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 Pathology Outlines - Melanotic macule
Pathology Outlines Melanotic macule Melanonychia Jefferson 2012 Dermatology Research and Practice Wiley Online Library Congenital Melanotic Macule of the Tongue: Report of Two Cases and Literature Review Head and Neck Pathology Springer Nature Link melanotic macule of matrix Subungual Melanocytic Lesions: Key Clinical and Pathologic Concepts and Biopsy Techniques Nail matrix nevi Courtesy of The Art of Nail Findings in Patients with Skin of Color Next Steps in Dermatology Disorders of Pigmentation of the Nails and Mucous Membranes Springer Nature Link
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