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Vulnerability of Banff ABMR classification

2/17/2019

4 Comments

 
 An interesting study was published in recent issue of American Journal of Transplantation which looks at the way current Banff classification of Antibody Mediated Rejection (ABMR) is interpreted by Nephrologists and Renal Pathologists and its eventual implications.
The aim of this study was to determine how the Banff antibody‐mediated rejection (ABMR) classification for kidney transplantation is interpreted in practice and affects therapy. The Banff Antibody‐Mediated Injury Workgroup electronically surveyed clinicians and pathologists worldwide regarding diagnosis and treatment for 6 casebased scenarios. The participants’ (95 clinicians and 72 renal pathologists) assigned diagnoses were compared to the Banff intended diagnoses (reference standard). The assigned diagnoses and reference standard differed by 26.1% (SD 28.1%) for​ pathologists and 34.5% (SD 23.3%) for clinicians. The greatest discordance between the reference standard and clinicians’ diagnosis was when histologic features of ABMR were present but donor‐specific antibody was undetected (49.4% [43/87]). For pathologists, the greatest discordance was in the case of acute/active ABMR C4d staining negative in a positive crossmatch transplant recipient (33.8% [23/68]).
Treatment approaches were heterogeneous but linked to the assigned diagnosis. When acute/active ABMR was diagnosed by the clinician, treatment was recommended 95.3% (SD 18.4%) of the time vs only 77.7% (SD 39.2%) of the time when chronic active ABMR was diagnosed (P < .0001). In conclusion, the Banff ABMR classification
is vulnerable to misinterpretation, which potentially has patient management implications. Continued efforts are needed to improve the understanding and standardized application of ABMR classification in the transplant community.

What are your thoughts on this? Do we as Pathologists or Nephrologists face similar difficulties when dealing with ABMR and what is the best way to approach this issue?
4 Comments
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