Vascular echinococcosis.

Three patients with arterial echinococcosis presented with chronic or acute arterial occlusion. One case diagnosed as Leriche's syndrome was found at surgery to have aortic occlusion caused by hydatid cysts; arterial reconstruction was performed by aortoiliac interposition of a woven Dacron vascular graft. In the other 2 cases presenting with acute femoral or brachial artery occlusion, embolectomy revealed hydatid cysts as the cause of occlusion.