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An Bras Dermatol. 2019 Mar-Apr;94(2):230-232. doi: 10.1590/abd1806-4841.20197280. Epub 2019 May 9.

The transition between a poroma and a porocarcinoma evidenced by the dermoscopy.

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Department of Dermatology, Hospital do Servidor Estadual de São Paulo, São Paulo (SP), Brazil.


Eccrine porocarcinoma (EPC) is a rare malignant skin tumor. The dermoscopy of invasive EPC reveals focal presence of whitish-pink, structureless areas surrounded by pinkish-white halos. In an eccrine poroma (EP), such areas present diffuse distribution in the "frog- eggs" pattern. We reported an EPC in situ that presents a transitional dermoscopy pattern between EP and invasive EPC. We found a diffuse distribution; whitish-pink, structureless areas surrounded by pinkish-white halos; a central exulceration and a polymorphic vascular pattern.

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