Melan Dx: a knowledge enhanced vision language framework improves differential diagnosis of melanocytic neoplasm pathology npj Digital Medicine 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, Deep learning finds convergent melanocytic morphology despite noisy archival slides ScienceDirect MSLO Melanocytic skin lesion ontology : Digital Medicine