They often manifest as a concentric thickening of the bile duct, coupled with infiltration ... typically friable and do not invade through the ductal epithelium. As such, papillary lesions may ...

Cholangiocarcinoma is classified according to its growth pattern: mass-forming, periductal-infiltrating, or intraductal-growing type. The majority of cholangiocarcinomas occur at the common ...

A study on endoscopic intraductal radiofrequency ablation ... Ampullary Tumors: Tumors that occur at the ampulla of Vater, where the bile duct and pancreatic duct converge. Endoscopic Papillectomy ...