Journal of Research in Medical Sciences1735-199511420061107Spontaneous kidney rupture in a patient with polyarteritis nodosa270272ENAhmadMohammadiMohammad RezaGharaatiDep. of Urology, Isfahan University of Medical Sciences. gharaati@resident.mui.ac.irMohammad RezaEbadzadeh2006110720061107Polyarteritis nodosa (PAN) is a systemic necrotizing vasculitis that affects the medium- and small-sized arteries. It involves the renal arterioles in approximately 80% of cases, but spontaneous retroperitoneal hemorrhage is a rare complication of PAN. We report a case of spontaneous kidney rupture in a patient with PAN. KEY WORDS: Polyarteritis nodosa, hematoma, kidney rupture