Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer Pathology Outlines Melanotic macule Extension Without Malignant Changes in Oral Melanotic Macule: A Report of Two Cases and Review of the Literature 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 Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis