Pigmented Lesions of the Oral Mucosa Pocket Dentistry 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 Diagnosis of oral pigmentations and malignant transformations ScienceDirect What to do with pigmented oral lesions? Dental Update Malignant oral melanoma: how to spot it and how it is managed Dental Update Oral Mucosal Melanosis IntechOpen