Advanced Metastatic Non-small Cell Lung Cancer Patients Aged or PS Score 2 Points for First Line Application Pemetrexed/Carboplatin Chemotherapy Regimens Sequential Pemetrexed Single Drug Maintenance Treatment of Clinical Research and Related Predictive Biomarkers of Exploratory Research
Inclusion Criteria:
.≥70 years or PS 2
- Patients who were diagnosed by the histologic, cytologic diagnosis of IV non-small
cell lung cancer
- Patients received no chemical therapy or only received targeted therapy,and there is
evidence show the patent is PD
- Presence of at least one index lesion measurable by CT scan or MRI
- leucocyte ≥ 3.5×109/L
- neutrophil ≥ 1.5×109/L
- platelet ≥ 80×109/L
- Hemoglobin ≥ 9g/L
- ALT and AST ≤ 2.5×ULN ,Tbil≤ 1.5×ULN
- BUN≤ 1.5×ULN
- Signed written informed consent
Exclusion Criteria:
- squamous carcinoma or small cell lung cancer
- Patients were allergic to pemetrexed
- Patients received chemotherapy before
- Uncontrolled acute infection
.Uncontrolled pleural effusion
- Severe symptomatic heart disease
- Severe infection or metabolic disfunction
- Patients with other malignant tumor
- Uncontrolled brain metastases
- Patients have accepted other clinical trials
- Female patients during their pregnant and lactation period, or patients without
contraception
- Mental disorientation of disorder
- Glucocorticoids taboo