Table 2. Branching patterns of the right hepatic bile duct.

Configuration Description		Kitami et al [9]a (n=202)	Chen et al [13]a (n=56)	Ohkubo et al [8]b (n=110)
Type 1	Conventional: RPD joining RAD to form RHD	64%	59%	74%
Type 2	Trifurcation	5%	13%	5%
Type 3	RPD joining LHD	17%	9%	12%
Type 4	Aberrant drainage of RPD into CHD	3%	18%	5%
Type 5	Others	11%	2%	4%

CHD, common hepatic bile duct; LHD, left hepatic duct; RAD, right anterior duct; RHD, right hepatid duct; RPD, right posterior duct.

^aResults of four- or eight-detector row CT.

^bResults of four- or eight-detector row operative cases.