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April 2006

An Erythematous and Pigmented Lesion of the Abdomen—Diagnosis

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Arch Dermatol. 2006;142(4):515-520. doi:10.1001/archderm.142.4.515-f

The biopsy specimen from the pink area revealed an intraepidermal melanocytic proliferation with pagetoid spread and severe cytologic atypia. Melanocytes with similarly atypical cytologic features were present in the underlying papillary dermis. This superficial spreading melanoma, which was 0.4 mm deep and invasive to Clark level II, was present in the margins of the specimen. At one edge of the biopsy specimen, there was a lentiginous and nested intraepidermal and dermal melanocytic proliferation, indicating an associated dysplastic nevus (Figure 2). There was no evidence of ulceration or vertical growth.

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