Objective      To analyze the diagnosis of paraclinoid aneurysm

and its indications for endovascular embolization and prevention for complications.       Methods      The clinical data of 40 cases of paraclinoid aneurysms (46) undergoing endovascular embolization in our department from January 2009 to May 2012 were retrospectively reviewed. Among the 40 cases

endovascular coil embolization was used in 21 cases

stent-assisted coil embolization was used in 8

and balloon-assisted coil embolization was used in 4. There were 7 cases quitting the treatment. The efficiency of the treatment was analyzed

and postoperative follow-up was conducted by CT

3D-CTA

MRI and/or 3D-DSA.       Results      Immediate post-procedure angiography showed that complete obliteration of aneurysm was achieved in 33 cases (38 aneurysms). Thirty-five cases were followed up by 3D-CTA and/or DSA within 3 to 48 months. The final clinical outcomes showed Glasgow outcome score (GOS) was 5 in 27 patients

4 in 3

3 in 1

2 in 1 and 1 in 3 cases. No recurrence and rebleeding was found in 28 cases with endovascular embolization treatment. In the 7 patients who quitted the treatment

4 with unruptured aneurysm had no bleeding observed

and the 3 re-bleeding cases were die finally due to bleeding.       Conclusion      Endovascular therapy is a minimally invasive

safe and effective treatment for paraclinoid aneurysms

which can be properly evaluated by 3D-CTA and 3D-DSA.