Abstract
Purpose
Left trisectionectomy (LT) extending to the segment I with bile duct resection for perihilar cholangiocarcinoma (PHC) is a technically demanding procedure with high morbidity. Liver transection during LT is generally conducted to expose the right hepatic vein (RHV) on the remnant side. In clinical practice, we have often encountered a discrepancy between the theoretical RHV-oriented plane and the actual right intersectional plane.
Methods
To enable anatomical LT safely, the three-dimensional right intersectional transection plane based on portal inflow was investigated using multidetector-row computed tomography, and it was compared to the theoretical RHV-oriented plane in 100 patients with hepatobiliary disease.
Results
The posterior portion of RHV just below the diaphragm was supplied by the dorsal portal branches of segment VIII in 85 cases of 100 (85.0%). The median volume of this portion was 82 mL (25–169 mL). On the other hand, the anterior region of the peripheral RHV was supplied by a few small ventral portal branches of segment VI in 24 of 90 cases (26.7%). The median volume of this portion was 53 mL (20–104 mL). In ten cases with a large inferior RHV, the RHV trunk was relatively short and did not reach the caudal part of the liver.
Conclusions
The portal inflow-oriented right intersectional plane does not coincide with the RHV-oriented plane in most cases. The cranial part of the actual transection plane becomes hollow, whereas the caudal part is protruded in relation to the RHV. Hepatobiliary surgeons should recognize this complicated transection plane to avoid postoperative complications when performing LT for PHC.
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IH: data collection or management and manuscript writing/editing; MO: data analysis; HY: data collection or management; KF: data collection or management; MM: data analysis; HS: protocol/project development and manuscript writing/editing. All authors read and approved the manuscript.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required.
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Hosokawa, I., Ohtsuka, M., Yoshitomi, H. et al. Right intersectional transection plane based on portal inflow in left trisectionectomy. Surg Radiol Anat 41, 589–593 (2019). https://doi.org/10.1007/s00276-018-2135-9
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DOI: https://doi.org/10.1007/s00276-018-2135-9