6Eisenherg B, Decosse J J, Harford F, et al. Carcinoma of the colon and rectum: The natural history reviewed in 1704 patients[J]. Cancer,1982,49(6) :1131-1134.
7Wolmark N. The prognostic significance of preopera tive carcinoembryonic antigen levels in colorectal cancer [M].Ann Surg. 1984,199:375.
8Iassacson P. The demonstration of carcinoembryonic antigen in colorectal carcinoma and colonic polyps using immunoperoxidase technique [M]. Cancer, 1976, 38:1348.
9Cusack JC,Giacco GG,Cleary K,et al. Survival factors in 186 patients younger than 40 years old with coloretal adenocarcinoma [J]. Am Coll Surg, 1996, 183 (2): 105.