Inferior suprarenal artery aneurysm in polyarteritis nodosa.

A 16-year-old boy with the complaints of fever, abdominal pain, arthralgia and hypertension was found to have polyarteritis nodosa. Selective renal angiography disclosed a 5-mm microaneurysm of the right inferior suprarenal artery, which has not been previously reported in polyarteritis nodosa. Aside from the diagnostic view-point, some of the perirenal and retroperitoneal hemorrhages of unknown origin seen in polyarteritis nodosa might be due to the rupture of suprarenal artery aneurysms.