主动脉窦瘤是一种较少见的心血管畸形 ,瘤体一旦破裂 ,即产生显著的血流动力学改变 ,常危及患者生命。典型病例诊断不难 ,但临床表现不典型者极易误诊误治。近 17年来 ,我院共误诊 12例 ,现分析如下。临床资料 :本组男 8例 ,女 4例 ;年龄 9～ 4 7岁。误诊为动脉导管未闭 4例 , Aortic sinus aneurysm is a rare cardiovascular malformation, once the tumor ruptures, resulting in significant hemodynamic changes, often endangering patients’ lives. Typical case diagnosis is not difficult, but atypical clinical manifestations are extremely easy to misdiagnosis and mistreatment. In the past 17 years, our hospital misdiagnosed 12 cases, the analysis is as follows. Clinical data: The group of 8 males and 4 females; aged 9 to 47 years old. Misdiagnosed as patent ductus arteriosus in 4 cases,