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 Transformation of a benign oral pigmentation to primary oral melanoma Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics Oral melanoacanthoma of the palate: An unusual presentation of an uncommon entity JAAD Case Reports Clinical and histopathological features of oral pigmented lesions. A. Download Scientific Diagram