title: [Use of a prosthesis after resection of a giant cell tumor of the knee].
abstract: OBJECTIVE
  Show the efficacy of a tumor prosthesis after the resection of a giant cell knee tumor in the proximal tibia and the recovery of knee function.
  
  
  METHODS
  This is a report of a retrospective observational clinical case of a male, 36-year-old patient with history of left knee arthrodesis in 1996 following the resection of a giant cell tumor in the distal femur. The latter relapsed in 2004 and a solitary pulmonary tumor node was detected. Broad resection of the femur and the arthrodesed tibia was performed together with the placement of a tumor prosthesis.
  
  
  RESULTS
  At the 20th postoperative month the patient had remission of the pulmonary node, knee function with passive flexion of 120 degrees and total extension, gait without limitations, no pain, a Musculoskeletal Tumor Society functional knee score of 28 and a Knee Society score of 95.
  
  
  CONCLUSIONS
  The resection of the arthrodesis zone and the giant cell tumor achieved the double goal of erradicating the tumor and recovering the knee mobility after 10 years of arthrodesis, which led to a very satisfied patient capable of resuming his activities.
authors.affiliation: Servicio de Ortopedia y Traumatología y Reemplazos Articulares, Hospital Angeles Querétaro. ramirovargasv@yahoo.com.mx
authors.forename: Ramiro
authors.initials: R
authors.lastname: Vargas Vázquez
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000601:surgery*; D018212:Giant Cell Tumor of Bone / Q000601:surgery*; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D012189:Retrospective Studies; D013977:Tibia