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。