Melanotic 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 Mucocutaneous Pigmented Lesions, Nevi and Melanoma (Chapter 4) Pediatric Head and Neck Pathology Figure 4 from Clinicopathologic features of 28 cases of nail matrix nevi (NMNs) in Asians: Comparison between children and adults Semantic Scholar Melanocytic lesions Libre Pathology Frontiers Mucosal Melanoma: Pathological Evolution, Pathway Dependency and Targeted Therapy Vulvar Melanocytic Lesions Springer Nature Link