Melanocytic nevi and melanoma: unraveling a complex relationship Oncogene Differential diagnosis of an oral mucosal pigmented lesion: a case of essential melanosis Pigmented Lesion on the Hard Palate AFP 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 Clinical features of cutaneous melanotic nevihead and neck region. a Download Scientific Diagram