Halprn 等认为6—羟甲基蝶呤(下简称蝶呤)是各种癌细胞在组织培养中特有的叶酸降解产物,Rao 等(1981)介绍用活性炭吸收尿中蝶呤,发现癌患者尿蝶呤含量是正常人和非癌患者的3～20倍。我们对 Rao 氏法作了某些改进,以上海产930荧光光度计检测正常人、非癌患者、各种恶性疾病称癌患者术后患蝶呤荧光强 Halprn and other 6-hydroxymethylporphyrin (hereinafter referred to as pterin) is a variety of cancer cells in tissue culture unique folic acid degradation products, Rao et al (1981) Introduction of activated carbon absorption of urine pterin, found that patients with cancer of the urinary butterfly The amount of nitric oxide is 3 to 20 times higher than that of normal and non-cancerous patients. We made some improvements to the Rao’s method, with Shanghai 930 fluorescence spectrophotometer detection of normal, non-cancer patients, a variety of malignant disease, said cancer patients with pylori fluorescence intensity