Necrotizing systemic vasculitis with features of both Wegener's granulomatosis and Churg‐Strauss vasculitis

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Abstract
We describe a patient who had nasal biopsy‐demonstrated eosinophilic vasculitis and renal biopsy‐demonstrated necrotizing glomerulonephritis with tissue eosinophilia. Despite corticosteroid therapy, the patient's renal function deteriorated, and nodular pulmonary infiltrates developed. Both conditions responded dramatically when cyclophosphamide was added to the treatment regimen. The renal disease activity was monitored with the aid of cytodiagnostic urinalysis, a technique of limited, albeit well‐established, validity in monitoring renal allograft patients for signs of tissue rejection. This technique provided an improved, semi‐quantitative method for examining urine sediment and, in this patient, was helpful as a measure of renal disease activity.

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