Collision tumor: pigmented Bowen's disease and seborrheic keratosis.

Anais Brasileiros De Dermatologia
Karen de Almeida Pinto FernandesGabriella Campos-do-Carmo

Abstract

Bowen's disease is a type of squamous cell carcinoma in situ of the skin. The pigmented form is rare and represents less than 2% of cases. We report a case of a 74-year-old black man with a blackened and asymptomatic leg injury for about 6 months. Clinically, and under dermatoscopy, the injury was suggestive of melanoma or melanoacanthoma, and a definitive diagnosis was made by histopathological examination.

References

Jan 19, 2010·Journal of the American Academy of Dermatology·Alan CameronHarald Kittler
May 17, 2011·Indian Journal of Dermatology·Vikas ShankarSanjay Ghosh
Sep 4, 2014·Anais Brasileiros De Dermatologia·Amanda Nascimento Cavalleiro de Macedo MotaMónica Jidid Mateus Tarazona
Aug 28, 2015·Anais Brasileiros De Dermatologia·Paula Mota MedeirosJuan Piñeiro-Maceira
May 22, 2016·The Journal of Dermatology·Takeshi NamikiMasaru Tanaka

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