Fig. 4

A representative case of the extrahepatic type. a Transverse MDCT images in early arterial phase obtained in a 57-year-old man with hilar cholangiocarcinoma. RHA bifurcated into A8 and Apost + A5 (common trunk of Apost and A5), thereafter Apost + A5 bifurcated into Apost and A5. A8 and A5 extrahepatically branched off from RHA. A8 and 5 supply segment VIII and V, respectively. b Intraoperative photograph after left trisectionectomy with caudate lobectomy and hilar lymph node dissection. Stumps of A5 and A8 are shown. During hilar lymph node dissection, A5 and A8 were exposed and cut