title: Reconstruction of the knee extensor mechanism in patients with a malignant bone tumor of the proximal tibia.
abstract: OBJECTIVE
  Reconstruction of the knee extensor mechanism after the excision of a malignant bone tumor is often difficult, particularly if the tumor is located in the proximal tibia. We developed a novel method to reconstruct the knee extensor mechanism using autologous fasciae, and subsequently evaluated the efficacy of this method.
  
  
  METHODS
  We examined the studied reconstruction method, range of motion, extension lag, knee extensor strength, and functional evaluation of three patients with a malignant bone tumor in the proximal tibia. All three patients underwent reconstruction of the knee extensor mechanism by our method.
  
  
  RESULTS
  All patients experienced satisfactory outcomes with regard to the above-mentioned parameters. The functional evaluation scores in the three patients were 90%, 95%, and 95% (mean, 90%).
  
  
  CONCLUSIONS
  In this analysis of our recently devised reconstruction method, the follow-up duration was short and only three patients were investigated. However, if appropriate patients are carefully selected for this procedure, long-term outcomes associated with new technique may be better than those associated with other methods of the knee extensor reconstruction.
authors.affiliation: Department of Orthopedic Surgery, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan.
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Yoshida
authors.forename: Shunzo
authors.initials: S
authors.lastname: Osaka
authors.forename: Junnosuke
authors.initials: J
authors.lastname: Ryu
mesh_terms: D000293:Adolescent; D001859:Bone Neoplasms / Q000601:surgery*; D005205:Fascia / Q000637:transplantation*; D005260:Female; D006801:Humans; D007717:Knee / Q000601:surgery*; D019637:Orthopedic Procedures; D012516:Osteosarcoma / Q000601:surgery*; D019651:Plastic Surgery Procedures; D020127:Recovery of Function; D013977:Tibia; D014182:Transplantation, Autologous