Conclusion There were some image characteristics deserving being noticed and either ruptured or unruptured anterior communicating aneurysms with these special signs should be treated immediately.

• 结论出血型的颅内动脉瘤在影像学上的一些特征值得注意，所以建议对于有此典型特征并位于前交通动脉的动脉瘤，无论破裂与否，都应尽早治疗。