Intrarenal rupture of the abdominal aorta: CT features.

Computed tomography in patients with a ruptured abdominal aortic aneurysm usually demonstrates the aneurysm with blood in the posterior para- and perirenal spaces. Hemorrhage into the adjacent perirenal space occurs because the aorta, via the renal vascular pedicle, is in continuum with this compartment. The kidney is commonly displaced but not compromised functionally. We report a case of an asymptomatic chronic intrarenal rupture of a focal aortic aneurysm that presented as a mass in a nonfunctioning kidney.