Journal Article

Reproducibility of the Banff schema in reporting protocol biopsies of stable renal allografts

James Gough, David Rush, John Jeffery, Peter Nickerson, Rachel McKenna, Kim Solez and Kiril Trpkov

in Nephrology Dialysis Transplantation

Published on behalf of European Renal Association - European Dialysis and Transplant Assoc

Volume 17, issue 6, pages 1081-1084
Published in print June 2002 | ISSN: 0931-0509
Published online June 2002 | e-ISSN: 1460-2385 | DOI: http://dx.doi.org/10.1093/ndt/17.6.1081
Reproducibility of the Banff schema in reporting protocol biopsies of stable renal allografts

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Background. There is evidence that biopsy of stable renal allografts may be of value in predicting chronic allograft nephropathy, the main cause of graft loss. However, the reproducibility of such histological evaluation has not been tested in this setting. We tested the reproducibility of the Banff schema for this purpose.

Methods. We rated acute and chronic changes in 184 protocol biopsies. Individual pathologists at two different Canadian transplant centres reported independently.

Results. There was agreement in 73.53, 42.86, and 77.08% of cases in assigning a diagnosis of acute rejection, borderline changes (as defined in the schema), and no acute rejection, respectively. Applying kappa statistics, there was very good agreement in making the diagnosis of acute rejection vs no acute rejection (kappa 0.77). There was good inter‐observer agreement in scoring glomerulitis, intimal arteritis, interstitial infiltrates, tubulitis, and arteriolar hyalinosis. Rating chronic changes also gave good inter‐observer agreement (kappa=0.53, 0.65, and 0.62, respectively, for mild, moderate, and severe chronic allograft nephropathy). Agreement on transplant glomerulopathy was, however, poor.

Conclusions. We conclude that the Banff classification provides a reproducible method for the histological assessment of protocol renal allograft biopsies in stable grafts. Such biopsies may be valuable in detecting subclinical rejection and early chronic allograft nephropathy and may also be used as surrogate end‐points in the evaluation of therapy to prevent the latter.

Keywords: Banff; inter‐observer agreement; protocol renal biopsy; rejection

Journal Article.  1998 words. 

Subjects: Nephrology

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