Supervivencia del injerto renal según la categoría de Banff 2013 en biopsia por indicación.

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Bibliographic Details
Title:	Supervivencia del injerto renal según la categoría de Banff 2013 en biopsia por indicación.
Alternate Title:	Renal graft survival according to Banff 2013 classification in indication biopsies.
Authors:	Arias-Cabrales, Carlos¹, Redondo-Pachón, Dolores¹, Pérez-Sáez, María José¹, Gimeno, Javier², Sánchez-Güerri, Ignacio², Bermejo, Sheila¹, Sierra, Adriana¹, Burballa, Carla¹, Mir, Marisa¹, Crespo, Marta¹, Pascual, Julio¹ julpascual@gmail.com
Source:	Nefrologia. nov/dic2016, Vol. 36 Issue 6, p660-666. 7p.
Abstract (English):	Introduction: The impact of acute rejection in kidney graft survival is well known, but the prognosis of other diagnoses is uncertain. We evaluated the frequency and impact on graft survival of different diagnostic categories according to the Banff 2013 classification in a cohort of renal transplant recipients. Material and methods: Retrospective study of 495 renal biopsies by indication in 322 patients from 1990-2014. Two independent observers reviewed the histological reports, reclassifying according to the Banff 2013 classification. Results: Of 495 biopsies, 28 (5.7%) were not diagnostic. Of the remaining 467, 10.3% were «normal» (category 1), 19.6% antibody-mediated changes (category 2), 5.9% «borderline» changes (category 3), 8.7% T-cell-mediated rejection (category 4), 23.4% interstitial fibrosis/tubular atrophy (IFTA) (category 5) and 26.5% with other diagnoses (category 6). As time after transplantation increases, diagnoses of categories 1, 3 and 4 decrease, while categories 5 and 2 increase. Worse graft survival with category 2 diagnosis was observed (45% at 7.5 years, HR 4.29 graft loss [95% CI, 2.39-7.73]; P<.001, compared to category 1). Grafts with «unfavourable histology» (chronic antibody-mediated rejection, moderate-severe IFTA) presented worse survival that grafts with «favourable histology» (normal, acute tubular necrosis, mild IFTA). Conclusions. The Banff 2013 classification facilitates a histological diagnosis in 95% of indication biopsies. While diagnostic category 6 is the most common, a change in the predominant histopathology was observed according to time elapsed since transplantation. Antibodymediated changes are associated with worse graft survival. [ABSTRACT FROM AUTHOR]
Abstract (Spanish):	íntroducción: El impacto del rechazo agudo en la supervivencia del injerto renal es bien conocido; sin embargo, el pronóstico de otras entidades es incierto. Evaluamos la frecuencia y el impacto en la supervivencia del injerto de las diferentes categorías diagnósticas según la clasificación Banff 2013 en una cohorte de trasplantados renales y su impacto en la supervivencia del injerto. Material y métodos: Estudio retrospectivo de 495 biopsias renales por indicación, en 322 pacientes entre 1990 y 2014. Dos observadores independientes revisaron los diagnósticos histológicos y reclasificaron según Banff 2013. Resultados: De 495 biopsias, 28 (5,7%) fueron no diagnósticas. De las 467 restantes, 10,3% fueron «normales» (categoría 1), 19,6% fueron cambios mediados por anticuerpos (categoría 2), 5,9% fueron cambios borderline (categoría 3), el 8,7% fueron rechazo mediado por células T (categoría 4), el 23,4% fue fibrosis intersticial/atrofia tubular (FIAT) (categoría 5) y el 26,5% fueron otros diagnósticos (categoría 6). Al aumentar el tiempo postrasplante, disminuyen los diagnósticos de categorías 1, 3 y 4 y aumentan los de la 5 y la 2. Observamos peor supervivencia en injertos con diagnósticos de categoría 2 (45% a 7,5 años; HR pérdida del injerto 4,29 [IC 95%: 2,39-7,73]; p < 0,001, con respecto a categoría 1). Los injertos con «histología desfavorable» (rechazo crónico mediado por anticuerpos, IFTA moderada-severa) presentan peor supervivencia que los injertos con «histología favorable» (normal, necrosis tubular aguda, FIAT leve). Conclusiones:La clasificación de Banff 2013 permite el diagnóstico histológico en el 95% de las biopsias por indicación. La categoría 6 es la más frecuente, pero se observa una modificación en la histopatología predominante según el tiempo postrasplante. Los cambios mediados por anticuerpos se asocian con peor supervivencia del injerto. [ABSTRACT FROM AUTHOR]
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Database:	MedicLatina

Description
Abstract:	Introduction: The impact of acute rejection in kidney graft survival is well known, but the prognosis of other diagnoses is uncertain. We evaluated the frequency and impact on graft survival of different diagnostic categories according to the Banff 2013 classification in a cohort of renal transplant recipients. Material and methods: Retrospective study of 495 renal biopsies by indication in 322 patients from 1990-2014. Two independent observers reviewed the histological reports, reclassifying according to the Banff 2013 classification. Results: Of 495 biopsies, 28 (5.7%) were not diagnostic. Of the remaining 467, 10.3% were «normal» (category 1), 19.6% antibody-mediated changes (category 2), 5.9% «borderline» changes (category 3), 8.7% T-cell-mediated rejection (category 4), 23.4% interstitial fibrosis/tubular atrophy (IFTA) (category 5) and 26.5% with other diagnoses (category 6). As time after transplantation increases, diagnoses of categories 1, 3 and 4 decrease, while categories 5 and 2 increase. Worse graft survival with category 2 diagnosis was observed (45% at 7.5 years, HR 4.29 graft loss [95% CI, 2.39-7.73]; P<.001, compared to category 1). Grafts with «unfavourable histology» (chronic antibody-mediated rejection, moderate-severe IFTA) presented worse survival that grafts with «favourable histology» (normal, acute tubular necrosis, mild IFTA). Conclusions. The Banff 2013 classification facilitates a histological diagnosis in 95% of indication biopsies. While diagnostic category 6 is the most common, a change in the predominant histopathology was observed according to time elapsed since transplantation. Antibodymediated changes are associated with worse graft survival. [ABSTRACT FROM AUTHOR]
ISSN:	02116995
DOI:	10.1016/j.nefro.2016.05.018