noninvasive papillary squamous cell carcinoma in situ of extrahepatic bile duct
noninvasive papillary squamous cell carcinoma in situ of extrahepatic bile duct
noninvasive papillary squamous cell carcinoma in situ of extrahepatic bile duct
noninvasive papillary squamous cell carcinoma in situ of extrahepatic bile duct