Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com 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 Malignant melanomacutaneous and mucosal. a, b Melanoma of the right Download Scientific Diagram COM Jan. 2008 Diagnosis UW School of Dentistry Labial melanotic macule