Conjunctival Nevus: Symptoms, Causes and Treatment New Research Helps Identify Uveal Melanomas Most Likely to Spread to the Liver How Can You Tell if It's Melanoma or Just a Mole? Melanoma Pictures: Skin Changes and What to Look For This lovely patient was thrilled with her beautiful result after laser treatment of oral melanotic macules. I share this case to educate: laser treatment requires accurate diagnosis, an understanding of the differential 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