Correlation of histologic findings on preimplant biopsy with kidney graft survival

Authors


Liise K. Kayler, Division of Transplantation & Hepatobiliary Surgery, Department of Surgery, University of Florida College of Medicine, 1600 SW Archer Rd, Room 6142, PO Box 100286, Gainesville, FL 32610-0286, USA. Tel.: +1 352 265 0606; fax: +1 352 265 0678; e-mail: liisekayler@yahoo.com

Summary

Kidney biopsies are being used to evaluate marginal deceased donor organs, but, the literature on the utility of this practice remains conflicting. We re-examined this issue by performing a multivariate analysis of 597 kidney transplant recipients. The presence of moderate arteriosclerosis and/or moderate arteriolosclerosis (MA), defined as ≥25% luminal compromise, was a significant predictor of graft outcome in standard criteria donors (multivariate, P = 0.01) and in expanded criteria donors (ECD) as defined by UNOS criteria (univariate P = 0.02). One-, 3-, and 5-year overall allograft survival with MA was 71%, 58%, and 40%, respectively. Increasing degrees of glomerulosclerosis (GS) were associated with earlier graft failure on univariate (P = 0.03) but not multivariate analysis (P = 0.36). GS > 20% and interstitial fibrosis >25% had a low frequency in the material reviewed, likely reflecting our organ utilization practices, and did not have a demonstrable effect on graft outcome. Clinical parameters independently associated with worse graft function were ECD status (P < 0.05), retransplantation (P = 0.004), recipient age (P < 0.05), and delayed graft function (P < 0.0001). Donor vascular disease is an independent risk factor for suboptimal graft survival. Great caution should be exercised in the decision to transplant kidneys with moderate arterial and/or arteriolar luminal narrowing.

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