Montross B, Rivero M, Khan S, et al. - In view of the reported association of failure of the sac to regress at 12 months after endovascular aneurysm repair (EVAR) with higher long-term mortality independent of reinterventions or endoleaks in a large Vascular Quality Initiative database, researchers here examined whether sac behavior at 12 months affects survival, reintervention, and endoleak-free survival via reviewing their single-center closely monitored cohort of patients after elective EVAR. Inclusion was performed of 403 patients undergoing EVAR (15 fenestrated EVARs) between 2001 and 2018 with an imaging study at 1 year postoperatively (±6 months). Findings suggest that failure of sac diameter decrease at 12 months is not correlated with survival, but is linked with new endoleaks and reinterventions, in closely monitored patients. They emphasize undertaking more closure monitoring of patients with stable sacs given the significantly higher endoleak and reintervention rate than those with sac size decrease.