The cerebral vascular malformations are pathologically divided into four types: arteriovenous malformations ( including arteriovenous fistula), cavernous angiomas, venous angiomas, and capillary telangiectases. 按病理学分类颅内血管畸形分为:动静脉畸形(包括动静脉瘘),海绵状血管瘤,静脉血管瘤(或静脉发育异常)以及毛细血管扩张症四种不同类型。