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 Melanocytic nevi Clinical Tree Mucocutaneous Pigmented Lesions, Nevi and Melanoma (Chapter 4) Pediatric Head and Neck Pathology Differential diagnosis of an oral mucosal pigmented lesion: a case of essential melanosis Pigmented oral compound nevus of retromolar area A rare case report ScienceDirect Pigmented Lesion on the Hard Palate AFP