Recent work shows similar clinical, radiographic and genetic features (MUC5B rs35705950, mutations in genes involved in telomere maintenance) between certain patterns of RA-ILD, in particular UIP, and idiopathic pulmonary fibrosis (IPF), which could indicate shared pathways of pathogenesis and mechanisms of fibrosis (81). The gene discussed is MUC5B; the disease is idiopathic pulmonary fibrosis.