Pigmented Lesions of the Oral Mucosa Pocket Dentistry COM March 2009 Diagnosis UW School of Dentistry 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 Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360