preoperative endoscopic retrograde cholangiopancreatography ( 50 patients ) or intraoperative pancreatic ductograms ( 44 patients ) demonstrated dilated or obstructed major pancreatic ducts in 50 patients ( 59 % ) , nonvisualization of the distal duct in 10 patients ( 12 % ) , and normal or small sized ducts in 34 patients ( 40 % ) .
C0008310
endoscopic retrograde
C0030288
pancreatic ducts