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Sunday 25 November 2007

Traumatized nevus

A 52-year-old woman used to be heavily sun-exposed during her holidays. Her husband noticed that a mole on her back was changing. Dermoscopically the lesion shows asymmetric colors and structures, a reticular and homogenous pattern and central area of hypopigmentation. Main hypotheses were an atypical (dysplastic) nevus with central hypopigmentation or a superficial spreading melanoma. The lesion was excised. Pathology revealed a traumatized benign junctionnal naevus. The patient did not remind any traumatism on this lesion. Melanocytic nevi can have atypical clinical and dermoscopic presentations in case of traumatism. This traumatism is sometimes not mentionned when taking the history