What to do with pigmented oral lesions? Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review Pigmented Lesions of the Oral Cavity Pocket Dentistry Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer 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