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Risk of sun‐induced skin cancers in patients with alopecia areata, alopecia totalis and alopecia universalis

Alopecia areata (AA) is an autoimmune non-scarring hair loss characterized by round patches on the scalp and body. It can progress to alopecia totalis (AT) where there is total loss of scalp hair and alopecia universalis (AU) in where hair loss encompasses the entire body. The pathophysiologic mechanism is unclear, but is thought to be due to peribulbar T-cell inflammation which results in premature induction of anagen follicles to catagen and telogen, without causing destruction of the hair follicle. This article is protected by copyright. All rights reserved.