We report a case of isolated internal iliac aneurysm presenting with a big retroperitoneal cystic tumor, with reviewing the literature.
The case was a 71-year-old man who complained of ischuria and constipation caused by ruptured internal iliac aneurysm. Digital examination revealed a pulseless tumor and pelvic CT and US showed the big cystic lesion. The operation was performed under a diagnosis of primary retroperitoneal tumor, but a hematoma of 12×16 cm in size and right internal iliac aneurysm of 5×6 cm in size were presented. Right common iliac artery was ligated and endoaneurysmorraphy was performed. The artifical graft was replaced between the abdominal aorta and right external iliac artery.
Postoperative angiography showed that the patency of the graft was good. There was no finding of impared function of the rectum and bladder.