Fig. 1From: Polyarteritis nodosa isolated to the testis and urinary bladder in the setting of cryptorchidism: a case report and literature reviewBladder and testis histology. Hematoxylin and eosin stains. Sections of both bladder (left) and testis (right) demonstrate active small and medium vessel vasculitis with predominantly mononuclear infiltrate and fibrinoid medial necrosis. Scale bars shownBack to article page