The epidermal growth factor receptors (EGFRs) have inhibitory effects on cell apoptosis, cell growth, angiogenesis and metastasis of tumor cell. The advent of EGFR-TKI significantly improved the clinical efficacy and safety of non-small cell lung cancer (NSCLC) treatment. Compelling study also demonstrate Gefitinib may be effective in the treatment of bone metastases. For NSCLC patients who were effective in EGFR-TKI treatment, whether bone metastasis would shorten the survival time of the patients or reduce the quality of life of patients is worth studying. The researches aim to analysis whether bone metastasis could affect the survival of NSCLC patients who were effective in Gefitinib treatment over 6 months.
Gefitinib is a selective small molecule epidermal growth factor receptors (EGFR) tyrosine kinase inhibitors (EGFR-TKI), it's curative effect on non-small cell lung cancer (NSCLC) has been confirmed by a number of prospective clinical trials. The researches aim to analysis whether bone metastasis could affect the survival of NSCLC patients who were effective in Gefitinib treatment over 6 months.