title: [Clinical study of S-1 for advanced gastric cancer after reduction surgery].
abstract: We investigated the clinical efficacy and safety of S-1 retrospectively for the treatment of 32 patients with advanced gastric cancer after reduction surgery (gastrectomy). S-1 was administered orally twice daily, at a standard dose of 80 mg/m(2) per day for 28 days, followed by a 14-day rest. There were 21 patients having only a single residual metastatic site and 11 with two or more metastatic sites. Major residual metastatic sites were peritoneum in 25 patients, lymph nodes in 7, liver in 4 and lung in 2. The response rate by target organ was 28.6% for lymph node metastasis, and 0% for liver and lung metastasis. Peritoneal metastasis was not considered measurable site. The median survival time (MST) after S-1 administration was 573 days (95% confidence interval, 439 to 707 days). The 1-, 2- and 3-year survival rates were 62.3%, 40.3% and 28.2%, respectively. Of the 32 patients, 14 received S-1 for more than a year, and the MST in these patients was 897 days (95% confidence interval, 255 to 1,539 days). The incidence of adverse events was 90.6%, but the incidence of grade 3 or 4 was 12.5%. Long-term administration of S-1 may serve to prolong the survival period of patients with gastric cancer after reduction surgery, particularly in peritoneal metastasis.
authors.affiliation: Dept. of Surgery, Yamagata Prefectural Kahoku Hospital.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Inaba
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Hayashi
authors.forename: Takuya
authors.initials: T
authors.lastname: Miura
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Moriya
authors.forename: Makoto
authors.initials: M
authors.lastname: Takiguchi
authors.forename: Hideki
authors.initials: H
authors.lastname: Isobe
authors.forename: Shuichi
authors.initials: S
authors.lastname: Watabe
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy* / Q000401:mortality / Q000556:secondary / Q000601:surgery; D000368:Aged; D000964:Antimetabolites, Antineoplastic / Q000627:therapeutic use*; D017024:Chemotherapy, Adjuvant; D004334:Drug Administration Schedule; D004338:Drug Combinations; D005260:Female; D005743:Gastrectomy; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D010094:Oxonic Acid / Q000627:therapeutic use*; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000188:drug therapy* / Q000401:mortality / Q000473:pathology / Q000601:surgery; D015996:Survival Rate; D005641:Tegafur / Q000627:therapeutic use*
chemical_list: D000964:Antimetabolites, Antineoplastic; D004338:Drug Combinations; C079198:S 1 (combination); D005641:Tegafur; D010094:Oxonic Acid