LINC00665 and squamous cell lung carcinoma: Analysis of The Cancer Genome Atlas (TCGA) database (https://ualcan.path.uab.edu/analysis.html) revealed a significant upregulation of LINC00665 in both lung adenocarcinoma (LUAD) and lung squamous cell carcinoma (LUSC) (both P < 0.05, Fig. 1A).