Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram Pathology Outlines Nevi general Pathology Outlines Invasive melanoma 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: Case Series of 33 Cases and Review of the Literature Head and Neck Pathology Springer Nature Link