Serum CA199,CA242 and CA724 are good markers in diagnosing digestive tract neoplasms,and may be chosen in diagnosing different tumor.

• 血清CA199、CA242、CA724是消化系恶性肿瘤良好的诊断指标,有一定的临床应用价值,可针对不同的肿瘤类型进行选择应用。