脑瘤引起的蛛网膜下腔出血

Subarachnoid Hemorrhage Caused by Brain Tumors

脑瘤引起的蛛网膜下腔出血(SAH)是瘤卒中的一种发作形式,临床上不常见到,文献报导也较少。由于其出血原因至今尚未清楚,诊断困难,特别是不易与其它原因引起的SAH相鉴别,病死率高,所以有必要给予重视。

61 cases of brain tumor with SAH confirmed by operation and pathological examination in the year of Jan 1956 to Sept 1981 were analyzed and reported. The incidence of SAH in brain tumor was 2.3%. The incidence of brain tumor with SAH among all spontaneous SAH was 7.5%.In this series melanoma had the highest incidence giving rise to SAH, and the next two were primary sarcoma and metastatic chorioepithelioma. The occurrence of SAH was related to the site of the tumor and not to the presence of syphilis, hypertension, head injury or radiotherapy. SAH caused by brain tumors can be differentiated from that caused by cerebral vascular diseases by their clinical characteristics, but usually special studies are needed in the diagnosis, such as CT scanning is the most effective procedure. The mortality rate brain tumor with SAH was higher than that without SAH. Therefore early diagnosis of brain tumor before the occurrence of hemorrhage and unconsciousness and treating them at appropriate time are mandatory for good operative results.