2Schuhe SJ, Baron RL, Teefey SA, et al. CT of the extra- hepatic bile ducts:wall thickness and contrast enhancement in normal and abnormal duct. AJR,1990;154:79.
4Kalstskin G.Adenocarcinoma of tla hepatic duct at its bifurcation within the porta hepatis:an unusual tumor with distinctive clincal and pathological features[J].Amer J Med,1965,38(2):241-243.