CT study shows dilated beaded main pancreatic duct measures about 22 mm with associated marked atrophy of the pancreatic parenchyma, dilated side branches of the pancreatic duct giving a "chain of lakes sign", multiple variable-sized stones are seen within the main pancreatic duct and its side branches
An ill-defined hypodense mass-like lesion is seen involving the pancreatic uncinate process measures about 2 x 2.5 cm shows mild enhancement in the post-contrast study with mildly blurred surrounding fat planes and multiple small regional lymph nodes
The distal common bile duct shows multiple variable-sized large stones, are seen obstructing its lumen with subsequent moderate intra- and extra-hepatic biliary radicles dilatation
Distended gallbladder with no intraluminal stones