A case of anuric acute renal failure due to bilateral renal artery obs
truction in a 42 year-old man is presented. The obstruction was caused
by bilateral thrombosis secondary to arteritis. Autopsy showed granul
omatous and necrotizing vasculitis in both main renal arteries. Scarri
ng and also necrotizing vasculitis were found from interlobular to arc
uate renal arteries. The present case indicates that vasculitis should
be considered when there is renal artery obstruction in young patient
s.