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Aortocaval fistula is an uncommon complication of ruptured abdominal aorta aneurysm (AAA). It accounts for 3-6% of all ruptured cases. The AAA usually ruptures to the retroperitoneum space or peritoneal cavity; rarely do they rupture into the IVC forming an aortocaval fistula.
We report a case of aortocaval fistula that was found during an elective abdominal aortic aneurysm repair. A 60 years old gentleman presented with lethargy and worsening shortness of breath for 3 days duration. No history of abdominal pain or back pain. Clinically he was hypotensive and there was a pulsatile central abdominal mass. Computed tomography of the abdomen shows 8.7 x10 x 12 cm infrarenal abdominal aortic aneurysm that extend to the bifurcation of aorta. There was an aortocaval fistula noted. There was no evidence of leak or dissection. Open Abdominal Aortic Aneurysm repair was done. The fistula was closed within the sac with a monofilament polypropyelene sutures. Post operatively patient developed hospital acquired pneumonia and prolonged ileus. He was discharged well on post operative day 10.
Aortocaval fistula is an uncommon complication of AAA. However the diagnosis should be considered as it may lead to massive bleeding intraoperatively.
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