melanotic macule of matrix macule. Benign. Dark spot on labia (or lip). Analogous to lentigo simplex. Hyperpigmented basal keratinocytes & dermal melanophages. Slight ⬆️ in single basal melanocytes; NO nests. More info like this in Disorders of Pigmentation of the
Disorders of Pigmentation of the Nails and Mucous Membranes Springer Nature Link Diagnosing And Treating Pigmented Nail Lesions melanotic macule of matrix Subungual Melanocytic Lesions: Key Clinical and Pathologic Concepts and Biopsy Techniques Nail matrix nevi Courtesy of Melanotic macule of nail unit and its clinicopathologic spectrum ScienceDirect
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