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 Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com Dental Update Malignant oral melanoma: how to spot it and how it is managed Dental Update Smoker's melanosis Wikipedia Black Gums: What Your Oral Health Reveals Smile Studio Boston