Liver Transplantation for Cholangiocarcinoma: Charting a Path With Lessons Learned From Center Experience.

Background: While liver transplantation (LT) with neoadjuvant chemoradiation is increasingly utilized for the management of unresectable cholangiocarcinoma (CCA), data on post-LT survival are limited.

Methods: We identified 844 patients who underwent LT (2002-2019) for nonincidental (CCA listing) or incidental (CCA on explant, not at listing) CCA in the Scientific Registry of Transplant Recipients. Kaplan-Meier and multivariable proportional hazards regression methods evaluated the effects of patient characteristics, donor type, transplant era (before/after 2010), and center volume (center-level CCALTs/active year) on the risk of graft failure and patient mortality.

Results: One center performed >12 CCALTs/y, and the rest performed ≤4. Five-year graft survival was 50.6%. Multivariable models demonstrated laboratory model of end-stage liver disease ≥40 versus <15 and center volumes of 1, >1 to ≤2, and >2 to ≤4 CCALTs/y compared to >12 were associated with increased risk of graft failure and mortality (all ≤ 0.002). Extra vessel use was associated with center volume. Among all recipients, extra vessel use occurred in 55.4% of CCALTs performed at the highest volume center and in 14.0% of cases at centers having ≤4 CCAs/y ( < 0.05).

Conclusions: Center volume-related differences in outcomes and extra vessel use highlight the importance of establishing a unified, effective treatment protocol and the potential utility of regionalization of LT for CCA.