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GlossaryPeripilar Casts

small, white sheaths encircling hair shafts near the scalp

Peripilar casts are small, white, cylindrical sheaths that encircle the hair shaft near the scalp. They are often seen in conditions like alopecia areata or telogen effluvium and can be indicative of inflammation or other underlying scalp disorders. These casts can be mistaken for dandruff but are firmly attached to the hair and do not easily flake off.

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research A Dermoscopic Clue for the Diagnosis of Traction Alopecia: Peripilar Keratin Casts Case Report

January 2015 in “Turkiye Klinikleri Journal of Dermatology”

Peripilar keratin casts are a helpful sign for diagnosing traction alopecia.

research Hair Casts: Classification, Staining Characteristics, And Differential Diagnosis

27 citations , January 1983 in “Journal of the American Academy of Dermatology”

A new method helps identify and classify different types of hair casts.

research Generalized Hair Casts Due to Traction

4 citations , August 2013 in “Pediatric dermatology”

Hair casts can be treated with physical removal and special shampoos.

research Peripilar Sheaths

2 citations , June 2010 in “Medicina de Familia SEMERGEN”

The girl's "dandruff" was actually harmless hair casts, not a hygiene issue.

research Adult Onset Hair Casts: Nits Which Do Not Itch

2 citations , January 2017 in “PubMed”

Hair casts are harmless but can be mistaken for head lice.

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community The MPB itch aka DHT itch is very real.

in Chat 9 upvotes 3 years ago

Hair loss itch is caused by DHT attacking follicles and stimulating nerves. Finasteride users who respond well don't experience this itch.

community What do these pictures say about my hair and scalp if anything? Miniaturization, inflammation, etc.?

in Research/Science 74 upvotes 3 years ago

Hair loss and scalp issues, with people discussing possible treatments such as Nizoral shampoo, Minoxidil, neem oil, and finasteride.

community Reducing Fibrosis in Hair Loss: Topical Pirfenidone

in Research/Science 52 upvotes 1 day ago

Topical pirfenidone is highlighted as an effective anti-inflammatory and anti-fibrotic treatment for hair loss, particularly in addressing perifollicular fibrosis, which may enhance the effectiveness of standard treatments like finasteride and minoxidil. The user also uses calcipotriol, MCT oil, ciclopirox shampoo, and benzoyl peroxide shampoo as part of their regimen.