对临床、病理、放射线或ＣＴ检查确诊的２０名脑瘤患者，在放疗前后进行血清微量元素Ｆｅ，Ｚｎ、Ｃｕ、Ｍｎ、Ｓｅ、Ｃｒ、Ｃｏ、Ｎｉ的测定分析。研究的结果表明：①脑瘤患者放疗后与放疗前比较，血清铁、锌、铜、硒、铬、钴、镍含量均较低，唯有锰较高；②脑瘤患者放疗后血清锌与其它元素的比值与放疗前比较，Ｃｕ／Ｚｎ、Ｍｎ／Ｚｎ、Ｎｉ／Ｚｎ、Ｃｏ／Ｚｎ比值较高；③脑瘤患者与对照组比较，血清铜、镍、铁含量较高，而硒、锌含量明显低，锰、铬、钴含量稍低，④健康人血清锌与其它元素的比值与脑瘤患者比较，Ｆｅ／Ｚｎ、Ｃｕ／Ｚｎ、Ｎｉ／ｚｎ较低而Ｓｅ／Ｚｎ、Ｃｒ／Ｚｎ、Ｃｏ／ｚｎ较高。 Twenty patients with brain tumor diagnosed by clinical, pathological, radiological or CT examination were analyzed before and after radiotherapy for determination of serum trace elements Fe, Zn, Cu, Mn, Se, Cr, Co and Ni. The results of the study showed that: (1) serum iron, zinc, copper, selenium, chromium, cobalt and nickel contents were lower in patients with brain tumor after radiotherapy than before radiotherapy, The ratios of other elements were higher in Cu / Zn, Mn / Zn, Ni / Zn and Co / Zn ratios compared with that before radiotherapy; ③The contents of copper, nickel and iron in brain tumor were higher than those in control group, The content of Zn, Cu, Zn and Cu in the healthy people were lower than that of the other patients. The ratios of Se / Zn, Cr / Zn and Ni / Zn, Co / zn higher.