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 Oral Mucosal Melanosis IntechOpen Diagnosis of oral pigmentations and malignant transformations ScienceDirect COM August 2004 Diagnosis UW School of Dentistry Pigmented (Purple or Brown) Lesions in the Mouth melanotic macule Archives Kazemi Oral Surgery Facialart.com Pigmented Lesions of the Oral Mucosa Pocket Dentistry