Pancreas divisum: its association with pancreatitis.

Thirty-three patients with pancreas divisum studied by endoscopic retrograde cholangiopancreatography (ERCP) are described. Documented pancreatitis was present in fifteen patients, and another eleven had recurrent episodes of pain typical of pancreatitis. The major papilla was cannulated in all patients, but the duct of Wirsung was opacified in only twenty-eight and showed changes of pancreatitis in one. Attempts were made to cannulate the minor papilla in fifteen of the thirty-three patients and were successful in four. The duct of Santorini showed typical changes of pancreatitis in one. One patient had pancreatic cancer, and the duct of Wirsung demonstrated only nonspecific abnormalities. In only two cases was pancreatitis due to alcohol abuse. The high incidence of pancreatitis and pancreatic-like pain in patients with pancreas divisum, may be due to the very small ampulla of the duct of Santorini which in these patients drains the majority of the pancreas, creating a marked relative stenosis of the ampulla. Surgery for relief of pain was required in five patients. The operation of choice, when pancreatitis involves the dorsal pancreas, appears to be distal resection with drainage.