In 1955, Zollinger and Ellison described two patients with peptic ulcer disease in the jejunum and an islet cell tumor of the pancreas.14 It is now understood that the predominant feature of the syndrome (Zollinger- Figure 15-3. Distal pancreatectomy with splenectomy for a potentially malignant lesion. A, Incision along the retroperitoneum above and below the pancreatic tail. B, Digital palpation for a small tumor in the tail of the pancreas. C, Division of short gastric vessels. D, Division of...