Biliary complications after liver transplantation: A computed tomography and magnetic resonance imaging pictorial review

Figure 9 Enlarged ampullary papilla occurring years after liver transplantation and causing minimal cholestasis. T2-weighted imaging in the coronal plane demonstrates an enlarged ampullary papilla (arrowhead) protruding in the duodenal lumen (arrow). Ultrasonography-endoscopy confirmed the enlarged ampullary papilla and biopsy was performed, which excluded malignancy and confirmed the diagnosis of papillary stenosis (i.e. sphincter of Oddi dysfunction); sphincterotomy was then performed.