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  • Title: Protocol biopsies in kidney transplant recipients: histologic findings as prognostic markers for graft function and outcome.
    Author: Masin-Spasovska J, Spasovski G, Dzikova S, Grcevska L, Petrusevska G, Lekovski Lj, Popov Z, Ivanovski N.
    Journal: Transplant Proc; 2005 Mar; 37(2):705-8. PubMed ID: 15848508.
    Abstract:
    The aim of the present study was to identify subclinical and borderline rejections as well as histological markers of chronic allograft nephropathy (CAN) among protocol biopsies performed at 1 and 6 months after living related kidney transplantation to assess their possible implications for graft function. Twenty paired allograft biopsies performed at 1 and 6 months were reviewed according to the Banff scoring scheme. The mean ages of donors and recipients were 59.6 +/- 13.8 and 34.4 +/- 8.7 years, respectively. Among all biopsies only 10% (4/40) showed no histopathological lesions. At the first month borderline rejection was shown in 35% and subclinical rejection in 10% of patients. At 6 months the proportion of findings was even higher, namely, 40% and 30%, respectively. When divided according to donor age, donors above 55 years showed a mean CAN score of 2.33 +/- 1.56 which increased to 5.0 +/- 2.26 on the 6 month biopsy (214.3%). Unexpectedly, the proportion of these changes in the younger donor group also increased by 173.3%, which might have been explained by the greater number of borderline and subclinical rejections in the younger donor group at the 1 month biopsy. In conclusion, 1 month biopsy may be valuable to determine borderline and subclinical rejection and to prognosticate the outcome of renal allograft function. Our findings suggest a greater susceptibility of histological deterioration among the older donor population. However, the presence of an untreated rejection in the younger donor pool leads to a rapid impairment of the graft function accelerating the process of chronic allograft nephropathy.
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