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Published on: May 7, 2015
Propensity Score-matched Real-world Data: HCC Recurrence Rates After DBD Liver Transplantation in Times of Machine
Dominik Thomas Koch1, Lucca Pollety1, Malte Schirren1
1Department of General, Visceral and Transplantation Surgery, LMU University Hospital, LMU Munich, Munich, Germany.
Background:
Liver transplantation (LT) remains the most effective treatment for patients with hepatocellular carcinoma (HCC), offering 5-y recurrence rates as low as 15%. Recent advances in organ preservation, particularly hypothermic oxygenated machine perfusion (HOPE), have demonstrated the ability to attenuate ischemia-reperfusion injury (IRI). However, whether HOPE can reduce HCC recurrence rates by mitigating IRI remains an open question. In this study, we aimed to compare oncological outcomes after LT for HCC with and without the use of HOPE.
Methods:
We conducted a retrospective cohort study including 137 patients who underwent LT for HCC with grafts from donation after brain death. Risk factors for HCC recurrence were analyzed using Cox regression. To assess the impact of HOPE on oncological outcomes, propensity score matching was used to adjust for baseline differences.
Results:
Cox regression identified Milan Criteria status as a significant predictor of HCC recurrence. Among the 32 patients in the HOPE group, no HCC recurrence was observed over a median follow-up of 2.11 y. In contrast, within the control group of 105 patients, 8 (7.6%) experienced recurrence within 2 y posttransplantation. Although this translated into a significant difference in time-to-recurrence after propensity score matching, recurrence-free survival and overall survival did not differ significantly.
Conclusions:
Our findings suggest that HOPE treatment of donation after brain death liver grafts may reduce early HCC recurrence after LT. Although only nonsignificant trends were observed in recurrence-free survival and overall survival within the first 2 y posttransplant, these results underscore the potential of HOPE to influence oncological outcomes. Long-term follow-up, prospective randomized controlled trials, and basic research are warranted to further elucidate the role of HOPE and IRI.
