Behrooz Zandi - MD, Associate Professor. Radiology Dept., Imam Reza Hospital, Mashhad University of Medical Sciences (MUMS), Mashhad, Iran.
Mahyar Mohammadi Fard - MD, Assistant Professor. Radiology Dept., Imam Reza Hospital, Birjand University of Medical Sciences, Birjand, Iran.
Mahdi Farzad Nia - MD, Associate Professor. Pathology Dept., Imam Reza Hospital, MUMS, Mashhad, Iran.
Mojtaba Ramazani - MD, Resident. Radiology Dept., Imam Reza Hospital, MUMS, Mashhad, Iran.

  Abstract Embolism of the femoral artery by an echinococcus cyst is extremely rare and is due to rupture of an intracardiac hydatid cyst. We report the case of a ۱۴-year-old boy who was admitted to our clinic with the diagnosis of arterial occlusion of the right lower extremity. Preoperative angiography revealed an ileofemoral embolic occlusion. During surgery, multiple hydatid cyst components causing femoral artery occlusion were found and excised. This case emphasizes that, in endemic countries, primary vascular echinococcosis should be considered in the differential diagnosis of arterial occlusion.     Keywords: Arterial occlusive diseases, echinococcosis, femoral artery; hydatid cyst, case report