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 Pigmented Lesions of the Oral Cavity Pocket Dentistry Histopathological Findings of a Melanocytic Nevus A melanocytic nevus is a benign proliferation of melanocytes. Under the microscope, typical features include: Nests or clusters of uniform melanocytes located at the dermoepidermal junction, Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor Melanocytic Proliferations and Other Pigmented Lesions Plastic Surgery KeyPlastic Surgery Key Pathology Outlines Melanotic macule