Thrombosis of a popliteal pseudoaneurysm secondary to an osteochondroma of the femur: an uncommon clinical case

Osteochondroma are the bone tumors most frequently found in adolescents or young adults. Most often discovered by accidental findings, they however may be diagnosed while some complications. They are commonly described as solitary findings while multiple exostoses are rather included in an inherited disease. We report the rare case of a 24-year-old patient with acute ischemia of popliteal artery pseudoaneurysm caused by a femur bone exostosis. He presented a severe and supported pain in the left leg. Clinical examination found acute limb ischemia. An angio-CT-scan showed a pseudoaneurysm thrombosis of popliteal artery with distal emboli. An exostosis of the femur bone just above the aneurysm was also found. In this dramatic presentation, a surgical treatment was performed and consisted of thrombectomy, excluding the popliteal aneurysm with a distal saphenous vein graft, excision of the exostosis, fibrinolysis and preventive anterior and posterior compartements fasciotomy.