<prompt> In case of carcinoid tumor which site is having least potential for malignancy -LungStomachSmall IntestineAppendix  <response>: Ans is a ie lung Were you thinking appendix ? Have a look at this table from Harrison 17e. 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 Meckels 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 