Particular anatomical situation like wideneck aneurysms or a large neck/fundus ratio, located on an arterial bifurcation or a small artery, are still a challenge for endovascular coil occlusion. These are due to the risk of coil migration or coil protrusion into the parent vessels. In our study we describe the balloon assisted coiling technique regarding the efficacy and safety of its practice and the problems that could appear.