Human colon cancer cell line LS174T, patient colon cancer lung metastases (lung 3, lung 4), regional and liver metastases (CM1, CM2, CM3, CM6, CM7, liver 2, liver 6, liver 5), peritoneal metastases (PM9, PM12) and primary colon cancer (C4 and C14) all demonstrated varying levels of CEACAM5. Here, CEACAM5 is linked to colonic neoplasm.