Transcriptomic analyses of IPF BALF have identified an eight−gene ferroptosis signature (NRAS, EMP1, SLC40A1, MYC, ANGPTL4, PRKCA, MUC1, GABARAPL1) that distinguishes IPF patients from healthy controls and associates with prognosis. The gene discussed is ANGPTL4; the disease is idiopathic pulmonary fibrosis.