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The Pitfalls of Left Trisectionectomy or Central Bisectionectomy for Biliary Cancer: Anatomical Classification Based on the Ventral Branches of Segment VI Portal Vein Relative to the Right Hepatic Vein

  • Original Article
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Journal of Gastrointestinal Surgery Aims and scope

Abstract

Backgrounds

Some patients have P6a running on the ventral side (Ventral-P6a), relative to the right hepatic vein (RHV).

Study Design

Forty-one patients who underwent left trisectionectomy or central bisectionectomy for biliary cancer were enrolled. We compared the anatomical features using 3D images and surgical outcomes between patients with Ventral-P6a (n = 17) and those with P6a running on the dorsal side relative to the RHV (Dorsal-P6a; n = 25). Moreover, the liver volume by hand-tracing 2D axial images was compared to the volume calculated using the 3D images.

Results

The frequency of complete exposure of RHV on the transection plane was less in Ventral-P6a (12 vs. 76%; p < 0.001), and the frequency of supraportal type of right posterior hepatic artery (RPHA, 29 vs. 4%, p = 0.020), the presence of inferior RHV (47 vs. 12%, p = 0.011), and the angle between the transection plane of segment VI and VII (S6–S7angle, 29.0° vs. 4.9°; p < 0.001) were greater in Ventral-P6a than in Dorsal-P6a. In Dorsal-P6a, the volume of posterior section calculated using 2D images was greater than that calculated using 3D images (404 vs. 370 mL; p = 0.004). The incidence of daily diuretic administration in Dorsal-P6a was greater than in Ventral-P6a (88 vs. 54%, p = 0.035).

Conclusion and Relevance

In Ventral-P6a, the complete exposure of RHV was rare in left trisectionectomy or central bisectionectomy. Surgeons should preoperatively recognize the course of RPHA, the presence of inferior RHV, and the S6–S7angle. In Dorsal-P6a, the volume of posterior section, which tended to be overestimated using 2D images, was smaller than that in Ventral-P6a.

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Abbreviations

RHV:

Right hepatic vein

P6:

The branches of segment VI of the portal vein

Ventral-P6a:

The P6a running across the ventral side of right hepatic vein

P6a:

The ventral branches of segment VI of the portal vein

Dorsal-P6a:

The P6a running on the dorsal side of the right hepatic vein

CT:

Computed tomography

mL:

Milliliters

PHLF:

Posthepatectomy liver failure

ISGLS:

International Study Group of Liver Surgery

IRHV:

Inferior right hepatic vein

RPHA:

Right posterior hepatic artery

POD:

Postoperative day

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Authors and Affiliations

  1. Division of Hepato-Biliary-Pancreatic Surgery, Shizuoka Cancer Center, 1007, Shimo-Nagakubo, Sunto-Nagaizumi, Shizuoka, 4118777, Japan

    Yusuke Yamamoto, Teiichi Sugiura, Yukiyasu Okamura, Takaaki Ito, Ryo Ashida & Katsuhiko Uesaka

  2. Division of Radiology, Shizuoka Cancer Center, Shizuoka, Japan

    Takeshi Aramaki

Authors
  1. Yusuke Yamamoto
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  2. Teiichi Sugiura
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  3. Yukiyasu Okamura
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  4. Takaaki Ito
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  5. Ryo Ashida
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  6. Takeshi Aramaki
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  7. Katsuhiko Uesaka
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Correspondence to Yusuke Yamamoto.

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Yamamoto, Y., Sugiura, T., Okamura, Y. et al. The Pitfalls of Left Trisectionectomy or Central Bisectionectomy for Biliary Cancer: Anatomical Classification Based on the Ventral Branches of Segment VI Portal Vein Relative to the Right Hepatic Vein. J Gastrointest Surg 21, 1453–1462 (2017). https://doi.org/10.1007/s11605-017-3486-y

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  • DOI: https://doi.org/10.1007/s11605-017-3486-y

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