title: [Meta-analysis of risk factors of recurrence in patients with giant cell tumor on extremities].
abstract: OBJECTIVE
  To explore the risk factors of giant cell tumor on extremities for patients with postoperative recurrence.
  
  
  METHODS
  The literature reports published before June 2014 were searched in the electronic databases of CBM, CNKI, PUBNED, MEDLINE and EMBASE. Meta-analysis was performed by software Review Manager (Version 5.3). The odds ratios (OR) of gender, age, tumor site, Campanacci Classification, pathological fracture, selection of treatment and soft tissue invasion were analyzed with heterogeneity test. Publication bias were tested by funnel plot and fail-safe number.Sensitivity analysis was performed to assess the stability.
  
  
  RESULTS
  A total of 15 case-control studies were identified. Age, location and type of surgery were associated with tumor recurrence. The combined OR (95%CI) was 1.83 (1.04-3.24) P = 0.04 for aged <20 years, 0.52(0.31-0.86) P = 0.01 for aged >40 years, 1.60 (1.06-2.42) P = 0.02 for distal radius, 0.35 (0.14-0.90) P = 0.03 for proximal humerus, 3.64 (1.88-7.04) P = 0.0001 for curettage,0.56 (0.35-0.91) P = 0.02 for curettage with PMMA, 1.79 (1.11-2.88) P = 0.02 for curettage with bone graft and adjuvant and 0.29 (0.12-0.66) P = 0.003 for resection respectively. There were not significant relationship between tumor recurrence and gender, tumor location (distal femur, proximal femur, distal tibia, proximal tibia), Jaffe staging, Campanacci classification,Enneking classification, pathological fracture, soft tissue invasion, extensive curettage, curettage with bone graft, curettage with polymethylmethacrylate and adjuvant (P > 0.05).
  
  
  CONCLUSIONS
  Youth (aged <20 years), distal radius, curettage and curettage with bone graft and adjuvant are the risk factors for recurrence of giant cell tumor.However, advanced age (aged >40 years), proximal tibia, curettage with PMMA and resection appear to have lower risks for tumor recurrence.
authors.affiliation: Department of Orthopedics, First Hospital, Jiamusi University, Heilongjiang 154002, China.
authors.forename: Rongrui
authors.initials: R
authors.lastname: Li
authors.affiliation: Department of Bone Tumor, Tianjin Hospital, Tianjin 300210, China. Email: yongchenghu@126.com.
authors.forename: Yongcheng
authors.initials: Y
authors.lastname: Hu
mesh_terms: D000293:Adolescent; D001859:Bone Neoplasms; D016025:Bone Transplantation; D003475:Curettage; D005121:Extremities; D005269:Femur; D005500:Follow-Up Studies; D018212:Giant Cell Tumor of Bone; D005870:Giant Cell Tumors; D006801:Humans; D006811:Humerus; D019904:Polymethyl Methacrylate; D011884:Radius; D012008:Recurrence; D012307:Risk Factors; D013977:Tibia; D055815:Young Adult
chemical_list: D019904:Polymethyl Methacrylate