Macular Pigmented Oral Mucosal Lesions: An Amalgam Tattoo Case Report Dentistry Today 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 Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram Oral melanoacanthoma of the palate: An unusual presentation of an uncommon entity JAAD Case Reports Pathology Outlines Melanotic macule