Clipping of Upward Projection Anterior Communicating Artery Aneurysms Adhering Tightly to the A2 Segment / 대한뇌혈관외과학회지

OBJECTIVE: The ideal treatment of intracranial aneurysms is an occlusion of the neck with a clip, which preserves the parent vessels. Upward projecting anterior communicating artery(Acom) aneurysms appear to be directed both above and below the plane formed by the two A2 segments, which usually conceal the contralateral A2 takeoff. It is difficult to perform complete clipping when these lesions are tightly adherent to the A2 segment. Neurosurgeons need to focus on the safe treatment of these lesions. A variety of clipping techniques can be used depending on the aneurysm anatomy, size, and morphology. The authors recommend a safe method of clipping these lesions safely. METHODS: The authors operated on 109 patients with upward projecting Acom aneurysms over the last 16 years. Among them, 34 aneurysms were clipped using fenestrated clips through the side of the dominant A1 segment, which were closely adhered to the A2 segment. RESULT: In each case, the aneurysm and both A2 segments formed a straight line in the narrow surgical field and were not easily separated, and consequently it was difficult to handle the aneurysm behind the ipsilateral A2. After partial identification of the Acom complex, careful dissection of the posterior aspect of the ipsilateral A2 and the aneurysm dome was continued to allow mobilization of both A2 segments and the aneurysm. All aneurysms were secured successfully without any surgery related complications. CONCLUSION: The authors recommend that fenestrated clip incorporating the ipsilateral A2 segment after complete mobilization of both A2 segments and the aneurysm may be useful for definitive clipping of upward projecting Acom aneurysm which is densely adherent to the A2 segment.

Fusiform Aneurysm of Proximal Anterior Cerebral Artery: Case Report

The authors report a case of fusiform aneurysm in the proximal anterior cerebral artery(ACA). A 44-year-old woman presented with severe headache after subarachnoid hemorrhage. The right carotid angiography demonstrated a fusiform aneurysm in the A1 segment of right ACA with vasospasm. Clipping of a fusiform right A1 aneurysm was performed via the right pterional approach. The postoperative cerebral angiography demonstrated complete occlusion of the fusiform aneurysm and moderate degree of vasospasm with preservation of A1 segment. The postoperative course was uneventful. We report a case of fusiform aneurysm of A1 segment that was successfully clipped with the fenestrated aneurysmal clip.

Application of Fenestrated Clip in the Intracranial Aneurysms: Report of Four Cases

Some aneurysms with peculiar shapes, large sized or in unusual location cannot be obliterated by ordinary methods. We present four cases using two kinds of fenestrated clips. There were 4 aneurysms in the 4 patients:3 saccular and 1 fusiform aneurysm. Two aneurysms were located in anterior communicating artery, one left carotico-opthalmic artery, and one distal middle cerebral artery. All of the aneurysms were successfully obliterated. Our results suggest that the various shape of fenestrated clips may be benefit for clipping difficult aneurysms, which would not be clipped with ordinary one.