Localization of gastroentero-pancreatic (GEP) tumors

摘要: Publisher Summary This chapter discusses the localization of gastroentero-pancreatic (GEP) tumors. Tumors axis occur predominantly in pancreas, and rarely duodenum stomach. Occasionally tumors secreting GEP hormones may even be found ectopic sites, that is, kidney, ovary, thyroid (G cell), lung (bronchial carcinoid) or adrenal medulla, they apparently confined to a solitary lymph node. The experience 11 patients with organic hyperinsulinism, 7 hypergastrinema, 1 carcinoid syndrome whom percutaneous transhepatic portal pancreatic vein catheterization was carried out successfully. helped localize tumors, identify multiple establish diagnosis nesidioblastosis hyperplasia, hormone secretion by same tumor within pancreas. also venous sampling (THVS) is safe reliable procedure has become an important experiment evaluation angiographically negative functioning islet cell lesions. It believed method will play fairly major role adenomas normal angiographic studies previously surgical explorations. As no clinical study managed distinguish from those single hyperplasia nesidioblastosis, THVS choice. Portal concentrations number have been measured, including gastrin, glucagon, motilin, somatostatin, insulin, which prove useful further designed axis.