纽约大学医学中心放射肿瘤部从1972年到1986年无选择收治846例脑转移患者,从中选出52例接受二程全脑放疗。病例选择标准:一程放疗后全身维持良好的一般状况至少四个月,并有新出现的神经系统功能减退的主诉。52例患者中男女各半,年龄29到84岁,从原发肿瘤诊断到脑转移诊断的中位间隔为13个月。原发肿瘤部位如下:肺30例;乳腺 The Department of Radiation Oncology at New York University Medical Center did not choose to treat 846 patients with brain metastases from 1972 to 1986, and selected 52 patients to receive two-way whole brain radiotherapy. Case selection criteria: After the whole course of radiotherapy, the whole body maintained a good general condition for at least four months, and there was a new chief complaint of impaired nervous system function. Of the 52 patients, half were male and female, aged 29 to 84 years. The median interval from diagnosis of primary tumor to diagnosis of brain metastases was 13 months. The primary tumor site is as follows: 30 cases of lung; breast