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 Figure 2 from Clinicopathologic features of 28 cases of nail matrix nevi (NMNs) in Asians: Comparison between children and adults Semantic Scholar Disorders of Pigmentation of the Nails and Mucous Membranes Springer Nature Link The Art of Nail Findings in Patients with Skin of Color Next Steps in Dermatology Diagnosing And Treating Pigmented Nail Lesions
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