[Peroperative localization of insuloma using staged portal vein insulin assay. Apropos of a case]. / Localisation peropératoire de l'insulinome par dosage étagé de l'insuline portale. A propos d'un cas.

The diagnosis of insulinoma is easily done now but, in many cases, it is still difficult to locate it without the use of invasive procedures. With selective angiography and percutaneous transhepatic catheterization of the portal vein however, failure is reduced to about 4%. We report a case of a double localisation of insulinoma, revealed by an intraoperative catheterization of the splenic vein. The advantages of this method are discussed.