颅内肿瘤即简称脑瘤。1974年上海市脑瘤年调整发病率为1．143／10万。随着医学诊断技术的发展，尤其是CT和MRI扫描机的出现，对脑瘤可在无创伤条件下进行准确诊断，所以，发病率明显提高。北京市城区1991年肿瘤调整死亡率统计，脑瘤的调整死亡率为2．7／10万。随着诊断准确率的 Intracranial tumor is referred to as brain tumor. In 1974, the annual rate of brain tumor in Shanghai was 1.143 / 100,000. With the development of medical diagnostic techniques, especially the appearance of CT and MRI scanners, the diagnosis of brain tumors can be accurately diagnosed under the condition of no trauma. Therefore, the incidence rate is obviously increased. The city of Beijing in 1991 adjusted the death rate of cancer, brain tumor adjustment mortality rate of 2.7 / 100000. With the diagnostic accuracy