Very Long-term Survival of the Transplanted Kidney—Characteristics of Recipients

Abstract

BackgroundAfter kidney transplantation (KTx), donor- and recipient-dependent factors, as well as the immunosuppression protocol, may have an impact long-term graft function. The aim of this retrospective study was to identify and describe recipients from a single center who had their transplanted kidney survive for more than 20 years. MethodsThe database of KTx recipients was searched to find identify patients with a functioning kidney graft for >20 years. Clinical, demographic, and immunologic data were recorded and analyzed. Moreover, the Charlson Comorbidity Index was calculated. ResultsWe identified 25 patients, with graft survival of 23.9 ± 3.2 years (maximum, 31.5 years), with following characteristics: age at time of transplantation 36.2 ± 11.9 years; median of 4 human leukocyte antigen (HLA) mismatches; low risk of rejection (panel-reactive antibodies [PRA] 0%); and 14 recipients had delayed graft function (DGF) and 9 had a single episode of acute rejection successfully treated with steroid pulses. In 24 cases there was a deceased donor. There was a predominance of males aged <54 years. At 1 year after KTx, serum creatinine was 1.36 ± 0.26 mg/dL. All recipients were given cyclosporine + azathioprine + prednisone as primary immunosuppression. The majority of recipients have continued to visit the clinic on an oupatient basis, with a most recent creatinine average of 1.5 ± 0.82 mg/dL. ConclusionVery long-term kidney graft survival is most likely associated with a low risk of rejection (0% PRA pre-KTx), a relatively weak immunosuppression protocol, and optimal function at 12 months post-KTx.