In the process of removing a Labial Melanotic Macule. A Labial Melanotic Macule is a well defined, oval, brown to black, flat patch on the central third of the lower lip, as seen Pigmentation Document Gale OneFile: Health and Medicine Oral Mucosal Melanosis IntechOpen An oral melanotic macule is a harmless dark spot found on the lip, most often the lower lip, or inside the mouth, either on the gums, inside the cheek, or on the roof of the mouth. An oral melanotic Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer