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已经证实，癌胚抗原（CEA）在消化道恶性肿瘤患者中阳性率较高，带对肿瘤分期，疗效评价和预后判断等有较大价值[1]。唾液酸（SA）是近年来颇受重视的肿瘤标志物之一，在消化道肿瘤的诊断和治疗中的价值被认为与CEA相似。两者联合检测可提高消化道肿瘤诊断的准确性，更好的指导
It has been confirmed that the positive rate of carcinoembryonic antigen (CEA) in patients with digestive tract malignant tumors is high, and it has great value in tumor staging, curative effect evaluation and prognosis judgment [1]. Sialic acid (SA) is one of the most important tumor markers in recent years. Its value in the diagnosis and treatment of digestive tract tumors is considered to be similar to that of CEA. The combination of the two can improve the accuracy of diagnosis of digestive tract tumors, better guidance