Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 Pigmented Lesions of the Oral Mucosa Pocket Dentistry 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 LABIAL LENTIGO, Labial Lentigo also called a labial melanotic macule, is a harmless, small, flat, brown spot on the lip. It can develop after repeated sun exposure. In most cases, labial lentigo Dark Spot on Lip: Harmless or Serious? What to Check First La Bouche Parfaite dermoscopy: A pigmented labial lesion