This research was a retrospective experiment. We searched the First Affiliated Hospital of Nanchang University (Nanchang, Jiangxi, China) Data Base and selected a series of consecutive patients with NSCLC confirmed by biopsy and pathology from June 2015 to June 2019. Exclusion criteria included incomplete chart information. In addition, we also analyzed cranial magnetic resonance imaging data of patients with NSCLC diagnosed with brain metastasis.
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