Pigmented Lesions of the Oral Mucosa Pocket Dentistry Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor Lingual melanotic macule the first case report in an adult patient* Anais Brasileiros de Dermatologia Lingual melanotic macule the first case report in an adult patient* Anais Brasileiros de Dermatologia ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production 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