Imaging features and classification study of false aneurysm after the rupture of intracranial aneurysm

Objective To discuss the DSA imaging characteristic and classification of the false aneurysm and true aneurysm complex at the rupture position after intracranial aneurysmal subarachnoid hemorrhage. Methods CT scan and DSA imaging were performed in 50 patients (50 ruptured aneurysm). Results 50 ruptured aneurysm showed SAH by different amount of hemorrhage. DSA test all showed the forming of false aneurysm at the rupture position, tiny, round or near round irregular false aneurysm cavity can be found outside the true aneurysm cavity. According to the DSA imaging presentation we can divide them into three types: 11 cases were type A (near teapot), 27 cases were type B (near gourd), 12 cases were type C (near dumbbell). Conclusion The false aneurysm can form around the rupture position after intracranial rupture, the false aneurysm cavity and true aneurysm cavity together form a special aneurysm complex, it's imaging characteristic under DSA can be divided into three types.