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Large infrarenal fusiform abdominal aortic aneurysm, demonstrating maximum transverse diameter of 10.3 cm and AP diameter of 9.8 cm. The craniocaudal extent is 15.6 cm, with the superior extent commencing at approximately the level of the renal arteries and the distal portion extending to the aortic bifurcation. There is a contained rupture of the aortic aneurysm into the IVC, with premature contrast opacification of the IVC and common iliac veins, i.e. aortocaval fistula. This also accounts for the poor contrast opacification of the iliac arteries on the arterial phase. No evidence of active haemorrhage into the retroperitoneum.