Background: True internal mammary artery aneurysms are rare but rupture has been described.
Case Report: A 39-year-old male patient with Marfan syndrome was diagnosed with large asymptomatic bilateral internal mammary artery aneurysms (IMAAs) on contrast-enhanced CT scan, without other arterial lesions. Both aneurysms were coil embolized, a stent graft was deployed in the left subclavian artery to cover a wide neck that precluded complete and safe embolization of the left IMAA. Reintervention on the right side was performed 5 years later due to recanalization. Eight years after the initial procedure, the patient presented with a type A aortic dissection that was successfully repaired.
Conclusions: Although extremely rare, endovascular treatment should be considered to prevent rupture of internal mammary artery aneurysms.
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