Canine osteosarcoma associated with orthopaedic procedures

Methods and results Four cases were initially presented for evaluation of a fracture and one requiring hip arthroplasty, were subjected to the appropriate treatment that in all cases included an orthopaedic procedure, and all later developed tumours in the sites subjected to the orthopaedic procedures. All tumours were histologically confirmed to be osteosarcomas and all but the arthroplasty one arose in the diaphysis of the bone concerned. Two tumours developed adjacent to the orthopaedic plate that was left in place; one in the right femur with