Published online Jun 18, 2021. doi: 10.5500/wjt.v11.i6.231
Peer-review started: February 9, 2021
First decision: March 17, 2021
Revised: March 18, 2021
Accepted: May 20, 2021
Article in press: May 20, 2021
Published online: June 18, 2021
Venous drainage from the liver is known to have many variations. The variations have a direct bearing on invasive procedures performed by transplant surgeons, interventional radiologists, and medical practitioners with an interest in treating liver diseases.
The right hepatic vein (RHV) drainage patterns are particularly important in transplantation procedures. Therefore, the RHV variations were evaluated in this study.
The objective of this study was to document RHV drainage patterns. The information would provide important information that would help to optimize outcomes during invasive liver procedures.
In this study, 230 contrast-enhanced computed tomography scans were independently examined by two radiologists. The venous drainage patterns were described in three categories: (1) tributaries to the RHV; (2) variations at the hepatocaval junction; and (3) accessory RHVs.
Conventional anatomic arrangements of the hepatic veins were present in only 39% of the individuals. The anatomic variations we encountered included accessory RHVs (49%), inferior RHV draining segment VI (45%), middle RHV (4%), Nakamura and Tsuzuki type I variations (70.3%), type II variants (20.3%) type III (5.1%) and type IV variants (4.2%).
There was significant variation in RHV patterns in this population. The variations have great relevance to operative procedures on the liver. Any surgeons performing operations in patients from the Caribbean diaspora must be cognizant of these variations.
The direction of the future investigations stimulated by this research would be to evaluate other associated anatomic anomalies and to compare the results to global statistics.