[Organic hyperinsulinism. Clinical aspects--diagnosis--therapy].

It is reported on the clinical experiences in the care of 19 patients with insulinoma. The relatively simple proof of the existence of an insulinoma which is possible by the determination of insulin is performed by the recognition of a pathognomonic insulin--blood glucose--quotient in fasting state and in the fasting test, respectively. Stimulation tests are less evident and do not lead to any further clinically relevant information. The difficulty of the diagnosis consists in the localisation of the tumour. Without clinically urgent necessity an operation without localisation of the tumour should not be performed.