Abstract

Gastroenteropancreatic endocrine tumors are rare and need a multidisciplinary approach. Some of them are only found in the pancreas: insulinomas, glucagonomas and VIPomas wether other are located in the duodenum or in the small intestine. Clinical presentation depends on the site of the primary tumor and whether they are functioning tumors. Best known functioning tumors are those secreting gastrin with the so-called Zollinger–Ellison syndrome. Endoscopic ultrasonography is not used in the first place. It is particularly sensitive for identification of small tumor like pancreatic insulinomas and in the context of MEN1. Fine-needle aspiration may give diagnosis but also prognosis informations.

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