Unexplained rupture after endovascular aneurysm repair

Area of Science:

• Vascular Surgery
• Medical Imaging
• Aneurysm Research

Background:

• Endovascular aneurysm repair (EVAR) is a common treatment for abdominal aortic aneurysms.
• Regular surveillance, including computed tomography angiography (CTA), is standard after EVAR.
• EVAR aims to exclude the aneurysm sac and prevent rupture.

Observation:

• A 70-year-old male experienced a late abdominal aortic aneurysm rupture 4 years post-EVAR.
• Preceding CTA scans showed successful aneurysm exclusion with no endoleak.
• The explanted stent graft was intact with effective sealing; no infection was noted.

Findings:

• The aneurysm rupture occurred despite a technically successful EVAR and unremarkable surveillance imaging.
• The rupture was deemed unpredictable and unexplained by standard imaging criteria.
• Imaging findings did not correlate with the eventual catastrophic failure.

Implications:

• Unremarkable imaging surveillance does not guarantee the prevention of late aneurysm rupture after EVAR.
• This case challenges the absolute reliability of current surveillance protocols in preventing EVAR failure.
• Further research may be needed to understand and predict late, unexplained EVAR failures.