Fig. 1

Preoperative imaging findings. a Preoperative abdominal computed tomography scan. Axial view (left) and coronal view (right) showed an enlarged low-attenuation mass that was 80 mm in diameter. The mass involved the S5 segment of the liver (arrowhead) and the hepatic flexure of the transverse colon (large arrow). A nodule was observed in the transverse mesocolon (small arrow). * indicates cavernous hemangioma. b Preoperative colonoscopy. An elevated lesion was detected (arrowhead) on the transverse colon, which was a result of compression from the tumor