<prompt> In Werner Syndrome, most common site of Gastrinoma is?PancreasStomachColonSmall Intestione  <response>: Small Intestine REF: Harrisons Internal Medicine 17 edition Chapter 344, Advanced therapy in gastroenterology and liver disease 5th edition by Kenneth L. Franco, Theodore M. Bayless, Anna Diehl Page 156 Gastrimomas are either associated with MEN I syndrome 30 or sporadic 70. Duodenal gastrimomas is the most frequent site for both the forms Most gastrinomas 50-70 are present in the duodenum, followed by the pancreas 20-40 and other intraabdominal sites mesentery, lymph nodes, biliary tract, liver, stomach, ovary. Three cases with two extraabdominal sites have been described: gastrinomas of the left ventricular septum of the hea and non-small cell lung cancer. In MEN-1, the gastrinomas are also usually in the duodenum 70-90 or the pancreas 10-30, and they are almost always multiple._ 