Beyond telomere biology, a common promoter variant in the MUC5B gene (rs35705950) has been identified as a risk factor for IPF and has also been implicated in RA-ILD, hypersensitivity pneumonitis, and IPAF, but not in SSc-ILD, myositis-ILD, or sarcoidosis, illustrating genetic variability across ILD subtypes [21,22]. Here, MUC5B is linked to interstitial lung disease.