Melanosis and Lentiginosis (benign) Vulvovaginal Disorders Pigmented Lesions and Melanoma Plastic Surgery KeyPlastic Surgery Key Oral Melanotic Macule: Symptoms and Treatment Skinsight Melanotic macules of the tongue in a newborn Journal of the American Academy of Dermatology 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