2009 Volume 24 Issue 2 Pages 184-189
A 59-year-old man with the main symptom of chronic diarrhea was diagnosed as Zollinger-Ellison Syndrome because of an elevated serum gastrin level; however, no tumor was visualized by the first abdominal CT. Selective arterial secretagogue injection test by calcium was performed. The results indicated a duodenal or pancreatic head tumor. The patient was referred to us, and at that time the CT examination at our hospital showed a tumor in the dorsal site of the pancreatic head. The patient underwent enucleation of the tumor. Histopathological examination showed that the tumor was a gastrin-positive pancreatic neuroendocrine tumor. The serum gastrin level decreased to within the normal range on the first postoperative day, and the patient was discharged on the 11th postoperative day. Selective arterial secretagogue injection test by calcium is useful for the localization of gastrinoma.
