Pediatric axillary artery aneurysm.

Nonaortic aneurysms are rare in the pediatric patient population with axillary artery aneurysms accounting for <5% of these. The most common cause of pediatric nonaortic aneurysm is trauma followed by arterial dysplasia. There are only 14 reported cases of idiopathic true axillary aneurysm in the pediatric patient. We present a rare case of an idiopathic isolated right axillary artery aneurysm in a 13-year-old girl, managed with surgical repair with autogenous venous interposition. A thorough workup should be performed in pediatric patients with peripheral aneurysms to determine the etiology, which may guide the clinical management.