Labial melanotic macule (brown spot on lip) (Stony Brook Case 1) dermatology dermatopathology YouTube COM Jan. 2008 Diagnosis UW School of Dentistry Laser Lip Treatment for Lip Discoloration: Patient Transformation Melanotic Macules, Naevi, and Melanoma Springer Nature Link 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 Mucosal melanocytic macules