title: Decreased apolipoprotein A-I level indicates poor prognosis in extranodal natural killer/T-cell lymphoma, nasal type.
abstract: BACKGROUND
  Extranodal natural killer (NK)/T-cell lymphoma, nasal type (ENKTL) is an invasive lymphoid malignancy with unfavorable survival, for which a prognostic model has not yet been validated. We hypothesized that serum apolipoprotein A-I (ApoA-I) may serve as a novel prognostic marker for ENKTL.
  
  
  METHODS
  A total of 236 newly diagnosed cases of ENKTL were analyzed retrospectively.
  
  
  RESULTS
  The optimal cutoff value for the serum ApoA-I level was determined to be 0.95 g/L. A total of 154 and 82 cases were assigned to the high and low ApoA-I groups, respectively. Patients in the low ApoA-I group tended to present with poorer clinical features, a lower complete remission rate (P=0.001), and poor median progression-free survival (P<0.001) and overall survival (P<0.001). Multivariate analysis using Cox model showed that the serum ApoA-I level was an independent prognostic marker of overall survival (P<0.001) and progression-free survival (P<0.001) for ENKTL patients. For cases in the low-risk group, as assessed by International Prognostic Index, Prognosis Index for peripheral T-cell lymphoma, unspecified, and Korean Prognostic Index, the serum ApoA-I level was able to differentiate cases with poor outcomes from cases with good outcomes.
  
  
  CONCLUSIONS
  Our results showed that the baseline serum ApoA-I level was helpful for predicting ENKTL prognosis.
authors.affiliation: State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China, Guangzhou, China; VIP Region, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University Cancer Center, Guangzhou, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Quan
authors.affiliation: State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China, Guangzhou, China; VIP Region, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University Cancer Center, Guangzhou, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China, Guangzhou, China; VIP Region, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University Cancer Center, Guangzhou, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China, Guangzhou, China; VIP Region, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University Cancer Center, Guangzhou, China.
authors.forename: Li
authors.initials: L
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China, Guangzhou, China; VIP Region, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University Cancer Center, Guangzhou, China.
authors.forename: Tingwei
authors.initials: T
authors.lastname: Li
authors.affiliation: State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China, Guangzhou, China; VIP Region, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University Cancer Center, Guangzhou, China.
authors.forename: Huijuan
authors.initials: H
authors.lastname: Qiu
authors.affiliation: State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China, Guangzhou, China; VIP Region, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University Cancer Center, Guangzhou, China; Collaborative Innovation Center of Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, China.
authors.forename: Bei
authors.initials: B
authors.lastname: Zhang
keywords: apolipoprotein A-I; extranodal NK/T-cell lymphoma; prognosis