抄録
As much as 20% of the P2-P3 aneurysms are fusiform, thrombosed, and giant types and since an intimate relationship is present between the cranial nerves and upper brain stem, the surgical approach and dissection of the P2-P3 aneurysm is technically challenging. We present 3 cases of P2-P3 partially thrombosed giant aneurysms treated by means of each procedure. Case 1 involved a P2 aneurysm, and successful clipping was performed using circulatory arrest with profound hypothermia. The perforating branch was preserved. Case 2 involved a P2-P3 aneurysm, and surgical ligation of the P2 proximal to the aneurysm was performed because the parent artery was totally thrombosed. Case 3 involved an aneurysm of the P3 segment, and parent artery occlusion was performed using microcoils after selective P3 balloon occlusion test. All patients had either an excellent or good outcome. These operative approaches and procedures should be discussed in relation to the anatomy of P2-P3 aneurysms.
