Which of the following organs is the most common site of origin of the tumour associated with the Zollinger-Ellison syndrome: (A) Duodenum, (B) Lymph nodes, (C) Spleen, (D) Pancreas
Answer is A. Gastrin producing endocrine tumour is often found in the duodenal loop,although it also occurs in the pancreas,especially in the head. Bailey & Love ,26th, 1055.