Fig. 1

Abdominal CT images prior to surgical excision. a An oversized mass shadow of mixed density extrudes towards the front of the left hepatic lobe. An irregular cystic portion can be observed with scattered patch- and nodal-like calcification. b–d The signal of lesion tissue was not obvious under enhanced scan, while a contrast scan reveals a substantial portion to be enhanced. A mass-like shadow with relatively low density is noted in the internal area of the neighboring left hepatic lobe. On enhanced CT, the margins of arterial and delayed phases are significantly enhanced, whereas the equilibrium phase is unclear. The boundary of the neighboring anterior gastric wall and lesser curvature is unclear. A strip-like low-density filling defect is observed in the left portal vein, which is unclear distally