Giant aneurysmal degeneration after subintimal fluoropolymer-coated paclitaxel-eluting stent implantation for the superficial femoral artery occlusion: a case report

The aneurysmal degeneration, the so-called 'low echoic area' around the stent by ultrasound, is a relatively common finding after Eluvia DES implantation. It is thought to have little association with clinical events up to 2 years, however, the nature of this phenomenon remains unclear, and some cases present with clinical worsening. In this case, the development of a giant aneurysm could be induced by the overlapping stent not only by the local drug and polymer overdose but also by the increased mechanical force exerted against the fragile outer wall of the subintimal structure.