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Surgical and Radiologic Anatomy

Published in:

01-05-2017 | Original Article

Portal supply of segment IV of the liver based on CT-scan

Authors: Roxane Maurer, Michel Rivoire, Valéria Basso, Pierre Meeus, Patrice Peyrat, Aurélien Dupré

Published in: Surgical and Radiologic Anatomy | Issue 5/2017

Abstract

Background

The portal vascularization of segment IV (S4) of the liver has not been well described. Knowledge of the portal supply to S4 is of great interest for liver surgery and for interventional radiological procedures. This study aimed to analyse the distribution of portal vein branches supplying S4.

Methods

We retrospectively analysed data from patients operated on for liver tumours between 2007 and 2016. Patients with involvement of S4 branches or the left portal vein, previous liver surgery or poor quality imaging were excluded. Branches originating from the right portal vein and/or from the transverse part of the left portal vein (TPLPV) and/or from the umbilical part of the portal vein (UPLPV) were identified.

Results

In 102 patients who underwent a right hepatectomy, S4 was vascularized by 2–8 branches of the left portal vein, with 84.3 % of patients having 3–6 branches. Only eleven patients (10.8 %) had portal branches originating from the TPLPV, with no impact on the number of branches coming from the UPLPV. Three patients (2.9 %) had one branch from the right portal vein. In patients with only two or three branches supplying S4, the branches had a larger diameter and typically arose from a short common trunk which divided further within its first centimetres.

Conclusions

Portal vascularization of S4 varies widely (2–8 branches) between patients and originates predominantly from the junction between the left portal vein and the round ligament. There is no anatomical rationale to divide S4 into S4a and S4b.

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Title: Portal supply of segment IV of the liver based on CT-scan
Authors: Roxane Maurer
Michel Rivoire
Valéria Basso
Pierre Meeus
Patrice Peyrat
Aurélien Dupré
Publication date: 01-05-2017
Publisher: Springer Paris
Published in: Surgical and Radiologic Anatomy / Issue 5/2017
Print ISSN: 0930-1038
Electronic ISSN: 1279-8517
DOI: https://doi.org/10.1007/s00276-016-1761-3

At a glance: The STEP trials

Springer Medicine

Portal supply of segment IV of the liver based on CT-scan

Abstract

Background

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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