脑转移瘤(ｂｒａｉｎｍｅｔａｓｔａｓｅｓ,ＢＭ)在颅内肿瘤中的发病率呈上升趋势,癌症死亡病人尸检ＢＭ发现率10%～15%,ＢＭ的2/3为多发,囊肿型ＢＭ占总数的16%[1]。我们自1994年采用一次性60钴全脑放疗加多次脑立体定向32Ｐ囊内放疗方法治疗囊肿型脑转移瘤21例,取得较好疗效, The incidence of brain metastases (brain metastases) in intracranial tumors is on the rise. Autopsies of cancer deaths are found in 10% to 15% of autopsy BM, 2/3 of BM are multiple, and cyst type BM accounts for 16% of the total [ 1]. Since 1994, we have adopted one-time 60 cobalt whole brain radiotherapy plus multiple stereotactic 32P intracapsular radiotherapy to treat cyst type brain metastases in 21 cases, and achieved good results,