Melanocytic lesions Libre Pathology 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 What Is an Acquired Melanocytic Nevus? Cutaneous and Oral Melanocytic Nevi: Background, Pathophysiology, Etiology Literature Update on Melanocytic Nevi and Pigmented Lesions in the Pediatric Population Current Dermatology Reports Springer Nature Link