ICD-11 definition : 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.;
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.