Abstract
A 38-yr-old woman had fasting hypoglycemia, hyperinsulinemia and an arteriographically demonstrable insulinoma. One year after surgical resection, however, hypoglycemia recurred and an arteriogram demonstrated a recurrent intrapancreatic vascular mass. Because of anticipated complications of another surgical approach, the tumor was embolized arteriographically, using microfibrillar collagen. The patient''s fasting blood glucose and insulin levels improved rapidly. Eleven months after embolization, the patient remains well, with normal blood glucose levels.