Abstract
A 77-year-old man was admitted to our hospital complaining of pain in pulsating masses in bilateral inguinal regions. He had undergone bilateral graft implantation using a Y-shaped Cooley Dacron graft 16 years previously for arteriosclerotic obliteration. Angiography demonstrated bilateral femoral pseudoaneurysms. The graft aneurysms were partially resected and replaced with Hemashield knitted Dacron grafts. The pathological diagnosis was rupture of bilateral non-anastomotic aneurysms. Gliding and force were considered to be the causes of the aneurysm. Careful long-term follow up is necessary for patients who have undergone Dacron graft implantation.