title: Effect of gefitinib re-challenge to initial gefitinib responder with non-small cell lung cancer followed by chemotherapy.
abstract: OBJECTIVE
  We investigated the efficacy of gefitinib re-challenge for the patients who responded to initial treatment with gefitinib and acquired resistance to gefitinib thereafter.
  
  
  METHODS
  Medical records were retrospectively reviewed in the hospitals of National Hospital Organization from August 2002 to August 2008. Patients histologically or cytologically confirmed NSCLC were eligible if they once responded to initial treatment with gefitinib (CR, PR or SD) and then re-treated with gefitinib following subsequent chemotherapy.
  
  
  RESULTS
  Twenty patients (16 PR, 4 SD) were enrolled in this study. After re-treatment with gefitinib, 5 cases showed PR and 8 cases SD. Overall response rate was 25% (5/20) and disease control rate was 65% (13/20) in the gefitinib re-treated patients. Median survival time from the start of the initial gefitinib and from the start of the re-administration of gefitinib were 34.0 and 10.0 months, respectively.
  
  
  CONCLUSIONS
  Re-administration of gefitinib was effective and therefore should be considered as one of the treatment option for the patients with NCLCL who once responded and acquired resistant to gefitinib following subsequent chemotherapy.
authors: Nishigunma Hospital, 2854 Kanai, Shibukawa, Gunma 377-8511, Japan. ytomizawa@netnngh.hosp.go.jp
authors: Yoshio
authors: Y
authors: Tomizawa
authors: Yuka
authors: Y
authors: Fujita
authors: Atsuhisa
authors: A
authors: Tamura
authors: Masahiro
authors: M
authors: Shirai
authors: Satoshi
authors: S
authors: Shibata
authors: Tsutomu
authors: T
authors: Kawabata
authors: Takuo
authors: T
authors: Shibayama
authors: Shimao
authors: S
authors: Fukai
authors: Masaaki
authors: M
authors: Kawahra
authors: Ryusei
authors: R
authors: Saito
mesh_terms: D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000009:adverse effects; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy* / Q000401:mortality / Q000473:pathology / Q000503:physiopathology; D019008:Drug Resistance, Neoplasm; D005260:Female; D000077156:Gefitinib; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000401:mortality / Q000473:pathology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011799:Quinazolines / Q000008:administration & dosage* / Q000009:adverse effects; D012189:Retrospective Studies; D012907:Smoking; D016019:Survival Analysis
chemical_list: D000970:Antineoplastic Agents; D011799:Quinazolines; D000077156:Gefitinib