In addition, the qRT-PCR results suggested that the expressions of MUC21, CEACAM1, FUT7, PADI1, PPL, ARHGAP40, ANKRD20A5P, C21orf15, CYP4F35P, XLOC_I2_003881, XLOC_I2_011146, and XLOC_006053 were significantly downregulated, whereas the expression of LOC100506027 was significantly upregulated in LSCC tissues compared with that in para-cancer tissues. Here, CEACAM1 is linked to cancer.