Generally, measuring serum carcinoembryonic antigen (CEA), cancer antigen (CA) 15-3, CA 27-29, or a combination is not recommended because results have no effect on treatment or outcome.

• 一般不建议作血清癌胚抗原（CEA）、癌抗原（CA）15-3、CA 27-29、或上述结合测定，因为测定结果对治疗或结果并无影响。