Femoral vein aneurysm: a case report and review of the literature.

Primary venous aneurysms are rarely encountered lesions. Case reports have been described throughout the venous system. The lesions are usually symptom-free being found as a subcutaneous mass, an incidental finding on an imaging study, or during the work-up for deep venous thrombosis. However, embolism and rupture have been rarely described. A femoral vein aneurysm is reported, along with a current review of the literature of venous aneurysms.