Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor Pigmented Lesions Springer Nature Link Mucosal melanocytic macules 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 Lingual melanotic macule the first case report in an adult patient* Anais Brasileiros de Dermatologia