Nodular nail unit melanoma mimicking a non‐healing ulcer: Dermoscopic and reflectance confocal microscopic features.

Lesion characteristics had the aspect of a probable melanocytic or non-melanocytic skin tumor, but we couldn't exclude the possible diagnosis of an inflammatory disease, due to the unspecific morphology of vessels and the diffuse ulceration. Dear Editor, Nail unit melanoma (NUM) is a rare melanoma that originates from the nail unit apparatus. Nodular nail unit melanoma mimicking a non-healing ulcer: Dermoscopic and reflectance confocal microscopic features. [Extracted from the article]