title: [Analysis of prognostic factors in NSCLC patients with brain metastases  diagnosed by constrast-enhanced MRI after whole brain radiotherapy].
abstract: OBJECTIVE
  Brain metastases are a common complication of lung cancer, occurring in 20%-40% of patients. The aim of this study is to explore prognostic factors in non-small cell lung cancer (NSCLC) in patients with brain metastases diagnosed by constrast-enhanced MRI after whole brain radiotherapy.
  
  
  METHODS
  TA retrospective review of clinical data from 241 NSCLC patients with brain metastases received whole brain radiotherapy from April 2007 to October 2008 was performed. A number of potential factors that might affect prognosis after irradiation were evaluated. The significance of prognostic variables in the survival resulted from univariate analysis by Kaplan-Meier combining with Log-rank test, and the multivariate analysis was obtained by Cox regression model.
  
  
  RESULTS
  Median follow-up time for the survivors was 19.1 months. For all patients, the median survival time (MST) was 8.7 months. By univariate analysis, female patients with KPS>70, no symptom when diagnosed with brain metastases, tumor controlled in the chest, and received more than 3 cycles of chemotherapy and combined target therapy were the important factors for overall survival. By multivariate analysis, female, tumors controlled in the chest, and combined target therapy were independent prognostic factors for NSCLC patients with brain metastases. Tumor controlled in the chest was the most important independent prognostic factor.
  
  
  CONCLUSIONS
  Gender, local tumor controlled, and combined target therapy significantly influenced NSCLC brain metastases diagnosed by constrast-enchanced MRI survival after whole brain radiotherapy.eciated patient subsets and is a useful method for dissecting complex clinical situations. Moreover, CART can be used to identify homogeneous patient populations in clinical practice and future clinical trials.
authors.affiliation: Department of Radiation Oncology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China. liuhui1127@yahoo.com.cn
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.forename: Qiongya
authors.initials: Q
authors.lastname: Wu
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Gong
authors.forename: Xiaodong
authors.initials: X
authors.lastname: He
authors.forename: Hongyu
authors.initials: H
authors.lastname: Wu
authors.forename: Zhaoying
authors.initials: Z
authors.lastname: Sheng
authors.forename: Dao'an
authors.initials: D
authors.lastname: Zhou
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001921:Brain / Q000528:radiation effects*; D001932:Brain Neoplasms / Q000175:diagnosis* / Q000532:radiotherapy* / Q000556:secondary; D002289:Carcinoma, Non-Small-Cell Lung / Q000473:pathology*; D003287:Contrast Media; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011379:Prognosis; D012189:Retrospective Studies; D016019:Survival Analysis
chemical_list: D003287:Contrast Media