Hair casts: Difference between revisions
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== Causes == |
== Causes == |
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Although the exact cause is frequently unknown, [[pityriasis amiantacea]], [[Seborrhoeic dermatitis|seborrheic dermatitis]], hair nodes, scalp [[psoriasis]], traction-based hairstyles, and hair spray use have all been linked to their occurrence.<ref name="França 2011">{{cite journal | |
Although the exact cause is frequently unknown, [[pityriasis amiantacea]], [[Seborrhoeic dermatitis|seborrheic dermatitis]], hair nodes, scalp [[psoriasis]], traction-based hairstyles, and hair spray use have all been linked to their occurrence.<ref name="França 2011">{{cite journal | last1=França | first1=Katlein | last2=Silva | first2=IsabellaRezende | last3=Bedin | first3=Valcinir | last4=Villa | first4=RicardoTadeu | last5=de Carvalho | first5=CristineAlmeida | title=Hair casts or pseudonits | journal=International Journal of Trichology | publisher=Medknow | volume=3 | issue=2 | year=2011 | pages=121–122 | issn=0974-7753 | doi=10.4103/0974-7753.90834 | doi-access=free | pmid=22223977 | pmc=3250010 }}</ref> |
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== Diagnosis == |
== Diagnosis == |
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According to research using [[Electron microscope|electron microscopy]], the real peripillous hair casts are typically constituted of the exterior root sheath, with the internal root sheath occurring infrequently. Some are even composed of both the internal and external sheaths.<ref name="Taïeb 1985 p. 1009">{{cite journal | last=Taïeb | first=Alain | title=Hair Casts: A Clinical and Morphologic Study | journal=Archives of Dermatology | volume=121 | issue=8 | date=1985-08-01 | issn=0003-987X | doi=10.1001/archderm.1985.01660080063015 | |
According to research using [[Electron microscope|electron microscopy]], the real peripillous hair casts are typically constituted of the exterior root sheath, with the internal root sheath occurring infrequently. Some are even composed of both the internal and external sheaths.<ref name="Taïeb 1985 p. 1009">{{cite journal | last=Taïeb | first=Alain | title=Hair Casts: A Clinical and Morphologic Study | journal=Archives of Dermatology | volume=121 | issue=8 | date=1985-08-01 | pages=1009–1013 | issn=0003-987X | doi=10.1001/archderm.1985.01660080063015 | pmid=4026336 }}</ref> |
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== Treatment == |
== Treatment == |
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== Further reading == |
== Further reading == |
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* {{cite journal | |
* {{cite journal | last1=Lokhande | first1=Archana Jagdish | last2=Sutaria | first2=Amita | title=Adult Onset Hair Casts: Nits Which Do Not Itch! | journal=International Journal of Trichology | date=2017 | publisher=Wolters Kluwer -- Medknow Publications | volume=9 | issue=2 | pages=70–72 | pmid=28839391 | doi=10.4103/ijt.ijt_30_17 | doi-access=free | ref=none| pmc=5551310 }} |
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* {{cite journal | |
* {{cite journal | last1=Scott | first1=Michael J. | last2=Roenigk | first2=Henry H. | title=Hair casts: Classification, staining characteristics, and differential diagnosis | journal=Journal of the American Academy of Dermatology | publisher=Elsevier BV | volume=8 | issue=1 | year=1983 | issn=0190-9622 | doi=10.1016/s0190-9622(83)70003-4 | pages=27–32 | pmid=6186702 | ref=none}} |
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== External links == |
== External links == |
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Latest revision as of 01:26, 21 June 2024
| Hair casts | |
|---|---|
| Specialty | Dermatology |
Hair casts, also known as pseudonits, represent remnants of the inner root sheath, and often occur in great numbers and may mimic nits in the scalp.[1]: 764
Signs and symptoms
[edit]Hair casts are distinct, solid, shining, white, freely mobile, tubular accretions that measure 2 to 7 mm in length and wrap the scalp's hair shafts.[2]
Causes
[edit]Although the exact cause is frequently unknown, pityriasis amiantacea, seborrheic dermatitis, hair nodes, scalp psoriasis, traction-based hairstyles, and hair spray use have all been linked to their occurrence.[3]
Diagnosis
[edit]According to research using electron microscopy, the real peripillous hair casts are typically constituted of the exterior root sheath, with the internal root sheath occurring infrequently. Some are even composed of both the internal and external sheaths.[4]
Treatment
[edit]Coaltar or keratolitic shampoo treatment is not effective. The best results are obtained when the cylinders are manually removed using a comb and a 0.025% retinoic acid solution.[3]
See also
[edit]References
[edit]- ^ James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. ISBN 0-7216-2921-0.
- ^ "Hair casts". Journal of the American Academy of Dermatology. 66 (4): AB99. 2012. doi:10.1016/j.jaad.2011.11.420.
- ^ a b França, Katlein; Silva, IsabellaRezende; Bedin, Valcinir; Villa, RicardoTadeu; de Carvalho, CristineAlmeida (2011). "Hair casts or pseudonits". International Journal of Trichology. 3 (2). Medknow: 121–122. doi:10.4103/0974-7753.90834. ISSN 0974-7753. PMC 3250010. PMID 22223977.
- ^ Taïeb, Alain (1985-08-01). "Hair Casts: A Clinical and Morphologic Study". Archives of Dermatology. 121 (8): 1009–1013. doi:10.1001/archderm.1985.01660080063015. ISSN 0003-987X. PMID 4026336.
Further reading
[edit]- Lokhande, Archana Jagdish; Sutaria, Amita (2017). "Adult Onset Hair Casts: Nits Which Do Not Itch!". International Journal of Trichology. 9 (2). Wolters Kluwer -- Medknow Publications: 70–72. doi:10.4103/ijt.ijt_30_17. PMC 5551310. PMID 28839391.
- Scott, Michael J.; Roenigk, Henry H. (1983). "Hair casts: Classification, staining characteristics, and differential diagnosis". Journal of the American Academy of Dermatology. 8 (1). Elsevier BV: 27–32. doi:10.1016/s0190-9622(83)70003-4. ISSN 0190-9622. PMID 6186702.