“…We were able to classify aneurysms related to bypass procedures into 2 categories: (1) early-formed aneurysms, which generally are pseudoaneurysms and are related to technical failure in surgery 5-8,12,14,17,21,22 ; (2) late-formed aneurysms, which are related to hemodynamic stress factors on the bypass site. 5,6,[9][10][11]13,15,16,18,19,23 Early-formed aneurysms are generally pseudoaneurysms. They are caused by faulty surgical techniques, as example number of sutures applied is important factor as reported by Robertson and Robertson.…”