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Pathology of renal transplantation.

Renal transplantation is the most appropriate form of treatment for end-stage renal disease in all age groups. We present the experience of two hospitals in the pathology of kidney allograft. Renal biopsy is the most adequate method for the follow-up of these patients, because it permits the differential diagnosis of acute and chronic rejection, transplant glomerulopathy, recurrent and "de novo" glomerulonephritis and immunosuppression nephrotoxicity, mainly by cyclosporine A. We present the pathology features of all these entities, and study the representativity of the biopsy for diagnosis of rejection. The actuarial survival of the graft is 82% and 71% at 1 and 5 years, respectively.