CEACAM5 and lung adenocarcinoma: CEACAM5 expression was significantly higher in primary lung adenocarcinoma (p = 1.5e−14), primary breast invasive carcinoma (p = 2.1e−11), and primary pancreatic adenocarcinoma (p = 3.0e−6) when compared to normal lung, breast, and pancreatic tissues, respectively, adjusting for age and sex.