There were no significant differences in body height, smoking history, glomerular filtration rate, serum albumin level, serum levels of liver enzymes, tuberculosis history, family history, performance status, TTF-1 staining, PDL-1 staining, and the EGFR gene mutation site (exon 19 or 21) of the cancer specimens between the two groups. Here, TTF1 is linked to tuberculosis.