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Fig. 3B 60-year-old man with mass in uncinate process of pancreas
that proved to be pancreatic adenocarcinoma. Patient had elevated creatinine
and could not receive iodinated contrast material on CT. Axial late
arterial-phase gadolinium-enhanced T1-weighted fat-suppressed
gradient-recalled echo MR image shows 2.5-cm hypointense mass (short
arrow) in head of pancreas responsible for double duct sign seen on MR
cholangiopancreatography. Fat plane between superior mesenteric artery and
pancreatic mass (long arrow) is obscured, suggesting vascular
invasion.