A case of keratosis circumscripta in a Chinese boy.

Keratosis circumscripta is a rare dermatosis occurring in children and adolescents that has been reported in the English literature only in Africans and their descendants. We report here a case of keratosis circumscripta in a 13-year-old Chinese boy who presented with pruritic follicular keratotic rashes below both knees. This case indicates that keratosis circumscripta may not occur only in individuals of African descent.