title: The necessity of chemotherapy in T3N0M0 colon cancer without risk factors.
abstract: BACKGROUND
  For patients with T3N0M0 colon cancer without known risk factors, the necessity of chemotherapy has no definite consensus.
  
  
  METHODS
  From 1994 to 2004, we retrospectively analyzed 247 patients who had pathologically confirmed T3N0M0 colon cancer without risk factors.
  
  
  RESULTS
  Among the 247 patients, 198 (80.2%) received chemotherapy and 49 (19.8%) underwent surgery alone. The 5-year survival rate was 92.8% for patients with T3N0M0 colon cancer without risk factors. Only chemotherapy increased survival (P = .032) by multivariate analysis. The 5-year survival rates were 85.4% in the surgery-only group and 94.2% in the group that received surgery with chemotherapy. There was no difference in the therapeutic efficacy of 5-fluorouracil, capecitabine, and uracil/tegafur (P = .424) for survival.
  
  
  CONCLUSIONS
  The results of this study showed that chemotherapy improved the survival of patients with T3N0M0 colon cancer without risk factors.
authors.affiliation: Department of Surgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Gangnam-Gu, Seoul, Korea.
authors.forename: Hae Ran
authors.initials: HR
authors.lastname: Yun
authors.forename: Hee Cheol
authors.initials: HC
authors.lastname: Kim
authors.forename: Woo Yong
authors.initials: WY
authors.lastname: Lee
authors.forename: Yong Beom
authors.initials: YB
authors.lastname: Cho
authors.forename: Seong Hyeon
authors.initials: SH
authors.lastname: Yun
authors.forename: Ho-Kyung
authors.initials: HK
authors.lastname: Chun
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D000069287:Capecitabine; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery*; D003131:Combined Modality Therapy; D003841:Deoxycytidine / Q000008:administration & dosage / Q000031:analogs & derivatives; D005260:Female; D005472:Fluorouracil / Q000008:administration & dosage / Q000031:analogs & derivatives; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D012307:Risk Factors; D015996:Survival Rate; D005641:Tegafur / Q000008:administration & dosage; D016896:Treatment Outcome; D014498:Uracil / Q000008:administration & dosage
chemical_list: D003841:Deoxycytidine; D005641:Tegafur; D014498:Uracil; D000069287:Capecitabine; D005472:Fluorouracil