Assessing differences in growth and shape between symptomatic and asymptomatic abdominal aortic aneurysms

sAAA had larger increase in AAA volume and AFL volume over time when compared to aAAA (despite no difference in diameter, volume, or change in diameter). Despite no quantifiable differences in shape or curvature between aAAA and sAAA, sAAA had larger 3D-growth in the left lateral aneurysm neck compared to aAAA. Volumetric changes, shape, and 3D-growth may be better predictors of AAA rupture risk. However, larger scale studies are warranted to confirm these preliminary findings and explore the mechanisms underlying these differences.