title: [Comparative study of recurrent colon cancer and recurrent rectal cancer after radical resection].
abstract: OBJECTIVE
  To explore the difference in tumor biological behaviors and prognosis between recurrent colon cancer and recurrent rectal cancer after radical operation.
  
  
  METHODS
  Complete clinical and follow-up data of 132 patients with colorectal cancer developed recurrence,including 36 colon cancers and 96 rectal cancers, after curative resection were retrospectively analyzed and compared with respect of clinical pathological features and prognosis between colon and rectal cancer.
  
  
  RESULTS
  Significant differences were found in primary tumor gross type, histological type, tumor differentiation and lymph node metastasis between colon and rectal cancer(P<0.05). Colon cancer recurred earlier than rectal cancer after radical surgery with the median time to recurrence being 14.0 months and 21.5 months, respectively(P=0.028). The difference in multiple sites recurrence was also found between colon(n=16, 44.4%) and rectal cancer(n=65, 67.7%)(P=0.014). The 3-year survival rate of recurrent rectal cancer was better than that of colon cancer (24.8% vs 15.6%, P=0.026).
  
  
  CONCLUSIONS
  There are some differences in tumor biological behaviors between colon and rectal cancer, and the prognosis of rectal cancer with recurrence is better than that of colon cancer.
authors.affiliation: Institute of Anal-colorectal Surgery, Central Hospital of PLA, Henan Luoyang 471031, China. xinhua_sheng@163.com
authors.forename: Xin-hua
authors.initials: XH
authors.lastname: Sheng
authors.forename: Chun-fang
authors.initials: CF
authors.lastname: Gao
authors.forename: Xi-qing
authors.initials: XQ
authors.lastname: Ji
authors.forename: Dong
authors.initials: D
authors.lastname: Wei
authors.forename: Guo-bao
authors.initials: GB
authors.lastname: Zheng
mesh_terms: D000328:Adult; D003110:Colonic Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000473:pathology*; D009367:Neoplasm Staging; D011379:Prognosis; D012004:Rectal Neoplasms / Q000473:pathology* / Q000601:surgery; D012189:Retrospective Studies; D015996:Survival Rate