Next-generation Sequencing of Small Cell Lung Cancer to Identify Susceptibility Gene and to Assess Treatment

Participants will be consented into the study after they are found to meet the study inclusion criteria. The clinical staff will schedule a tissue biopsy and a blood draw for the participant to give NGS(Next-generation Sequencing).One is according to the germline mutation data to screen susceptible gene in SCLC(Small Cell Lung Cancer); two is to explore the extensive consistency detection of blood and tissues in patients with SCLC gene mutation information; three is to conduct dynamic monitoring of blood ctDNA(circulating tumor DNA) in patients with SCLC during treatment, by changing the types of mutations / abundance (for example: the clonal evolution of typical samples analysis) and change of tumor load, , investigating the patients treatment effect , for the significant change of mutations, to study whether it can be used as molecular marker; four is to analyze of the molecular typing of SCLC, according to the clinical and pathological features of patients.