Among the oncomarkers, the IPF patients had higher CEA levels than the CTD-UIP group (3.3 vs. 2.4, p < 0.001), whereas the CTD-UIP group had higher CA 19-9 and CA125 levels than the other three patients (p < 0.001). This evidence concerns the gene CEACAM5 and idiopathic pulmonary fibrosis.