Evidence gleaned from TCGA database further underscored this finding, demonstrating elevated CLPTM1L expression levels in lung adenocarcinoma (LUAD) tissue compared with normal tissue [CLPTM1L expression=(5.5x103) vs. (2.8x103), P<0.001], as well as in lung squamous cell carcinoma (LUSC) [CLPTM1L expression=(4.6x103) vs. (2.9x103), P<0.001] (Fig. 3A). Here, CLPTM1L is linked to squamous cell lung carcinoma.