Intraaortic growth of hydatid cysts causing occlusion of the aorta and of both iliac arteries: case report.

A woman who had been operated on previously for a paraspinal hydatid cyst presented with claudication of the lower limbs. Computed tomographic and magnetic resonance images showed multiple cysts in the soft tissues of the back, retroperitoneum, and lumen of the aorta and iliac arteries. Occlusion of the aorta and iliac arteries by recurrent hydatid cysts after previous surgery was confirmed with angiography and subsequent surgical exploration. The authors present the imaging findings of this unusual manifestation of cystic echinococcosis.