Pigmented Lesion on the Hard Palate AFP Melanocytic nevi and melanoma: unraveling a complex relationship Oncogene Melanocytic nevi Clinical Tree 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 Pigmented oral compound nevus of retromolar area A rare case report ScienceDirect