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以两株单克隆抗体，ＧＳ－２及ＣＬ－３组合，用免疫电泳法检测粪便提取液中的癌相关抗原Ｓ－Ｔｎ，Ｔｎ及ＣＥＡ，检测的病例为胃癌７５例，直结肠癌６６例、胰腺癌８例，浅表性胃炎７例，萎缩性胃炎１５例，胃及十二指肠溃疡病２０例，胆囊结石１０例以及正常人１００例。结果表明：ＧＳ－２检测各组阳性率为：胃癌８０％，结肠癌５８．７％，胰腺癌１２．５％，正常人为９％，非恶性病变组０～１５％。ＣＬ－３检测各组阳性率为：胃癌７７．３％，结肠癌６０．６％，胰腺癌７５％，正常人组５％，非恶性病变５－１４２％，上两株单抗组合检测，胃癌阳性率提高到９４．５％，肠癌为８６．４％，正常人组１２％，非癌组为１７．３％。
Two monoclonal antibodies, GS-2 and CL-3 were combined to detect the cancer-associated antigens S-Tn, Tn and CEA in stool extracts by immunoelectrophoresis. Among the detected cases, there were 75 cases of gastric cancer and 66 cases of rectal cancer. There were 8 cases of pancreatic cancer, 7 cases of superficial gastritis, 15 cases of atrophic gastritis, 20 cases of gastric and duodenal ulcer diseases, 10 cases of gallbladder stones, and 100 cases of normal persons. The results showed that the positive rate of GS-2 in each group was 80% of gastric cancer, 58.7% of colon cancer, 12.5% of pancreatic cancer, 9% of normal, and 0 to 15% of non-malignant lesions. The positive rate of CL-3 in each group was 77.3% in gastric cancer, 60.6% in colon cancer, 75% in pancreatic cancer, 5% in normal group, and 5-142% in non-malignant lesions. The positive rate of gastric cancer was increased to 94.5%, that of intestinal cancer was 86.4%, that of normal persons was 12%, and that of non-cancer patients was 17.3%.