Phylloid hypomelanosis associated with a mosaic trisomy 13 in the 13q31.3-qter region: atypical phylloid distribution and typical hypomelanosis.

Abstract

Mosaicism in human skin results in different cutaneous patterns: the narrow lines of Blaschko (type 1a), the broad lines of Blaschko (type 1b), the checkerboard pattern (type 2), the phylloid pattern (type 3), and a patchy pattern without midline separation (type 4) (Happle, 1993). The phylloid pattern is characterized by an arrangement of pigmentary disturbances reminiscent of floral ornamentsor a Jugendstil painting (Happle, 1993). Phylloid hypomelanosis is characterized by congenital hypopigmented macules following the phylloid pattern. This article is protected by copyright. All rights reserved.