Background: Isolated iliac artery aneurysms are rare and occur predominantly in men at
an older age. Such aneurysms can rupture into an adjacent organ (such as the bowel, bladder or
ureter) or into the adjacent common iliac vein, resulting in an arteriovenous fistula. INTRODUCTION:
Formation of an internal iliac arteriovenous fistula caused by spontaneous rupture of an
atherosclerotic iliac artery aneurysm wall is an exceedingly rare yet serious complication.
Case Presentation: This article presents a case of an internal iliac arteriovenous fistula caused by
rupture of an atherosclerotic giant iliac artery aneurysm.
Conclusion: Rapid diagnosis and meticulous surgical technique improve outcomes in patients with
this rare vascular complication.