Oral Mucosal Melanosis IntechOpen Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 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 Melanocytic Proliferations Clinical Tree Melanocytic nevi and malignant melanoma Medizinonline