title: Prognostic role of the number of involved extraspinal organs in patients with metastatic spinal cord compression.
abstract: OBJECTIVE
  This study was investigated the prognostic role of the number of involved extraspinal organs in the survival of patients with metastatic spinal cord compression (MSCC).
  
  
  METHODS
  Data of 552 patients treated with 30Gy in 10 fractions of radiotherapy (RT) alone for MSCC were retrospectively analyzed. In addition to the number of involved extraspinal organs, eight potential prognostic factors were investigated including age, gender, Eastern Cooperative Oncology Group performance score (ECOG-PS), primary tumor type, number of involved vertebrae, interval from cancer diagnosis to RT, pre-RT ambulatory status, and time developing motor deficits.
  
  
  RESULTS
  The 6-month survival rates for the involvement of 0, 1, 2, 3, and ≥4 extraspinal organs were 88%, 55%, 30%, 13%, and 12%, respectively (P<0.001). In the multivariate analysis, number of involved extraspinal organs maintained significance (risk ratio 1.61; 95%-confidence interval 1.47-1.77; P<0.001). On multivariate analysis, gender (P=0.017), ECOG-PS (P<0.001), primary tumor type (P<0.001), interval from cancer diagnosis to RT (P<0.001), pre-RT ambulatory status (P<0.001), and time developing motor deficits (P<0.001) were also independent predictors for survival.
  
  
  CONCLUSIONS
  The number of involved extraspinal organs is a new and independent prognostic factor in patients with MSCC and should be considered in future clinical trials.
authors: Department of Radiation Oncology, University of Lübeck, Lübeck, Germany. Electronic address: Rades.Dirk@gmx.net.
authors: Dirk
authors: D
authors: Rades
authors: Department of Radiation Oncology, University of Lübeck, Lübeck, Germany; Department of Medical Oncology and Hematology, University of Lübeck, Lübeck, Germany.
authors: Axel
authors: A
authors: Weber
authors: Department of Radiation Oncology, Hannover Medical University, Hannover, Germany.
authors: Johann H
authors: JH
authors: Karstens
authors: Department of Radiation Oncology, Mayo Clinic, Scottsdale, USA.
authors: Steven E
authors: SE
authors: Schild
authors: Department of Medical Oncology and Hematology, University of Lübeck, Lübeck, Germany.
authors: Tobias
authors: T
authors: Bartscht
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009362:Neoplasm Metastasis / Q000473:pathology* / Q000532:radiotherapy; D011379:Prognosis; D012189:Retrospective Studies; D012737:Sex Factors; D013117:Spinal Cord Compression / Q000209:etiology*; D013125:Spinal Neoplasms / Q000473:pathology; D016019:Survival Analysis
keywords: Involved extraspinal organs; Metastatic spinal cord compression; Prognostic value; Radiotherapy; Survival