Herein, we analyzed transcriptomic data to identify that high CDK7 mRNA was associated with clinical outcomes in NSCLC by the GEPIA tool [26] and validated high CDK7 protein level as a prognostic factor by immunohistochemistry analysis in NSCLC patients’ tissue microarrays (TMAs) of two cohorts. The gene discussed is CDK7; the disease is non-small cell lung carcinoma.