Gastroenteropancreatic neuroendocrine tumors are classified based on their origin from the embryonic divisions of the alimentary tract into foregut (bronchial, stomach), midgut (small intestine, appendix, cecum) and hindgut (distal colon, rectum, genitourinary) tumours.
Carcinoid syndrome classification
Carcinoid syndrome staging
Atherosclerosis classification
Peptic ulcer classification
Colon polyps classification
Gastrointestinal varices classification
Sudden cardiac death classification
Carcinoid syndrome epidemiology and demographics