21 July 2014 : Original article
Outcome of Kidney Transplants for Adults with Hemolytic Uremic Syndrome in the U.S.: A Ten-Year Database AnalysisAlfonso H. Santos Jr.ACDEF, Michael J. CaseyE, Xuerong WenABCDE, Ivan ZendejasD, Chirag FalduAF, Shehzad RehmanD, Kenneth A. AndreoniDE
Ann Transplant 2014; 19:353-361
BACKGROUND: There is currently no large study of the U.S. transplant registry comparing the outcome of kidney transplantation for adults with and without hemolytic uremic syndrome (HUS). To date, information on the outcome of transplants for HUS in the U.S. is derived from single or combined-centers studies, but none has been of a nationwide scope.
MATERIAL AND METHODS: We retrospectively studied a US registry for the outcome of 323 kidney transplants in adults with HUS and of 121 311 transplants in adults with other renal diseases during the period 1999–2009. We analyzed patient, over-all, and death-censored graft survival in the 5 years following transplantation using Kaplan-Meir curves and Cox hazard models.
RESULTS: In the 5 years following kidney transplantation, patient mortality was not significantly different [Hazard Ratio (HR) 1.27, 95% Confidence Interval (CI) 0.78–2.08], but death-censored graft loss was twice as common (HR 2.05, 95% CI 1.53–2.73) for allograft recipients whose native kidney disease was HUS compared to other transplant recipients. The subgroup (n=40 cases) with post-transplant HUS recurrence had a 5-year graft loss rate 5 times that of the subgroup (n=283 cases) without HUS-recurrence (graft survival 14.7% vs.77.4%, log rank 116.5; p<0.001).
CONCLUSIONS: In the largest US series to date of kidney transplants for adults with HUS, 5-year patient survival was not different, but graft outcome was inferior in recipients whose native renal disease were HUS compared to recipients with other kidney diseases. Native kidney HUS is associated with a 2-fold increased risk of death-censored graft loss after kidney transplantation.
Keywords: database, Hemolytic-Uremic Syndrome, Kidney Transplantation
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