title: [Clinical value of the sixth edition TNM stages analysing prognosis of colorectal cancer].
abstract: OBJECTIVE
  To study the clinical value analyzing of colorectal cancer prognosis by the Sixth Edition TNM Stages.
  
  
  METHODS
  5481 cases with colorectal cancer and treated by operational methods, were collected. All the cases were separately staged by the Fifth Edition or Sixth Edition TNM Stages standards. The 5-year survival rates were analyzed by the life table method.
  
  
  RESULTS
  The 5-year survival rates of the Fifth Edition TNM Stages of I, II, III and IV were 80.1%, 68.0%, 40.5% and 9.8% respectively. The 5-year survival rates of the Sixth Edition TNM Stages of II(A) and II(B) were 71.6% and 66.4% respectively, and of the stages III(A), III(B) and III(C) were 46.2%, 40.1% and 28.3% respectively. There were statistical differences among the sub-stages II and III, P < 0.05.
  
  
  CONCLUSIONS
  The Sixth edition TNM Stages laid more stress on effect of the local infiltration depths and lymphatic metastasis in the prognosis of colorectal cancer, therefore, the stages were more fine, to analyze prognosis of the colorectal cancer were more precise. It is high clinical value for the individual complex treatment with every sub-stages.
authors: Colorectal Surgery, Institute of Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China. hanhongqiu@eyou.com
authors: Hong-qiu
authors: HQ
authors: Han
authors: Tong
authors: T
authors: Liu
authors: Li-zhong
authors: LZ
authors: Zhao
authors: Feng
authors: F
authors: Qi
authors: Peng-zhi
authors: PZ
authors: Wang