title: Retrospective study of S-1 versus tegafur/uracil and oral leucovorin in patients with metastatic colorectal cancer.
abstract: THE AIM of this study was to compare the efficacy and toxicity of S-1 to an oral combination regimen of tegafur and uracil (UFT) with leucovorin (LV) in metastatic colorectal carcinoma (CRC) patients.
  
  
  METHODS
  Fifty-two patients were treated with either S-1 (80 mg/m2/d), administered for 28 days every 42 days, or UFT (300 mg/m2/d) and LV (90 mg/d), administered for 28 days every 35 days. The clinical results were compared retrospectively.
  
  
  RESULTS
  There were no statistically significant differences in overall response between the two patient groups. The overall response rate was 11.8% in the S-1 group, and 11.1% in the UFT/LV group. No statistically significant difference in-time- to progression (TTP) or survival time was observed between the treatments. The median survival time was 29 months with S-1 and 12 months with UFT/LV.
  
  
  CONCLUSIONS
  The oral S-1 provided similar safety and efficacy, compared to UFT/LV for metastatic CRC.
authors.affiliation: Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan. kotaros@surg2.med.kyushu-u.ac.jp
authors.forename: Kotaro
authors.initials: K
authors.lastname: Shibahara
authors.forename: Manabu
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kakeji
authors.forename: Hisanobu
authors.initials: H
authors.lastname: Sakata
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Maehara
mesh_terms: D000284:Administration, Oral; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D015179:Colorectal Neoplasms / Q000188:drug therapy* / Q000473:pathology; D004338:Drug Combinations; D005260:Female; D006801:Humans; D002955:Leucovorin / Q000008:administration & dosage / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D010094:Oxonic Acid / Q000008:administration & dosage / Q000009:adverse effects; D010349:Patient Compliance; D012189:Retrospective Studies; D005641:Tegafur / Q000008:administration & dosage / Q000009:adverse effects; D014498:Uracil / Q000008:administration & dosage / Q000009:adverse effects
chemical_list: D004338:Drug Combinations; C079198:S 1 (combination); D005641:Tegafur; D014498:Uracil; D010094:Oxonic Acid; D002955:Leucovorin