A 69-year-old man had a sudden gluteal pain, genital numbness, and hematuria. Physical examination Large pulsatile abdominal mass Proximal aortic flow at 50 mL per heartbeat Flow to the fistula was 30 mL per heartbeat Radiology results CT angiography of the abdomen showed a 10 cm abdominal aortic aneurysm with an aortocaval fistula (Fig. on left). MRI pathlines (blood velocity map) showed a jet at the connection point (Figure on right).
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