(a) A 66-year-old male with colorectal cancer presenting with right liver lobe metastasis. Computed tomography shows a small left liver (the planned surgery was a right hepatectomy), insufficient for the future right hepatectomy resection. Red arrow: liver metastasis. Green arrow: left portal vein. (b) Portography acquired immediately before portal vein embolization shows a normal portal vein anatomy. Green arrow: right portal vein; red arrow: left portal vein. (c) Portography immediately after portal vein embolization shows satisfactory occlusion of the anterior and posterior sectorial portal vein branches. Red arrow: left portal vein; green arrows: right portal branches occluded. (d) Computed tomography 4 weeks after portal vein embolization shows a significant increase in left liver volume (hypertrophy rate of 51%). Red arrows: coils placed in the right portal vein branches; black arrows: definition of the liver ischemic line between the right and left hepatic lobes.