We did not find any significant differences of NE and MPO levels in serum and BAL between the male and female patients with lung cancer (NE serum 518.64 ± 10.38 ng/mL vs. 489.22 ± 15.17 ng/mL, NE BAL fluid 297.34 ± 9.88 ng/mL vs. 327.77 ± 18.79 ng/mL, MPO serum 297.56 ± 3.22 ng/mL vs. 301.54 ± 15.80 ng/mL, MPO BAL fluid 111.69 ± 13.64 ng/mL vs. 112.83 ± 10.76 ng/mL, P > 0.05). This evidence concerns the gene MPO and lung cancer.