Transcatheter arterial embolization for segmental arterial mediolysis

Area of Science:

• Vascular Surgery
• Interventional Radiology
• Medical Case Reports

Background:

• Segmental arterial mediolysis (SAM) is a rare vascular disorder affecting the celiac and mesenteric arteries.
• SAM is characterized by fusiform aneurysms and normal-appearing intervening vessels.
• Diagnosis can be challenging, requiring exclusion of vasculitis.

Observation:

• This study reports on four patients with presumptive SAM, three of whom presented with ruptured aneurysms.
• Transcatheter arterial embolization was performed using coil embolization or N-butyl cyanoacrylate.
• No re-rupture occurred post-embolization.

Findings:

• One patient experienced a new dissection in the superior mesenteric artery nine months after embolization.
• Another patient died three months post-treatment from lower gastrointestinal tract perforation; the exact cause remains undetermined.
• Mesenteric ischemia secondary to embolization and underlying arteriopathy could not be excluded as contributing factors.

Implications:

• Transcatheter embolization demonstrates utility in managing SAM.
• The rapidly evolving nature of SAM necessitates vigilant, short-interval follow-up for patients undergoing mesenteric artery embolization.
• Further research is needed to understand the long-term outcomes and optimal management strategies for SAM.