The present study was undertaken to evaluate the expression of CT antigens (NY-SAR-35, SCP-1, SSX-1, SSX-2, SSX-4, MAGE-1, MAGE-3, MAGE-4, MAGE-10, CT-7, NY-TLU57, NY-ESO-1, and LAGE-1) in lung cancer tissues. This evidence concerns the gene CTAG2 and lung cancer.