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Revista argentina de dermatología
versión On-line ISSN 1851-300X
Resumen
VALBUENA, MC y PATINO, LA. Lineal psoriasis and segmental vitiligo overlapped. Presentation of two frequent conditions. Rev. argent. dermatol. [online]. 2013, vol.94, n.1. ISSN 1851-300X.
The association of psoriasis and vitiligo is a well documented event, with an incidence of 3% according to different case series, but reports of an overlap of both diseases following Blaschko lines were not found in the reviewed literature. We present the case of a 47 years old woman with vitiligo lesions in the face and abdomen, starting since childhood, distributed over the Blaschko lines; thirty years later erythematous and squamous plaques appeared over the achromic macules of the abdominal region which were clinically and histopathologically compatible with psoriasis and improved partially with narrow band UVB phototherapy. Psoriasis and vitíligo are multifactorial and polygenic skin disorders that can show patterns of cutaneous mosaicism. Some theories have tried to explain this phenomenon, but the factors that influence this presentation are still unclear.
Palabras clave : Vitiligo; Mosaicism; Polygenic skin disorders; Psoriasis.