[Proximal abdominal aortic aneurysms after infrarenal aortic reconstruction]

Area of Science:

• Vascular Surgery
• Aortic Aneurysm Research
• Surgical Complications

Context:

• Sterile supraanastomotic abdominal aortic aneurysm (SS-AAA) is a rare but serious long-term complication following infrarenal aortic open reconstruction.
• Differentiating between true aneurysmal degeneration (proximal para-anastomotic abdominal aortic aneurysm - PPA-AAA) and anastomotic rupture with false aneurysm formation (proximal anastomotic false abdominal aortic aneurysm - PAF-AAA) is critical.
• The etiology is degenerative, distinct from infectious causes, with potential underreporting impacting true incidence rates.

Purpose:

• To differentiate between PPA-AAA and PAF-AAA, highlighting their degenerative etiology.
• To emphasize the necessity of long-term ultrasound surveillance for early detection of SS-AAA.
• To review diagnostic modalities and surgical repair challenges, presenting a case series.

Summary:

• SS-AAA, encompassing PPA-AAA and PAF-AAA, are degenerative complications requiring distinction from infectious etiologies.
• Long-term ultrasound follow-up is essential due to subtle pre-rupture clinical findings.
• Spiral CT and MR imaging are optimal diagnostic tools, while open repair faces challenges from scar tissue and visceral vessel involvement.

Impact:

• This study underscores the importance of vigilant surveillance and accurate diagnosis for managing SS-AAA.
• Understanding the nuances between PPA-AAA and PAF-AAA can guide surgical planning and improve outcomes.
• The findings suggest a potentially higher incidence of SS-AAA than previously reported, necessitating tailored follow-up protocols.