Evaluation of MMPs concentration of serum samples between lung cancer patients and healthy population indicated that the high expression of MMP‐1, MMP‐7 and MMP‐9 is noticed in lung cancer patients and MMP‐9 expression can discriminate early stage of lung cancer from healthy individuals (Blanco‐Prieto et al., 2017). The gene discussed is MMP1; the disease is lung carcinoma.