[Percutaneous transhepatic portal vein catheterisation in the diagnosis of hormone-producing tumours in the splanchnic area (author's transl)].

During 1980, percutaneous transhepatic portal vein catheterisation was carried out in eight patients with suspected hormone-producing tumours in an attempt to localise these. Seven patients with hyperinsulinism were suspected of having an insulinoma and one a gastrinoma. There were no complications following the catheterisation, and difficulties were reduced by the use of a special catheter. The blood samples were examined by radio-immunological methods for insulin or gastrin. On the basis of localised rise in hormone level, it was possible to diagnose three insulinomas and one gastrinoma in the pancreas. The beta-cell tumours were removed by enucleation or segmental resection, the gastrinoma by a Whipple's operation. Three patients showed an insulin gradient and sub-total pancreatectomies were performed. In one patient there was no definite abnormality in the insulin level and an operation has so far not been performed. Our experience indicates that this technique is difficult, bu is nevertheless a reliable method for localising hormone-producing tumours and surgery should not be carried out without it.