“… 3,10,14,16,20–25 The majority of these pseudoaneurysms tend to occur in the popliteal fossa as a consequence of the inherent frequency of osteochondromas to arise at the knee, coupled with local vascular anatomical factors at this site, namely the relative immobility of the popliteal artery as it emerges from the adductor canal. 4,5,9,19,22,24–28 The presenting patient did not have a palpable popliteal pulsatile mass pre‐operatively and, indeed, no pseudoaneurysm was observed at surgery, although some degree of poststenotic dilatation of the vessel was present. Popliteal venous compression and thrombosis are also recognized complications of osteochondroma but these are less frequently encountered than are the arterial sequelae.…”