Talk:Renal transplant pathology

Allograft biopsy categories (Banff 97):

Type	Key morphologic finding
Normal	no inflammation
Suspicious for acute rejection	focal mild tubulitis (1-4 mononuclear cells/tubular cross section)
Acute/active rejection	tubulitis (>4 mononuclear cells/tubular cross section); see separate table for grading
Chronic/sclerosing allograft nephropathy	interstitial fibrosis and tubular atrophy; see separate table for grading

Type

Key morphologic finding Acute/active rejection Acute/active rejection in allograft biopsies (Banff 97): Grade Key morphologic finding IA 4< mononuclear cell/tubular cross section or 10 tubular cells <10; >25% of parenchyma IB >10 mononuclear cell/tubular cross section or 10 tubular cells; >25% of parenchyma IIA mild-to-moderate intimal arteritis; <=25% of luminal area IIB severe intimal arteritis; >25% of luminal area III transmural arteritis and/or fibrinoid necrosis