The forces generated by the stent and aortic recoil have a caudal component which over time may tend to dislodge the stent from the proximal neck. If the endograft is deployed in an aneurysm with a short proximal neck, or if there is insufficient columnar strength inherent in the device chosen, these forces could cause distal migration of the device with proximal endoleak and recurrent risk of AAA rupture.
Plain radiographs can sometimes suggest stent migration.