Card 14 / 33: A 65 year old man presents with periumbilical abdominal pain which often radiates to the back. The pain has been present intermittently for over 3 years. Approximately 5 years ago he stopped drinking alcohol heavily. He used to drink two six-packs of beer daily, more on weekends. His physical exam is unremarkable. An abdominal CT scan reveals occasional small pancreatic calcifications. An endoscopic retrograde cholangiopancreatography shows a dilated, irregular pancreatic duct with dilated side branches. Which of the following tests will most likely be abnormal in this patient?
A) Lactulose hydrogen breath test
B) Heliobacter pylori serology
C) Fecal elastase
D) Fecal leukocytes
E) Vitamin C level

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