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A case of adult-onset longitudinal melanonychia due to nail matrix compound nevus
Pembegül Güneş1, Fatih Göktay2, Eckart Haneke3
1Department of Pathology, Hamidiye Medical Faculty, Haydarpaşa Numune Training and Research Hospital, University of Health Sciences Turkey, İstanbul, Turkey.
Abstract:
A case of adult-onset longitudinal melanonychia caused by a compound nevus is described. Longitudinal melanonychias are mainly caused by melanocytic activation (hypermelanosis), lentigo (benign melanocytic hyperplasia), nevus, and melanoma. Nevi are more commonly seen in children than adults; however, melanocytic activation, atypical melanocytic proliferation, and melanoma are more frequent in adults. The majority of nail matrix nevi causing longitudinal melanonychia first appear in childhood and are junctional. Rarely, compound nevi are reported to cause longitudinal melanonychia in childhood.
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