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Extrahepatic right portal vein ligation allows parenchyma-sparing en bloc resection of segments 7, 8 and 4a for liver tumors engaging the right and middle hepatic veins.
Right trisectionectomy for posterior liver tumors engaging the right and middle hepatic veins may lead to post-hepatectomy liver failure if the anticipated liver remnant is small. In such patients we developed a parenchyma-sparing one-step approach, that includes extrahepatic right portal vein ligation accompanied by en bloc resection only of segments 7, 8 and 4a and resection of the right and middle hepatic veins. The technique was applied in 3 patients with normal liver function, where according to the preoperative computed tomography the volume of segments 1, 2 and 3 ranged between 17% and 20% of the total liver volume. In all patients liver biochemistry improved rapidly postoperatively and a doubling of volume of segments 1, 2 and 3 was achieved by the third postoperative week, as extrahepatic right portal vein ligation ameliorated reperfusion injury of the remaining segments 5 and 6 and induced hypertrophy of segments 1, 2, 3 and 4b. There was no mortality or long-term complications. Patients are alive and free of disease 74, 50 and 17 months after the operation, respectively. We propose that the term "extended upper right sectionectomy" may be considered for the en bloc resection of segments 7, 8 and 4a, in future revisions of the Brisbane 2000 terminology of hepatic anatomy and resections.
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