Case report: Mucinous cholangiocarcinoma featuring a multicystic appearance and periportal collar in imaging

A case of mucinous cholangiocarcinoma (CC), a rare histological type of CC, featuring unusual images is reported. The patient was hospitalized because of acute development of jaundice and fever. Computed tomography demonstrat ed multiple cystic lesions in the liver and a band-like low density area pa rallel to the intrahepatic portal vein, a so-called 'periportal collar'. En doscopic cholangiography revealed a stricture of the hepatic duct with slig ht upstream dilatation. Cytology of the bile juice and fine-needle aspirati on of the cystic lesion in the liver disclosed mucinous carcinoma. The pati ent died of multiorgan failure 3 weeks after admission. The autopsied liver showed that multiple mucus lakes were lined with adenocarcinoma cells and signet ring cells were floating in the mucus lakes. The cancer cells had sp read along the portal tract and invaded into the hepatic parenchyma. (C) 19 99 Blackwell Science Asia Pty Ltd.