When a portion of the aorta is replaced surgically, the aneurysm is removed and cannot recur in that location. If there is only one segment of the aorta that is abnormal, once that segment has been replaced, the risk of aortic aneurysms forming elsewhere is rare though not unlikely.
The risk is much higher for patient with systemic congenital diseases like Marfan syndrome. Patients who undergo endovascular repair, have their aneurysm "excluded" from the circulation, but not excised and replaced.
The endograft may rarely migrate and the aneurysm will start growing up again.
Therefore, almost all patients who have had abdominal aortic aneurysm repair should undergo regular ultrasound imaging, particularly those who have had endovascular repair.