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  • Title: Surgical management of vertebral and basilar artery aneurysms: a single center experience in 41 patients.
    Author: Shi X, Qian H, Singh KC, Zhang Y, Zhou Z, Sun Y, Liu F.
    Journal: Acta Neurochir (Wien); 2013 Jun; 155(6):1087-93. PubMed ID: 23471600.
    Abstract:
    OBJECTIVE: To study an effective method for surgical management of vertebral and basilar artery aneurysms. METHODS: Forty-one patients with 43 aneurysms of the vertebral and basilar arteries were managed by microsurgical clipping. Cerebral angiography revealed basilar apex aneurysms in 17 patients, basilar trunk in six patients, vertebrobasilar (VB) junction aneurysms in three patients and vertebral aneurysms in 15 patients. One patient had two basilar aneurysms, and another had bilateral vertebral artery aneurysm. SURGICAL TECHNIQUE: We used a pterional approach in basilar apex aneurysms (n = 17 patients), orbitozygomatic and its variants in upper basilar trunk aneurysms (n = 2 patients), combined petrosal and far-lateral approach in mid basilar trunk aneurysms (n = 4 patients), far-lateral and transcondylar approach for the aneurysms at VB junction (n = 3 patients) and transcondylar approach for the vertebral aneurysms (n = 15 patients). Bypass graft was performed in 14 patients with fusiform and wide neck aneurysms, to prevent potential cerebral ischemia due to prolonged temporary occlusion or possibility of intraoperative parent artery sacrifice. RESULTS: Neurological outcomes were measured on the basis of Glasgow Outcome Score (GOS). The rate of back-to-normal life after surgery in basilar tip aneurysm, basilar trunk aneurysms, VB junction aneurysms and vertebral artery aneurysms was 15/17 (82.5 %), 5/6 (83 %), 3/3 (100 %) and 14/15 (93.3 %), respectively. Thirty-six (87.8 %) patients had uneventful postoperative courses. Two patient with basilar apex aneurysm suffered severe neurological deficits related to midbrain ischemia, two patient with occipital artery (OA) graft bypass had postoperative partial lower cranial nerve palsy, and one death with basilar trunk aneurysm occurred after the 20th day of surgery. Thirty-nine patients accepted postoperative digital subtraction angiography (DSA) and eight patients accepted computed tomography (CT) angiogram, whereas two patient denied either one. All the images demonstrated afferent and efferent vessels without aneurysm in situ. Out of 14 patients with graft bypass, 11 patients on cerebral angiographies disclosed the aneurysm clip and the graft bypass patency, one patient on angiography had unidentified graft bypass patency but no symptom related to the graft bypass patency, and two patients denied the postoperative cerebral angiographies. In 40 patients with a mean follow-up of 3.4 years, 37 patients had good outcome, two patients needed assistance for daily living, and one death occurred due to brainstem infarction related to surgery. CONCLUSION: Selection of proper cranial base approach with adequate exposure is effective in clipping VB aneurysms, minimizing the postoperative complications. Graft bypass may avoid parent artery sacrifice and its branches occlusion in patients with fusiform and wide neck aneurysms.
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