Figure 3d. Large pseudocyst due to transection of the pancreatic duct in a 37-year-old man several weeks after blunt trauma. (a) Axial contrast-enhanced CT scan shows a large, loculated fluid collection (*) within the lesser sac, between the fragments of the pancreatic head and body. (b) Axial contrast-enhanced CT scan obtained after percutaneous drainage shows a catheter (arrowheads) within the pseudocyst. (c) ERCP image shows extravasation of contrast material (arrowheads), thus confirming the transection of the pancreatic duct. Note the drainage catheter within the collection (arrow). A stent was placed in the pancreatic duct during endoscopy (not shown). (d) Axial contrast-enhanced CT scan obtained several weeks after drainage shows resolution of the pseudocyst. Note the stent in the pancreatic duct (arrowhead) and the drainage catheter at the former site of the pseudocyst (arrow). (e) ERCP image obtained the same day as d shows no extravasation of contrast material, thus confirming the integrity of the pancreatic duct.