Objectives: to assess size changes of the proximal aortic neck after endograft placement.

Conclusion: the infrarenal aortic neck demonstrates continued dilatation during follow-up after endograft placement.

This technique has relatively good results, considering the anatomic limitations of the aortic neck.

The proximal neck dimensions were measured perpendicular to the central lumen line of the aortic neck.

However, progressive changes in the morphology of the distal aortic neck may be responsible for procedural failure.

Detailed morphologic analysis of the aortic neck was serially performed for the thrombus group patients to assess changes in thrombus volume.