[Diagnosis and surgical therapy of organic hyperinsulinism].

The diagnosis of an insulin producing tumour can be confirmed by a minimum of biochemical investigations. Its preoperative localisation is more difficult. Sonogram, Computertomogram, selective angiography and percutaneous transhepatic collecting of blood samples for insulin analysis from the portal system were preoperative measured to localize the tumours in 32 of 37 patients of our series. In 2 patients intraoperative tumour localisation by measurement of incorporated p32 proved to be effective. In B-cell-carinomas pancreas resection is the adequate therapy. With regard to the therapeutic effects a high risk is involved in the 'blind' left or right sited resection of non-localized tumours.