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 MEDizzy Dentistry and Medicine: Pigmentation and Discoloration of Oral and Facial Tissues Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer Dental Update Malignant oral melanoma: how to spot it and how it is managed Dental Update Dental Update Malignant oral melanoma: how to spot it and how it is managed Dental Update