Fig. 2From: Occult mucin-producing cholangiocarcinoma in situ: a rare clinical case with difficult tumour stagingMultidetector row computed tomography. The S1 cyst (pink arrow head) connected with the right hepatic duct (blue arrow head). The extrahepatic bile ducts were diffusely dilated (red arrow head). The tumour mass, stricture, and wall thickness were not evident in either cyst or the entire bile duct. The green arrow head shows the S4 cyst. a Axial image. b Coronal imageBack to article page