title: [Efficacy of reconstruction with modular endoprosthesis after resection of periacetabular malignant tumors].
abstract: OBJECTIVE
  To explore the efficacy of the resection of periacetabular malignant tumors and the reconstruction with modular endoprosthesis.
  
  
  METHODS
  From August 2006 to December 2012, 22 patients with periacetabular malignant tumors, who received the resection and reconstruction with modular prosthesis, were retrospectively reviewed. There were 11 males and 11 females, and the average age was 44 (16-65) years old. Pathological results showed there were 13 cases of chondrosarcoma, 5 cases of osteosarcoma, 2 cases of Ewing's sarcoma, 1 case of maligant fibrous histiocytoma, and 1 case of giant cell tumor. According to the classification system by Enneking, there were 11 cases of Type II+III resection, 5 cases of Type I+II+III resection, 3 cases of Type I+II resection, and 3 cases of Type II resection.
  
  
  RESULTS
  All patients were followed up. The average time for follow-up was 49 (11-103) months. At the last time of follow-up, 13 patients (59%) were still alive, 9 patients (41%) died due to their primary disease. Metastasis occurred in 8 patients (36%), and local recurrence occurred in 5 patients (23%). The mean Musculoskeletal Tumor Society (MSTS) score for 13 cases of alive patients at the latest time of follow-up was (18.5±5.7) months. The mean score for 11 patients, whose limb salvage were successful, was 20.7±2.0.
  
  
  CONCLUSIONS
  Reconstruction with modular prosthesis after wide resection for periacetabular malignant tumor can achieve satisfied outcome.
authors.affiliation: Department of Orthopaedics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Xiaoning
authors.initials: X
authors.lastname: Guo
authors.affiliation: Department of Orthopaedics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Tang
authors.initials: T
authors.lastname: Liu
authors.affiliation: Department of Orthopaedics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Orthopaedics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Orthopaedics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Peng
authors.affiliation: Department of Orthopaedics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Xiangsheng
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Orthopaedics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D000077:Acetabulum / Q000473:pathology* / Q000601:surgery*; D000293:Adolescent; D000328:Adult; D000368:Aged; D001859:Bone Neoplasms / Q000401:mortality / Q000601:surgery*; D002813:Chondrosarcoma / Q000401:mortality / Q000601:surgery*; D005260:Female; D005870:Giant Cell Tumors / Q000401:mortality / Q000601:surgery*; D006622:Hip Prosthesis; D051677:Histiocytoma, Malignant Fibrous / Q000401:mortality / Q000601:surgery*; D006801:Humans; D023821:Limb Salvage; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D012516:Osteosarcoma / Q000401:mortality / Q000601:surgery*; D019919:Prosthesis Implantation / Q000706:statistics & numerical data*; D012189:Retrospective Studies; D012512:Sarcoma, Ewing / Q000401:mortality / Q000601:surgery*; D016896:Treatment Outcome