What to do with pigmented oral lesions? Mole on the inside of the cheek : r 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 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 Mucosa Springer Nature Link The dermatologic oral examination: Navigating the Oral Dermatoses Map Journal of the American Academy of Dermatology