Intracranial aneurysms with special morphology found in operations

Objecfive To study some intracranial aneurysms with special morphology,variant site of rupture and abnormal aneurysms wall.Method 174 patients with intracranial aneurysms which were clipped through craniotomy from January 2001 to January 2007 were reviewed retrospectively.Fifteen cases (8.6%)were found with special morphology.Aneurysmal appearance,size and site of rupture,thickness of aneurysm wall,and relation with parent artery as well as significant branches were observed.Under high microscopic magnification,photoes were taken to compare with preoperative imaging data to collect imaging feature of these intracranial aneurysms.Results Of these 15 cases of intracraniai aneurysms,6 cases were with giant or potential rupture site ( in 2 eases,coils lcaked out from split after endovascular embolization and were healed by dislodgment through craniotomy),6 cases with lobular shape,1 case with rebleeding in 6 days after endovascular embolization to be verifed coils leaked out from the thin aneurysms wall,1 case formed by enlargement of bilateral anterior communicating-artery,and 1 case with posterior communicating artery aneurysm were not able to be clipped through craniotomy as thin aneurysms wall and neck and parent artery.Conclusions Preoperative angiography can reveal some imaging feature for the intracranial aneurysms with special morphology.Preoperative preparation is necessary. Key words: Intracranial aneurysm;  Angiography;  Surgical procedures