates appeared to be stable between 2012 and 2016. The average age at diagnosis was found to be 67, and the highest incidence rate was found among patients over the age of 80. The strong increase in the case rates of microscopic colitis (with collagenous colitis making up 59% of these cases) throughout the study period meant that by 2016, microscopic colitis had a greater incidence rate in Denmark than did Crohn's disease and ulcerative colitis. The authors suggest an increase in the use of colonoscopies as a possible cause of the observed change in microscopic colitis diagnoses over time.[4]
References
[edit]- ^ a b c d e Park, Tina; Cave, David; Marshall, Christopher (2015-08-07). "Microscopic colitis: A review of etiology, treatment and refractory disease". World Journal of Gastroenterology. 21 (29): 8804–8810. doi:10.3748/wjg.v21.i29.8804. ISSN 1007-9327. PMC 4528022. PMID 26269669.
- ^ Jegadeesan R, Liu X, Pagadala MR, Gutierrez N, Butt M, Navaneethan U (2013). "Microscopic colitis: is it a spectrum of inflammatory bowel disease?". World J Gastroenterol. 19 (26): 4252–6. doi:10.3748/wjg.v19.i26.4252. PMC 3710430. PMID 23864791.
{{cite journal}}
: CS1 maint: multiple names: authors list (link) - ^ a b Tome, June; Sehgal, Kanika; Kamboj, Amrit K.; Harmsen, William S.; Kammer, Patricia P.; Loftus, Edward V.; Tremaine, William J.; Khanna, Sahil; Pardi, Darrell S. (2022). "The Epidemiology of Microscopic Colitis in Olmsted County, Minnesota: Population-Based Study From 2011 to 2019". Clinical Gastroenterology and Hepatology. 20 (5). Elsevier BV: 1085–1094. doi:10.1016/j.cgh.2021.06.027. ISSN 1542-3565. PMC 8716639. PMID 34216819.
- ^ a b Weimers, Petra; Ankersen, Dorit Vedel; Lophaven, Søren; Bonderup, Ole Kristian; Münch, Andreas; Løkkegaard, Ellen Christine Leth; Burisch, Johan; Munkholm, Pia (2020-06-05). "Incidence and Prevalence of Microscopic Colitis Between 2001 and 2016: A Danish Nationwide Cohort Study". Journal of Crohn's and Colitis. 14 (12). Oxford University Press (OUP): 1717–1723. doi:10.1093/ecco-jcc/jjaa108. ISSN 1873-9946. PMID 32502240.
- ^ Tome, June; Kamboj, Amrit K.; Pardi, Darrell S. (2021). "Microscopic Colitis: A Concise Review for Clinicians". Mayo Clinic Proceedings. 96 (5). Elsevier BV: 1302–1308. doi:10.1016/j.mayocp.2021.03.022. ISSN 0025-6196. PMID 33958059.
- ^ a b c O’Toole, Aoibhlinn (2016-02-10). "Optimal management of collagenous colitis: a review". Clinical and Experimental Gastroenterology. 9: 31–39. doi:10.2147/CEG.S67233. ISSN 1178-7023. PMC 4754103. PMID 26929656.
- ^ Bohr, J; Tysk, C; Eriksson, S; Abrahamsson, H; Jarnerot, G (1996-12-01). "Collagenous colitis: a retrospective study of clinical presentation and treatment in 163 patients". Gut. 39 (6). BMJ: 846–851. doi:10.1136/gut.39.6.846. ISSN 0017-5749. PMC 1383457. PMID 9038667.
- ^ Madisch A, Miehlke S, Eichele O, Mrwa J, Bethke B, Kuhlisch E, Bästlein E, Wilhelms G, Morgner A, Wigginghaus B, Stolte M (Dec 2007). "Boswellia serrata extract for the treatment of collagenous colitis. A double-blind, randomized, placebo-controlled, multicenter trial". International Journal of Colorectal Disease. 22 (12): 1445–51. doi:10.1007/s00384-007-0364-1. PMID 17764013. S2CID 206966118.
- ^ Wildt S, Munck LK, Vinter-Jensen L, Hanse BF, Nordgaard-Lassen I, Christensen S, Avnstroem S, Rasmussen SN, Rumessen JJ (May 2006). "Probiotic treatment of collagenous colitis: a randomized, double-blind, placebo-controlled trial with Lactobacillus acidophilus and Bifidobacterium animalis subsp. lactis". Inflammatory Bowel Diseases. 12 (5): 395–401. doi:10.1097/01.MIB.0000218763.99334.49. PMID 16670529. S2CID 870587.
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