MMP9 and non-small cell lung carcinoma: The NSCLC group had a significantly higher serum level of MMP-9 (194.05 ± 17.56 vs. 45.21 ± 14.52 ng/mL, p = 0.00) and MMP-13 (288.16 ± 8.97 vs. 57.56 ± 7.95 ng/mL; p < 0.001) compared to healthy subjects.