title: Drug-induced granulomatous interstitial nephritis.
abstract: Among 22 cases of drug-induced acute interstitial nephritis (AIN), noncaseating interstitial granulomas were found in eight cases (36%). Acute renal failure (ARF), oliguric in three patients, appeared within 1-20 days after the beginning of therapy. Clinical symptoms suggesting a hypersensitivity reaction were unusual, marked blood eosinophilia was absent, and immunologic tests were inconstantly positive. The discovery of interstitial granulomas may be a clue to the diagnosis of drug-induced AIN, especially when the inflammatory infiltrates do not contain eosinophils. Since significant residual renal impairment may be observed the benefit of early steroid therapy must be debated.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006099:Granuloma / Q000139:chemically induced* / Q000175:diagnosis / Q000276:immunology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009395:Nephritis, Interstitial / Q000139:chemically induced* / Q000175:diagnosis / Q000276:immunology