Abstract
Percentage of normal glomeruli at renal biopsy has been shown to be an independent risk factor for end-stage renal disease (ESRD). A risk stratification scoring system has recently been devised for patients with antineutrophil cytoplasmic antibody (ANCA) positive renal vasculitis based on three clinicopathological features: percentage of normal glomeruli, tubular atrophy and eGFR at the time of biopsy. Patients are categorised into high, medium and low risk according to their 'Renal Risk Score'.
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