Melanoma vs. Sarcoma: Identifying the Difference 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 The labial melanotic macule: a review of 79 cases Diagnosis change: AFX to Pleomorphic Sarcoma of Neck Skin Cancer and Reconstructive Surgery Center Melanotic sarcoma growing from the mucous membrane of the lip and upper alveolar border of the jaw Stock Photo Alamy