The study compares two treatments for complex **iliac occlusive disease** (a blockage in the arteries in the pelvis). The **GORE® VIABAHN® VBX Balloon Expandable Endoprosthesis** is a special device used to keep these arteries open, like a tunnel. The study checks if this device works better than **bare metal stents**, which are small tubes used to open blocked arteries. The study involves adults who have symptoms when walking or resting due to this disease.

Participants must be 18 or older and can’t have certain health conditions or allergies. The study requires following up with the doctors and sticking to the plan. If you are eligible, it’s important to know that this study may require regular check-ups and some procedures.

• **Duration:** The study involves a series of follow-ups and may last over a year.
• **Visits:** Participants will need to attend regular doctor visits for check-ups.
• **Risks:** Risks include reactions to the device or procedures, and potential complications.