成神经管细胞瘤系高恶性肿瘤,易广泛转移至软脑膜,故常在术后照射整个神经轴,使其五年生存率增至50%以上.作者在1967～70年于明尼苏达大学对14例用~(60)Co外照射脑与脊髓,并从鞘内给~(198)Au增强治疗,后来在3例长期存活者颅内发生了脑的动脉瘤.此3例中,男性2例,女性1例.诊断小脑成神经管细胞瘤时的年龄分别为2、5及14岁,发生脑的囊状动脉瘤时的年龄分别在21、14及31岁,且 The medulloblastoma is a high-grade tumor that is easily metastasized to the pia mater. It often irradiates the entire nerve axis after surgery, increasing its five-year survival rate to more than 50%. The authors studied at the University of Minnesota in 1967-70. Brain and spinal cord were externally irradiated with ~(60)Co, and enhanced treatment with ~(198) Au was performed intrathecally. Brain aneurysms developed in the brain of 3 cases of long-term survivors. Of the 3 cases, 2 were male. In 1 female, the age at diagnosis of medulloblastoma of the cerebellum was 2, 5, and 14 years, respectively. The ages of cystic aneurysms of the brain were 21, 14 and 31 years old, respectively.