Abstract
Subclinical rejection (SCR) is associated with chronic allograft nephropathy. Therefore, early detection and treatment of SCR through a protocol biopsy (PB) can reduce the incidence of pathologic changes. This study evaluates the impact of early detection and treatment of SCR using a routine PB 2 weeks after kidney transplantation (KT) by examining histologic outcomes 1 year later. We reviewed 624 KT recipients at the Samsung Medical Center between August 2012 and December 2018. Protocol biopsy was planned 2 weeks and 1 year after transplantation. We compared the histologic changes between the 2 biopsies. After a propensity score matching analysis, we divided the patients into 2 groups: the proven normal group (n=256) and the rejection group (n=96) at the PB taken 2 weeks post-transplant. The rejection group showed no significant difference from the normal group in the flow of graft function or the Kaplan-Meier curve for graft survival. In the histologic outcomes, the pathologic differences between the groups significantly improved between the 2 time points. Treating SCR through a PB 2 weeks after KT can contribute to the maintenance of graft function and improve histologic changes 1 year after KT.
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