This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'In case of carcinoid tumor which site is having least potential for malignancy - \nSelect and explain. \nA. Lung, B. Stomach, C. Small Intestine, D. Appendix', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' ie lung Were you thinking appendix ? Have a look at this table from Harrison 17/e. Site of Carcinoid % of total Incidence of metastasis * Foregut Esophagus <0.1 ? Stomach 4.6 10 Duodenum 2.0 ? Gallbladder 0.3 17.8 Bronchus, lung, trachea 27.9 5.7 Pancreas 0.7 71.9 * Midgut Jejunum 1.8 58.4 Ileum 14.9J Meckel's diveicuhun 0.5 ? Appendix 4.8 38.8 Colon 8.6 51 Liver 0.4 32.2 Ovary 1.0 32 Testis <0.1 ? * Hindgut Rectum 13.6 3.9 Thus: Comparing from this table we see least potential for malignancy --> Rectum followed by bronchus & lung. Also note Maximum potential for malignancy --> Pancreatic carcinoid followed by small intestine MC site for carcinoid tumor --> Intestine or GIT as a whole Bronchus Hind MC)", 'role': 'assistant'}]