• Journal of Korean Neurosurgical Society
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• 제66권2호
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• pp.199-204
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• 2023

It is critical to identify the ruptured cerebral arteriovenous malformations (AVMs) for secondary prevention. However, there are rare cases unidentified on the radiological evaluation. We report on a patient with the delayed appearance of radiologically occult AVM as a probable cause of the previous intracerebral hemorrhage (ICH). An 18-year-old male patient presented with a right temporal ICH. The preoperative radiological examination did not reveal any causative lesions. Because of the intraoperative findings suggesting an AVM, however, only hematoma was evacuated. Disappointedly, there were no abnormal findings on postoperative and follow-up radiographic examinations. Eleven years later, the patient presented with an epileptic seizure, and an AVM was identified in the right temporal lobe where ICH had occurred before. The patient underwent partial glue embolization followed by total surgical resection of the AVM and anterior temporal lobe. Based on the literature review published in the era of magnetic resonance imaging, common clinical presentation of radiologically occult AVMs included headache and seizure. Most of them were confirmed by pathologic examination after surgery. In cases of the ICH of unknown etiology in young patients, long-term follow-up should be considered.

• Journal of Korean Neurosurgical Society
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• 제30권6호
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• pp.705-710
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• 2001

목 적 : 파열된 뇌동맥류 수술후 경련발작은 잘 알려진 합병증으로 항경련제 치료가 요구된다. 저자들은 뇌동맥류 파열에 의한 지주막하출혈 환자에서 수술후 경련발작의 위험인자를 조사하여 경련발작 치료에 임상적 의의를 비교 하고자 한다. 방 법 : 1990년부터 1996년까지 파열된 뇌동맥류로 개두술을 시행한 321명의 환자중 1년 이상 추적관찰(1~4.6년)하였던 206명을 대상으로 후향적 방법으로 조사하였다. 모든 환자는 수술후 3~18개월 동안 예방적 항경련제 치료를 받았다. 경련발작에 기여하는 요인으로서 연령, 성별, 내원 당시 신경학적 상태, 수술전후 전산화단층촬영소견, Hunt-Hess grade, Fisher grade, 뇌동맥류의 위치, 고혈압의 기왕력, 수술시기, 그리고 지연성 신경학적 결손 등을 조사하여 비교 분석하였다. 통계적 검증분석 방법으로 chi-square test와 Fisher's exact test를 이용하였다. 결 과 : 평균 추적관찰기간은 1.8년으로 206명중 18명이 경련발작 소견을 보여 8.7%의 발생률을 보였다. 연령에서 나이가 적을수록, 파열된 동맥류의 위치가 중뇌동맥인 경우에서 경련발작이 높게 나타났다. 지연성 신경학적 결손을 보인 42명의 환자에서 8명(19%)이 경련발작이 발생하여 높은 통계학적 유의성을 보였다. 또한 고혈압의 기왕력, 수술후 뇌전산화촬영상 뇌경색등도 이와 관련성이 있었고, 수술전후 뇌내혈종의 소견이 관찰되면 또한 경련발작이 높게 발생되었다. 그러나 Hunt-Hess grade, Fisher grade, Glasgow Outcome Scale, 그리고 출혈후 수술의 시기 등은 경련발작의 발생빈도와는 통계학적 유의성을 보이지 않았다. 결 론 : 뇌동맥류 파열에 의한 수술후 경련발작의 위험인자로 낮은 연령, 중뇌동맥류, 지연성 신경학적 결손, 수술후 뇌전산화촬영상 뇌경색소견, 고혈압, 그리고 수술전후 뇌내혈종의 유무 등이 연관되었고, 이러한 경련발작의 유발인자를 인지함으로서 수술후 경련발작에 대한 예방과 치료에 도움을 줄 수가 있으며 이에 대한 전향적 연구가 요구된다.

• Journal of Korean Neurosurgical Society
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• 제64권2호
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• pp.198-206
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• 2021

Objective : The low-profile Neuroform Atlas stent can be deployed directly without an exchange maneuver by navigating into the Gateway balloon. This retrospective study assessed the safety and efficacy of Neuroform Atlas stenting as a rescue treatment after failure of mechanical thrombetomy (MT) for large artery occlusion. Methods : Between June 2018 and December 2019, a total of 31 patients underwent Neuroform Atlas stenting with prior Gateway balloon angioplasty after failure of conventional MT caused by residual intracranial atherosclerotic stenosis (ICAS). Primary outcomes were successful recanalization and patency of the vessel 24 hours after intervention. Secondary outcomes were vessel patency after 14 days and 3-month modified Rankin Scale. Peri-procedural complications, intracerebral hemorrhage (ICH), and 3-month mortality were reviewed. Results : With a 100% of successful recanalization, median value of stenosis was reduced from 79.0% to 23.5%. Twenty-eight patients (90.3%) showed tolerable vessel patency after 14 days. New infarctions occurred in three patients (9.7%) over a period of 14 days; two patient (6.5%) underwent stent occlusion at 24 hours, and the other patient (3.2%) with delayed stent occlusion had a non-symptomatic dot infarct. There were no peri-procedural complications. Two patients (6.5%) developed an ICH immediately after the procedure with one of them is symptomatic. Conclusion : Neuroform Atlas stenting seems to be an effective and safe rescue treatment modality for failed MT with residual ICAS, by its high successful recanalization rate with tolerable patency, and low peri-procedural complication rate. Further multicenter and randomized controlled trials are needed to confirm our findings.

• Journal of Korean Neurosurgical Society
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• 제29권8호
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• pp.1126-1135
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• 2000

Objectives : The goal of surgical management of cerebral arteriovenous malformation(AVM) is elimination of the lesion without development of new neurological deficits. To improve the management results of cerebral AVMs in the future, this article discusses about surgical complications of the AVM and their management. Material and Methods : During the past 18 years, 116 patients with cerebral AVMs were managed by surgery. Among these cases, 7 cases died, 7 cases developed new neurological deficits, 11 cases residual AVM and 5 cases intracerebral hematoma(ICH) after surgery. The author analyzes the causes of those complications and investigates the methods to minimized those complications based on the review of the literatures. Results : One stage removal of AVM and ICH in the poor neurological state were performed in 5 of 7 death cases. Subtotal removal of ICH followed by delayed AVM surgery after recovery is regard as one method to improve the outcome of patient with large ICH. Postoperative new neurological deficits developed owing to normal perfusion pressure breakthrough(NPPB) in 3, judgement error in 2, preoperative embolization in 1 and cortical injury in 1 case(s). Proper management of NPPB, accurate anatomical knowledge and physiological monitoring during operation, and well trained skill for embolization are regard as methods to minimize those complications. Residual AVMs after surgery were noticed in 11 cases, in which unintended 6 cases due to inaccurate dissection of peripheral margin of AVM, and intended 3 cases due to massive brain swelling during operation, 1 cases due to diffuse type and 1 case due to multiple type of AVM. Accurate dissection of peripheral margin of AVM and mild hypotension during operation may help to avoid this complication. Postoperative hemorrhage occurred in 3 cases due to rupture of the residual AVM and in 2 cases due to oozing from the AVM bed. Complete resection of AVM, complete control of bleeding points at AVM bed and mild hypotension during early postoperative period are the methods to avoid this complication. Conclusion : A precise but flexible therapeutic strategy and refined skill for endovascular, radiosurgical and microsurgical techniques are required to successful treatment of cerebral AVM. Adequate timing of AVM resection, accurate anatomical knowledge, proper management of NPPB and accurate dissection of peripheral margin of AVM are the key points for avoiding complications of the AVM surgery.