In some cases of insulinoma, a 72 h fasting test can produce negative results. 1,2 In Placzkowski and colleagues' study, the 72 h fast test result was negative in three of eight patients who had ...

Imaging tests, such as computed tomography (CT) scan or ultrasound, can also be used to find and diagnose an insulinoma. Zollinger-Ellison syndrome (ZES) is a rare digestive disease caused by a tumor ...