Umbilical part of left branch of hepatic portal vein
Pars umbilicalis rami sinistri venae portae hepatis
- Related terms: Umbilical part; Left branch - Umbilical part
Definition
The umbilical part of the left branch of the hepatic portal vein is the sagittal continuation (following the transverse part) of the left branch of portal vein in the left lobe of liver.
The umbilical part of the left branch of the hepatic portal vein (UPLPV) gives rise to several branches that supply different segments of the liver. According to the study by Najah et al., the UPLPV typically has branches that supply segments II, III, and IV of the liver.[1] Specifically:
1. Segment II: Usually supplied by a single large vein in 90% of cases.
2. Segment III: Constantly has one vein arising from the left horn of the UPLPV.
3. Segment IV: Most of the veins to this segment originate from the right horn of the UPLPV, with a mean number of 5 branches (range 2-8).
Additionally, the study by Minami et al. highlights the presence of the left cranio-lateral portal branches, which arise from the cranial part of the UPLPV and supply the left lateral sector in approximately 40% of patients.[2]
References
1.Segmental Branching Pattern of the Left Portal Vein: Anatomical Characteristics and Clinical Implications.Najah H, Ammar H, Gupta R, et al.Clinical Anatomy (New York, N.Y.). 2018;31(8):1122-1128. doi:10.1002/ca.23009.Details
2.Study of the Portal Branches Arising From the Cranial Part of the Umbilical Portion of the Left Portal Vein: Implications for Anatomic Right Hepatic Trisectionectomy.Minami T, Ebata T, Yokoyama Y, et al.World Journal of Surgery. 2020;44(12):4231-4235. doi:10.1007/s00268-020-05753-2.
