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 Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 Definition of melanocytic macules associated with Peutz Jeghers syndrome NCI Dictionary of Genetics Terms NCI Congenital Melanotic Macule of the Tongue: A Five Year Follow up Dermatology Practical & Conceptual