A traumatized melanocytic nevus with atypical clinical and dermoscopic features: a case report and review of the literature

We report the case of an adolescent girl that presented with an atypical melanocytic lesion on the left gluteal region, suspicious for melanoma. She was healthy with no associated diseases, and there was no history of skin cancer in the family. The nevus had been present for several years, but she had noted a change and growth of it in the last few months. She reported that the nevus was injured about 2 years earlier and it had appeared different ever since. Although dermoscopic examination showed the lesion to be highly suspicious for melanoma and it was therefore surgically excised on the same day, pathohistological examination showed a compound melanocytic nevus with extensive dermal fibrosis/regression and overlying atypical junctional hyperplasia of melanocytes consistent with pseudomelanoma, also known as recurrent melanocytic nevus.

Automated summary

A teenage girl presented with an atypical melanocytic lesion suspicious for melanoma, which was later diagnosed as pseudomelanoma after surgical excision. The irregular changes in the nevus may have been caused by a previous injury.