Using the method of immunoradiometry, serum MG-Ags levelwas measured in 31 patients with rectal carcinoma (RC) and was compared with 26 patients with colonic polyps (CP).

• 用免疫放射法测定31例直肠癌患者血清MG-AgS水平,并与26例结肠息肉组进行对比。