Oral melanotic macule and primary oral malignant melanoma: Epidemiology, location involved, and clinical implications Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics Happy Wednesday! , In this video, a patients labial melanotic macule (a benign pigmented lesion) is being treated with liquid nitrogen. Labial melanotic macules are flat and asymmetrical with a Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome AD :: Annals of Dermatology