Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

1. Male and Female age 18 or more
2. Pathologically proven non-small cell lung cancer
3. MRI(Magnetic Resonance Imaging,MRI) imaging findings or the detection of malignant cells in cerebrospinal fluid
4. Patients have the ability to understand and the willingness to sign a written informed consent document.

Efficacy and Safety of Durvalumab in Non-Small Cell Lung Cancer With Leptomeningeal Metastasis