Pathology Outlines Oral mucosal melanoma Mucosal Melanotic Macule Springer Nature Link Melanotic macules of the tongue in a newborn Journal of the American Academy of Dermatology Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram 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