TP53 and lung cancer: The median serum anti-p53 Ab level in lung cancer group, NAPN group and healthy volunteer group was 12.90 ng/mL (range: 2.67-104.19 ng/mL), 17.63 ng/mL (2.52-92.19 ng/mL) and 4.02 ng/mL (2.23-25.72 ng/mL), respectively.