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  • Title: Renal biopsy morphology in renal transplantation. A comparative study of the light-microscopic appearances of biopsies from patients treated with cyclosporin A or azathioprine prednisone and antilymphocyte globulin.
    Author: Farnsworth A, Hall BM, Ng AB, Duggin GG, Horvath JS, Sheil AG, Tiller DJ.
    Journal: Am J Surg Pathol; 1984 Apr; 8(4):243-52. PubMed ID: 6369996.
    Abstract:
    Nephrotoxicity is a major side effect of cyclosporin A (CSA) when used in renal transplantation, and the distinction between nephrotoxicity and rejection is important in patient management. One hundred twenty-five renal biopsies were examined from 56 patients entered into a controlled clinical trial aimed at comparing the efficacy of CSA therapy alone to a combination of prednisone, azathioprine, and antilymphocyte globulin (AZA). In order to define the histopathology of rejection and nephrotoxicity, all the biopsies were evaluated in a semiquantitative manner by an observer unaware of the clinical state of the patient. Comparison of the morphological appearances of 32 biopsies from patients on CSA, and 22 biopsies from AZA-treated patients performed during clinically apparent rejection episodes showed that the histological patterns of rejection were the same in both treatment groups. Comparison of the morphological features of 34 biopsies from patients receiving CSA and 13 from patients receiving AZA, performed during prolonged periods of post-transplant renal failure, who eventually recovered on continuation of original therapy, showed that there were no morphological features specific to the CSA-treated group. Five patients on CSA had oliguria which was prolonged by CSA nephrotoxicity. Thirteen biopsies from all five patients showed a diffuse interstitial fibrosis that was peculiar to this group of patients.
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