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2007, Volume 23, Number 3, Page(s) 169-172     
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Pseudomelanoma developing after shave excision of melanocytic nevus: Case report and review of literature
1Başkent Üniversitesi Tıp Fakültesi Patoloji, Anabilim Dalı, ANKARA
2Başkent Üniversitesi Tıp Fakültesi Dermatoloji, Anabilim Dalı, ANKARA
Keywords: Melanoma, excision, recurrence

Pseudomelanoma is a pigmented lesion of the skin which follows incomplete excision of a benign nevus and imitates a superficial spreading malignant melanoma both histopathologically and dermatoscopically. Recognition of the features of pseudomelanoma can help preventing unnecessary treatment. Here we report a case of pseudomelanoma occuring two months after a shave excision on the abdomen of a 22 year-old-woman. The original material had not been examined histopathologically. The recurrent lesion had a high score for malignancy under dermatoscopical examination. Some of the histopathological findings resembled in part to malignant melanoma. The patient's history of previous incomplete excision, the presence of remnants of mature melanocytic nevus cell nests and the lack of epidermal invasion were among the helpful findings which helped us diagnose the lesion as pseudomelanoma. In this article, the differential diagnosis of pseudomelanoma from malignant melanoma has been discussed and the importance of recognition of entity is stressed.

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