[False aneurysm of the femoral artery complicating exostosis]

A case of false aneurysm of the femoral artery due to an exostosis of the distal end of the femur is reported. The clinical diagnosis was confirmed by sonography and, especially, by a digitalized arteriography. The CT-scan showed the perforation of the arterial wall by the exostosis. The surgical operation involved the resection of the exostosis, the excision of the edges of the arterial lesion along with a venous patch. This type of complication due to an exostosis is quite rare and the discussion runs about the opportunity of systematic surgery of osteochondromas sitting close to a vascular course.