Overview
Inferior mesenteric artery (IMA) aneurysms are rare, constituting approximately 1% of visceral artery aneurysms, and are frequently discovered incidentally 1. These aneurysms carry a significant risk of rupture and have traditionally been managed surgically or endovascularly.Diagnosis
Incidental detection: Often identified incidentally through imaging studies such as CT scans 1.
Imaging modalities: Computed tomography (CT) angiography is crucial for diagnosis, visualizing aneurysm size and potential connections like arteriovenous fistulas 1.Management
First-line treatments: Surgical resection and endovascular intervention are typically recommended due to the high risk of rupture 1.
Conservative management: Possible in selected cases where aneurysm shrinkage occurs with intraluminal thrombus formation, monitored with serial imaging 1.Special Populations
No specific guidelines: The provided abstracts do not cover management in pregnancy, pediatrics, elderly, or specific comorbidities 1.Key Recommendations
Consider conservative management for IMA aneurysms showing signs of spontaneous thrombosis and shrinkage on serial imaging (Evidence: Weak) 1.
Primary interventions such as surgical resection or endovascular repair should be considered for high-risk aneurysms to prevent rupture (Evidence: Expert opinion) 1.
Serial imaging follow-up is essential for monitoring changes in aneurysm size and thrombus formation in conservatively managed cases (Evidence: Weak) 1.References
1 Kunioka S, Kitahara H, Yuasa N, Fujita M, Otani N, Kamiya H. Successful Conservative Management of Inferior Mesenteric Artery Aneurysm with Arteriovenous Fistula: A Case Report. Annals of vascular surgery 2020. link
2 Schaefer PJ, Charalambous N, Trentmann J, Schaefer FK, Gross J, Siggelkow M et al.. Leash your guiding catheter: or how to obtain a stable catheter position for crossover iliac embolization procedures. Cardiovascular and interventional radiology 2010. link