Before and during the endovascular operation, all the cases were diagnosed as follows: arteriovenous fistula in 23 cases, cirsoid angioma 32 and cavernous hemangioma 28.

• 本组病例术前或术中分别诊断为：动静脉瘘23例，蔓状血管瘤32例，海绵状血管瘤28例。