Malignant insulinoma is an extremely uncommon tumor that is usually accompanied by severe hypoglycemia that is difficult to manage. At this time, the long-term effect of 177Lu-DOTATATE (lutetium [Lu-177]- DOTA-Tyr3-octreotate) on this tumor is not well known. | Long-term effect of 177Lu-DOTATATE on severe and refractory hypoglycemia associated with malignant insulinoma