Pityriasis alba (Q43885): Difference between revisions

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Latest revision as of 11:05, 13 August 2026

A common low grade inflammatory dermatosis of unknown aetiology in which multiple small finely scaling macules appear on the face, and less commonly the shoulders and upper arms, of children. These may initially be mildly erythematous but soon become hypopigmented with fine surface scale. Histopathologically there is a mild subacute spongiotic dermatitis with reduction in melanin. It is more prominent in children with pigmented skin and may give rise to concern about vitiligo.

Language	Label	Description	Also known as
default for all languages	EA88.4
English	Pityriasis alba	A common low grade inflammatory dermatosis of unknown aetiology in which multiple small finely scaling macules appear on the face, and less commonly the shoulders and upper arms, of children. These may initially be mildly erythematous but soon become hypopigmented with fine surface scale. Histopathologically there is a mild subacute spongiotic dermatitis with reduction in melanin. It is more prominent in children with pigmented skin and may give rise to concern about vitiligo.