Serum MMP7 levels were higher in IPF patients than in CTD-ILD (14.01 ng/mL, IQR (8.593-21.26 ng/mL) vs. 8.690 ng/mL, IQR (2.420-15.95 ng/mL)) and fHP (7.970 ng/mL, IQR (2.795-12.64 ng/mL); p=0.0175 and p=0.0118). The gene discussed is MMP7; the disease is idiopathic interstitial pneumonia.