[Hyperinsulinism. Neurological and psychiatric aspects (author's transl)].

A case of a patient with hyperinsulinism due to insulinoma associated with neurological and psychiatric disturbances including EEG alterations is reported. The hunger test as well as the i.v. tolbutamid test proved to be of diagnostic importance. In addition, the electroencephalographic studies combined with blood sugar analyses before and after 50 g glucose, orally, showed a reversibility of the EEG alterations together with normalization of the blood surgar levels. These results point to the possibility of differentiating biochemical from structural cerebral lesions associated with hyperinsulinism.