The patient was taken to the operating room and, intraoperatively, a large false aneurysm weighing two liters with a lot of clots, and two holes in the artery, were found. One of the rare complications is pseudoaneurysm formation of popliteal artery. The distal femur and proximal tibia are the most common sites for osteochondromas. The pain symptoms should alert the surgeon to the possibility of a vascular complication. 1 Arteriography, ultrasonography and MRI are helpful in confirming the diagnosis.
Operation is recommended because of the risk of distal embolization.
The osteochondroma should then be excised. Vascular complications of osteochondroma. Hasselgren P, Eriksson B, Lukes P, et al. False popliteal aneurysm caused by exostosis of the femur. Liebermann J, Mazzucco J, Kwasnik E, Knight D. Popliteal pseudoaneurysms as a complication of an adjacent osteochondroma.