Six features of melanocytic lesions at level 1 of first step. a) Download Scientific Diagram 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 Case Report: melanoma and melanocytic nevus F1000Research Literature Update on Melanocytic Nevi and Pigmented Lesions in the Pediatric Population Current Dermatology Reports Springer Nature Link