PMC4532015_01
Necrotizing vasculitis of medium sized artery with thrombosis, inflammatory infiltrates in arterial wall and adventia. X100
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Findings were typical of necrotizing vasculitis (Fig. 1a). Renal angiography showed multiple microaneurysms which were all consistent with the diagnosis of polyarteritis nodosa (Fig. 1b).
Multiple microaneuryms on renal subtraction angiography
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The computerized tomography (CT) of the abdomen and pelvis confirmed these findings (Fig. 2) and also showed foci of abnormal soft tissue adjacent to the areas of both ureteral narrowings without evidence of mass or lymphadenopathy.
Abdominal CT showing bilateral hydronephrosis with dilated renal pelvis
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The other ureteral stent was removed the next day and a final excretory urography was done 2 months after the initiation of medical treatment and was normal (Fig. 3).