Improved Survival Following Living Donor Liver Transplantation for Pediatric Acute Liver Failure: Analysis of 20 Years of US National Registry Data

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Abstract
This study estimated the utility of technical variant grafts (TVGs), such as split/reduced liver transplantation (SRLT) and living donor liver transplantation (LDLT), in pediatric acute liver failure (PALF). PALF is a devastating condition portending a poor prognosis without liver transplantation (LT). Pediatric candidates have fewer suitable deceased donor liver transplantation (DDLT) donor organs, and the efficacy of TVG in this setting remains incompletely investigated. PALF patients from 1995 to 2015 (age P < 0.001). TVGs accounted for only 25.7% of LT for PALF. In the adjusted model for wait‐list mortality, among other factors, increased age (subhazard ratio [SHR], 0.97 per year; P = 0.020) and access to TVG were associated with decreased risk (SHR, 0.37; P < 0.0001). LDLT recipients had shorter median waiting times compared with DDLT (LDLT versus DDLT versus SRLT, 3 versus 4 versus 5 days, respectively; P = 0.017). In the adjusted model for post‐LT survival, LDLT was superior to DDLT using whole grafts (SHR, 0.41; P = 0.004). However, patient survival after SRLT was not statistically different from DDLT (SHR, 0.75; P = 0.165). In conclusion, despite clear advantages to reduce wait‐list mortality, TVGs have been underutilized in PALF. Early access to TVG, especially from LDLT, should be sought to further improve outcomes.

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