Insulinoma other diagnostic studies

Alternative tests
Sometimes, angiography with percutaneous transhepatic pancreatic vein catheterization to sample the blood for insulin levels is required. Calcium can be injected into selected arteries to stimulate insulin release from various parts of the pancreas, which can be measured by sampling blood from their respective veins. The use of calcium stimulation improves the specificity of this test. During surgery to remove an insulinoma, an intra-operative ultrasound can sometimes localize the tumour, which helps guide the surgeon in the operation.