alexa An Imaging Study of a Ramification Pattern of Right Posterior Portal Vein Branch
ISSN: 2157-7099

Journal of Cytology & Histology
Open Access

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Research Article

An Imaging Study of a Ramification Pattern of Right Posterior Portal Vein Branch

Paschalis Gavriilidis1*, Shi Yuan2, Li Weixia3, Chai Limin3 and Shen Baiyong2

1Department of Surgical Oncology, Theageneio Anticancer Hospital, Thessaloniki, Greece

2Department of Hepatobiliary and pancreatic surgery

3Department of Radiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China

*Corresponding Author:
Paschalis Gavriilidis, MD
Department of Surgical Oncology
Theageneio Anticancer Hospital
Thessaloniki, Greece
Tel: +30 6977826253
Fax/Tel: +30 231 0 898314
E-mail: [email protected]

Received date: Janurary 05, 2011; Accepted date: February 02, 2011; Published date: February 04, 2011

Citation: Gavriilidis P, Yuan S, Weixia L, Limin C, Baiyong S (2011) An Imaging Study of a Ramification Pattern of Right Posterior Portal Vein Branch. J Cytol Histol 1:110. doi:10.4172/2157-7099.1000110

Copyright: © 2011 Gavriilidis P, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Background: Our aim was to study the ramification pattern of the Right posterior portal vein branch and to compare our findings to Couinaud classification of the liver. Study design: The study protocol was approved by the institutional review board and written informed consent was obtained from all patients before procedures were performed. Our study includes 104 patients, all were Chinese who underwent helical Computed Tomography during Arterial Portography (CTAP). Subsequently, 3 dimensional portograms were reconstructed to verify the ramification patterns of the portal vein. Portal branching patterns of the right hemiliver were assessed. Results: In all 104 patients examined, three distinct types of anatomical branching patterns of the Right posterior portal vein branch were observed: . Type I: In 52 patients out of 104 (50%), the Right posterior portal branch represents a single trunk forming an arch like pattern and sending multiple branches to segment 6 and segment 7, see Figure 1 and Figure 2. . Type II: In 9 out of 104 patients (9%), the Right posterior portal vein branch showed trifurcation into posterosuperior, posteroinferior, and intermediate branches. The intermediate branch occupied the segmental border between segments S6 and S7, see Figure 3 and Figure 4. . Type III: In 43 out of 104 patients (41%), the Right posterior portal branch bifurcates into Posterosuperior P7 and Posteroinferior P6 third order portal branches as described by C. Couinaud in his homonymous segmental liver classification, see Figure 5 and Figure 6. Conclusions: According to Couinaud classification, the Right posterior portal branch bifurcates into third order Postero superior P7 and Posteroiferior P6 portal branches to supply segments S7 and S6. Our findings showed however, that it happened only in 41% of the cases. In 50% of the findings, the right posterior portal branch represented a single trunk forming an arch like pattern sending multiple branches. The smallest group of 9% showed trifurcation into posterosuperior, posteroinferior, and intermediate branches. Therefore we conclude that there is a discrepancy between the Atlas model of liver segmentation and our imaging findings. Based on these findings we can consider a right lateral sector as a unique segment in 50% of cases.

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