Skin lesions are categorized into melanocytic and non melanocytic, each Download Scientific Diagram 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, Melanocytic Nevi and their Association with Melanoma Cancer Enhancing melanoma detection through multiple datasets integration and robust deep learning Cluster Computing Springer Nature Link There are no 50 shades of melena, only one color: Black; and it's a color that smells bad. Otherwise it's not melena or it's derivatives (melenic, melanotic, melenatonic ) Great thread w a