Fig. 6.

a–d A patient with right lobe and left lateral segmental atrophy associated with cholangiocarcinoma. a Diagram representing a variant segment IV duct draining into the common hepatic duct (CHD) (RASD right anterior sectoral duct, RPSD right posterior sectoral duct, RHD right hepatic duct, LHD left hepatic duct, IV segment four duct). b Endoscopic retrograde cholangiopancreatogram (ERCP) demonstrates the normal calibre segment IV duct (arrow) draining into the common hepatic duct, inferior to the hilar stricture. c, d CT demonstrates atrophy of the right lobe and left lateral segments, and hypertrophy of segment IV