Intraoperative photos. A) Auxiliary template for tumor resection was installed. B) Resected specimen. C) Allogenic bone with template for trimming. D) Trimmed allogeneic bone. E) The trimmed allogeneic bone with prosthesis installed. F) Distal femur implant in place. G) Template for drilling holes in the allogenic bone. H) Allogeneic bone was used to cover the junction zone and fixed with a double wire band.