Late non-anastomotic false aneurysm formation in femoropopliteal polyethylene terephthalate grafts.

Despite the proven reliability of polyethylene terephthlate (PET) grafts, structural defects resulting in graft rupture and false aneurysm formation have been sporadically described. Two cases of late, non anastomotic, false aneurysms of PET femoropopliteal grafts, are reported. The diagnosis is readily apparent on clinical examination and imaging studies, which display an aneurysm along the course of the graft, remote from the anastomosis. The extent of the repair depends on the extent of the degenerative process.