Clinical Research Directory

Inclusion Criteria: * Provision of informed consent * Newly diagnosed and histological or cytological confirmed stage IIIB-IV lung adenocarcinoma or squamous cell carcinoma patients according to the AJCC staging system. The stage IV lung cancer and brain metastasis can be diagnosed by imaging and enhanced CT respectively * No EGFR mutation in tissue and ctDNA * Received immune checkpoint inhibitors as the first line therapy * ECOG performance status 0-2 with expected more than 6 months of survival time * Willingness to comply with required protocols and give permission to use the data for clinical research and products development Exclusion Criteria: * Patients have other primary cancers * Patients have symptomatic brain metastasis, complications that are associated with brain metastasis or cognitive disorders * Patients failed in either plasma or tissue sample QC