Figure 1: Results of 75gOGTT (a) and glucagon stimulation test (b) before and after surgery. Abdominal dynamic computed tomography (c) demonstrated an enhanced tumor (arrow) in the tail of the pancreas in the early phase. Celiac angiography (d) showed tumor staining (arrow) in the area of the pancreas tail. The arterial stimulation and venous sampling (ASVS) test (e) showed that the serum concentrations of insulin obtained from the right hepatic vein were slightly increased after the injection of calcium into the proximal splenic artery.
