Pigmented Lesions of the Oral Mucosa Pocket Dentistry Diagnosis of oral pigmentations and malignant transformations ScienceDirect 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 Labial Melanotic Macules DoveMed Taint melanotic of the lip vaporization laser UNILASER MDICA