Resection of Colorectal Liver Metastases with Major Vessel Involvement.

Simple Summary: Liver resection for colorectal liver metastases (CRLM) with major vessel involvement is challenging and valid data on outcomes are still lacking. We analyzed data of 32 hepatectomies combined with 35 major hepatic vessel resections and reconstructions with special regard to surgical approaches, histopathological findings and outcome. The vena cava inferior was resected and reconstructed in 19, the portal vein in 6 and a hepatic vein in 10 cases. Histology confirmed a vascular infiltration in 6/32 patients. In conclusion, liver resections with vascular resection/reconstruction are rare, but can be performed with low morbidity and mortality and histological vessel infiltration occurs seldom. Background: Treatment of CRLM with major vessel involvement is still challenging and valid data on outcomes are still rare. We analyzed our experience of hepatectomies with resection and reconstruction of major hepatic vessels with regard to operative and perioperative details, histopathological findings and oncological outcome. Methods: Data of 32 hepatectomies with major hepatic vessel resections and reconstructions were included. Results were correlated with perioperative and oncological outcome. Results: Out of 1236 surgical resections due to CRLM, we performed 35 major hepatic vessel resections and reconstructions in 32 cases (2.6%) during the study period from January 2008 to March 2023. The vena cava inferior (VCI) was resected and reconstructed in 19, the portal vein (PV) in 6 and a hepatic vein (HV) in 10 cases. Histopathological examination confirmed a vascular infiltration in 6/32 patients (VCI 3/17, HV 2/10 and PV 1/6). There were 27 R0 and 5 R1 resections. All R1 situations affected the parenchymal margin. Vascular wall margins were R0. Ninety-day mortality was 0. The median overall survival (OS) for the patient group with vascular infiltration (V1) was 21 months and for the V0 group 33.3 months. Conclusion: Liver resections with vascular resection and reconstruction are rare and histological vessel infiltration occurs seldom. In cases with presumed vascular wall infiltration, liver resection combined with major vessel resection and reconstruction can be performed with low morbidity and mortality. We prefer a parenchymal sparing liver resection with vascular resection and reconstruction to achieve negative resection margins, but in technically difficult cases with higher risk for postoperative complications, tumor detachment from vessels without resection is a most reasonable surgical alternative. [ABSTRACT FROM AUTHOR]