Melanocytic nevi and melanoma: unraveling a complex relationship Oncogene Word Root: Melano Wordpandit 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 Lesions Part 3 GASTROINTESTINAL HEMORRHAGE (2): Melena. Melena, the passage of black, tarry stools, usually implies blood loss greater than 500 ml originating anywhere between the oropharynx and the right hemicolon. Melena occurs most often, Skin lesions are categorized into melanocytic and non melanocytic, each Download Scientific Diagram