Osteochondromas are the most common benign bone tumors. Vascular complications are unusual, with false arterial aneurysms being the majority among them. Although there are several reports of false aneurysms because of an exostosis in the femoro-popliteal region, cases presenting with a false aneurysm of the brachial artery are quite rare. Many suggestions have been made regarding prevention, diagnosis, and treatment of these false aneurysms, although there are no official guidelines. Therefore, this report aims to present 2 unusual cases of patients with a false aneurysm in the femoral and brachial artery, respectively, because of an exostosis. Literature data are discussed and useful conclusions regarding optimal management are made.
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