title: [Three cases of metastatic breast cancer effectively treated with S-1 therapy].
abstract: We experienced 3 cases of recurrent breast cancer treated with S-1 therapy, delaying tumor progression and improving their quality of life (QOL). All the patients had been previously treated with both anthracyclines and/or taxanes prior to S-1 chemotherapy. All patients almost completed the full dose through the whole course of treatment, and the drug showed good tolerability. Long-term(more than 12 weeks)therapeutic efficacy and the patients' QOL have been maintained for all patients. No major side effects were seen. It is thought that less toxicity enabled patient 3 to undergo long-term therapy. It is especially important that one patient had therapeutic efficacy and QOL improvement from treatment with S-1 and aromatase inhibitor for over 3 years, after being treated with anthracyclines, taxanes and vinorelbine. We conclude that S-1 is effective and well tolerated in patients with metastatic breast cancer, and will accommodate a long-time progression with respect to efficacy and maintaining the patients' QOL. Further evaluation of S-1 is necessary to elucidate its clinical role in breast cancer treatment.
authors.affiliation: Dept. of Surgical Oncology, The University of Tokyo.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kato
authors.forename: Joji
authors.initials: J
authors.lastname: Kitayama
authors.forename: Hironori
authors.initials: H
authors.lastname: Yamaguchi
authors.forename: Junichi
authors.initials: J
authors.lastname: Sanuki
authors.forename: Shoichi
authors.initials: S
authors.lastname: Kaisaki
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Nagawa
mesh_terms: D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D014408:Biomarkers, Tumor / Q000097:blood; D001943:Breast Neoplasms / Q000097:blood / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000473:pathology; D004338:Drug Combinations; D005260:Female; D006801:Humans; D008875:Middle Aged; D009362:Neoplasm Metastasis / Q000000981:diagnostic imaging / Q000188:drug therapy; D010094:Oxonic Acid / Q000627:therapeutic use*; D005641:Tegafur / Q000627:therapeutic use*; D014057:Tomography, X-Ray Computed
chemical_list: D014408:Biomarkers, Tumor; D004338:Drug Combinations; C079198:S 1 (combination); D005641:Tegafur; D010094:Oxonic Acid