Popliteal artery pseudoaneurysm secondary to hereditary multiple exostosis

A 25-year-old female patient with hereditary multiple exostosis was diagnosed with a pseudoaneurysm of the left popliteal artery. She previously underwent surgical excision of the exostoses located in the left distal femur and proximal tibia. Left leg pain occurred with swelling nine months after surgery, and radiographic examination revealed a popliteal artery pseudoaneurysm with an extensive destruction of the femur. In young patients, non-traumatic pseudoaneurysms of the distal femoral artery may be a complication of an exostosis, and those aneurysms may very rarely destruct the femur.