Objective To assess the performance of new system of high-throughput enzyme-linked immunosorbent assay(ELISA)in detecting carcinoembryonic antigen(CEA)and its clinical relevance. Methods According to directory documents EP5-A2,EP6-A and EP9-A2 of CLSI,the precision,linearity and bias of the technique were evaluated.Serum samples were collected from 289 cases,which were divided into malignant digestive tract tumor group(group A),benign digestive tract disease group(group B)and normal control group(group C).T...