“…The pseudoaneurysm can be caused by central venous cannulation. A few cases of pseudoaneurysm of the subclavian artery, the internal mammary artery, the intercostal artery, the brachiocephalic trunk, the thyrocervical trunk and the innominate artery following subclavian vein catheterization attempts have been reported as the cause of spontaneous hemothorax [7,8]. Other causes include traumas, infections, vasculitis, and tumors.…”