The serum levels of apoA1 and SAP in lung cancer patients were 150.70±66.28 μg/mL and 632.00±229.42 ng/mL, respectively; for healthy subjects, the corresponding serum levels were 68.94±41.08 μg/mL and 209.39±127.87 ng/mL, respectively. The gene discussed is APCS; the disease is lung cancer.