Figure 40. Chronic pancreatitis with obstructive stones. (A) Contrast-enhanced CT section at the level of the head of the pancreas shows the stones and pancreatic duct dilatation (arrowheads). (B) MRCP performed before endoscopic stone extraction reveals the filling defect (arrow) and the marked pancreatic duct dilatation; no anatomic variant is seen, and the common bile duct is slightly enlarged. (C) After stone removal, MRCP shows a substantial decrease in pancreatic duct and common bile duct caliber.