A 45-year-old woman presented with a rapidly changing nevus on her leg ... no personal or family histories of malignant melanoma. Skin examination showed an 8 mm × 10 mm irregularly shaped ...

to discover that he had Giant Hairy Congenital Melanocytic Nevus (CMN). CMN are visible pigmented (melanocytic) proliferations in the skin that are present at birth. Small to medium CMN typically ...