For patients of advanced NSCLC (non small cell lung cancer) , Individualized cancer therapy has been widely accepted since the success of crizotinib administration based on EML4-ALK fusion gene detection and gefitinib and erlotinib administration based on EGFR-TKIs sensitive mutations.From clinical points of view ,individual differences often occur between different patients, leading diverse effect in ADR and drug effect.Meanwhile ,the drug effect and adverse drug reaction was significantly influenced by the pharmacokinetic factors and pharmacodynamic factors.In this research ,we try to establish a more sensitive method to detect sensitive mutations in plasma and discover the correlation between somatic and germline mutations , trough concentration and EGFR-TKI drug effect, the association between ADME-associated SNP ,trough concentration and EGFR-TKI adverse effect .Furthermore, in vivo and in vitro research is also crucial for rational explanation for these clinical phenomenon.

The ADME-associated SNPs included are CYP3A4,CYP3A4,CYP1A1,CYP2D6, ABCB1,ABCG2 and so on .The somatic mutations included are EGFR ,K-RAS ,ALK and so on

Inclusion Criteria:

The main patient entry criteria included: age≥ 18 years ; histologically and cytologically proved NSCLC; Eastern cooperative oncology group performance status (ECOG PS)≤2; adequate hematological , renal, and hepatic functions. Exclusion Criteria:

uncontrolled systemic disease ,any evidence of clinically active interstitial lung diseases, and other chemotherapy at the time of inclusion. The protocol was approved by the Ethical Committee of Cancer Center of Sun Yat-Sen University (CCSU), and written informed consent was obtained form each patient.

locally advanced or metastatic NSCLC (non-small cell lung cancer) patients; administrated with gefitinib,erlotinib .