Pigmented Lesions of the Oral Mucosa Pocket Dentistry Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production Pigmented Lesions of the Oral Cavity Pocket Dentistry Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor COM March 2009 Diagnosis UW School of Dentistry