Pathology Outlines Melanotic macule Melaninassociated pigmented lesions of the oral mucosa: presentation, differential diagnosis, and treatment Mller 2010 Dermatologic Therapy Wiley Online Library 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 Diffuse pigmentation of the oral mucosa Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics Pigmented Lesions of the Oral Mucosa Pocket Dentistry