A Study of SBRT in Combination With rhGM-CSF for Stage IV NSCLC Patients Who Failed in Second-line Chemotherapy

Metastasis lesion will be treated with a SBRT of 50Gy/5F from day 1 to day 5 in one cycle.Subcutaneous injection of human recombined granulocyte-macrophage colony stimulating factor (125ug/m² per day) will be executed from day 1 to day 14 in this cycle. Another metastasis lesion will be treated likewise concurrently with rhGM-CSF in a consecutive cycle. Efficacy evaluation,especially abscopal effect evaluation, will be conducted at the end of therapy and every month after that. Adverse events will be recorded according to NCI-CTC version 4.03.