Pigmentation Document Gale Academic OneFile COM Dec. 2011 Diagnosis UW School of Dentistry Oral melanotic macule Stock Image C067 2477 Science Photo Library Oral melanotic macule and primary oral malignant melanoma: Epidemiology, location involved, and clinical implications Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics 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 Oral and Maxillofacial Surgery Clinics