Mucosal melanocytic macules Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis This is a picosecond laser treatment of labial melanotic macules on the gingiva. Note the green flashes of the 532 nm laser as well as the immediate tissue whitening of the treated area. This Oral Melanosis Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360