Although rarely seen, insulinomas are the most common neuroendocrine tumors of the pancreas. It can be life threatening due to hypoglisemia. Diagnosis is base on clinical and laboratory findings. Radiological findings are helpful to confirm the diagnosis and to determine surgical procedure. If no tumor found by radiological investigations, selective arterial calcium stimulation test can be performed for the diagnosis and localization. Here, we report a case of insulinoma which truly located only with the calsium stimulation test, and operated successfully.
Keywords: Hypoglycemia, insulinoma, calsium stimulation test