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 Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor Diagnosis of oral pigmentations and malignant transformations ScienceDirect Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics Oral pigmented lesions: a pragmatic approach to diagnosis and management Faculty Dental Journal Oral pathology: Noting a pigmented macule that often presents a diagnostic dilemma Registered Dental Hygienists