Ex-vivo Liver Resection and Autotransplantation for Liver Malignancy : A Large Volume Retrospective Clinical Study.

Objective: To assess the effectiveness of optimized ex-vivo liver resection and autotransplantation (ELRA) for treating liver malignancies.

Background: ELRA is a promising surgery for radical resection of conventionally unresectable tumors, despite the disappointing long-term prognosis during its developmental stages. A recent multicenter study reported 5-year overall and disease-free survival rates of 28% and 20.8%, respectively.

Methods: We retrospectively analyzed data of patients who underwent ELRA for advanced liver cancers between 2009 and 2022. We applied ELRA via our novel surgical indication classification system where the surgical risk with curative intent for advanced liver malignancy was controllable using the ex-vivo approach. The ELRA was optimized for determinacy, predictability, and controllability via the precision liver surgery paradigm.

Results: Thirty-seven cases with liver malignancies were enrolled. The operative time and anhepatic phase duration were 649.6±200.0 and 261.2±74.5 minutes, respectively, while the intraoperative blood loss was 1902±1192 mL. Negative resection margins were achieved in all patients, and the 90-day morbidity at Clavien-Dindo IIIa/IIIb and mortality rates were 27.0% and 24.3%. Post-ELRA 1-, 3-, and 5-year actual overall survival rates were 62.2%, 37.8%, and 35.1%, respectively, and 1-, 3-, and 5-year actual disease-free survival rates were 43.2%, 24.3%, and 18.9%, respectively.

Conclusions: Long-term outcomes of ELRA under precision liver surgery for advanced liver malignancy were favorable. Appropriate criteria for disease selection and surgical indications and optimized procedures together can improve surgical treatment and patient prognosis.