CRTAC1 is decreased in plasma and bronchoalveolar lavage (BAL) of patients with idiopathic pulmonary fibrosis, a finding that has been attributed to loss of expression of CRTAC1 by de‐differentiated T2AE cells (Mayr et al., 2021). This evidence concerns the gene CRTAC1 and idiopathic pulmonary fibrosis.