label: Giant Congenital Melanocytic Nevus
label_lc: giant congenital melanocytic nevus
description: "A congenital melanocytic nevus that measures more than 200 mm or is unresectable. It usually presents as a dark brown to black hairy lesion. Morphologically, it is characterized by the presence of a compound or intradermal nevus. There is an increased risk of malignant transformation to melanoma, rhabdomyosarcoma, and poorly differentiated malignant tumors."