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Unruptured cerebral aneurysm

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https://www.readbyqxmd.com/read/28912279/differences-in-morphologic-and-hemodynamic-characteristics-for-phases-based-intracranial-aneurysm-locations
#1
N Varble, H Rajabzadeh-Oghaz, J Wang, A Siddiqui, H Meng, A Mowla
BACKGROUND AND PURPOSE: Several recent prospective studies have found that unruptured intracranial aneurysms at various anatomic locations have different propensities for future rupture. This study aims to uncover the lack of understanding regarding rupture-prone characteristics, such as morphology and hemodynamic factors, associated with different intracranial aneurysm location. MATERIALS AND METHODS: We investigated the characteristics of 311 unruptured aneurysms at our center...
September 14, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28904824/a-case-of-unruptured-aneurysm-of-the-internal-carotid-artery-presenting-as-olfactory-hallucinations
#2
Jiro Akimoto, Norio Ichimasu, Rei Haraoka, Shinjiro Fukami, Michihiro Kohno
BACKGROUND: Olfactory hallucination, a symptom of medial temporal lobe epilepsy, is rarely associated with unruptured intracranial aneurysms. CASE DESCRIPTION: We encountered this situation in a 70-year-old woman with an unruptured aneurysm at the bifurcation of the internal carotid and posterior communicating artery. We were able to achieve epileptic control by craniotomy clipping and medial temporal lesionectomy. CONCLUSION: According to our knowledge, previous reports are limited to cases of large middle cerebral artery aneurysms compressing the lateral orbitofrontal cortex, and this is apparently the first report of a case where olfactory hallucinations occurred from direct stimulation of the entorhinal cortex by an internal carotid and posterior communicating artery bifurcation aneurysm...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28904583/giant-unruptured-middle-cerebral-artery-aneurysm-presenting-with-complex-partial-seizure-a-short-review
#3
Guru Dutta Satyarthee, Manmohan Singh
Intracranial aneurysm is a rare cause of seizure although few cases may develop new onset seizure following rupture of aneurysm. The causes of seizure in ruptured aneurysm may be caused due to presence of subarachnoid hemorrhage, intracerebral hematoma, infarct due to progressive vasospasm, worsening of hydrocephalus, or even after surgical craniotomy for clipping of aneurysm. However, incidental aneurysm solely presenting with complex partial seizure is not reported in literature. To the best of knowledge of authors, current case represents the first case as incidental aneurysm presenting with seizure and pertinent literature is briefly reviewed...
April 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28887278/comparison-of-unilateral-and-bilateral-craniotomy-for-the-treatment-of-bilateral-middle-cerebral-artery-aneurysms-anatomical-and-clinical-parameters-and-surgical-outcomes
#4
Min Jai Cho, Chang Wan Oh, O-Ki Kwon, Hyoung Soo Byoun, Si Un Lee, T Kim, Seung Pil Ban, Jae Seung Bang
OBJECTIVE: To compare two craniotomy approaches (unilateral and bilateral) in terms of anatomical and clinical parameters and surgical outcomes. METHODS: From January 2011 to December 2014, 19 patients with bilateral unruptured middle cerebral artery (MCA) aneurysms were treated with unilateral craniotomy (group 1) and 10 patients were treated with bilateral mini-craniotomy (group 2). We compared demographic data, characteristics of aneurysms, radiological and clinical parameters, postoperative complications, and surgical outcomes between the groups...
September 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28881114/intra-arterial-and-intravenous-tirofiban-infusion-for-thromboembolism-during-endovascular-coil-embolization-of-cerebral-aneurysm
#5
Sang Heum Kim, Tae Gon Kim, Min Ho Kong
OBJECTIVE: Thromboembolism is the one of the most serious complications that can occur during endovascular coil embolization of cerebral aneurysm. We report on the effectiveness and safety of intra-arterial/intravenous (IA/IV) glycoprotein IIb/IIIa inhibitor (tirofiban) infusion for treating thromboembolism during endovascular coil embolization of cerebral aneurysm. METHODS: We performed a retrospective analysis of 242 patients with ruptured or unruptured cerebral aneurysms (n=264) who underwent endovascular coil embolization from January 2011 to June 2014...
September 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28881112/morphological-and-hemodynamic-parameters-for-middle-cerebral-artery-bifurcation-aneurysm-rupture-risk-assessment
#6
Hao Qin, Qixia Yang, Qiang Zhuang, Jianwu Long, Fan Yang, Hongqi Zhang
OBJECTIVE: To investigate the morphological and hemodynamic parameters associated with middle cerebral artery (MCA)bifurcation aneurysm rupture. METHODS: A retrospective study of 67 consecutive patients was carried out based on 3D digital subtraction angiography data. Morphological and hemodynamic parameters including aneurysm size parameters (dome width, height, and perpendicular height), longest dimension from the aneurysm neck to the dome tip, neck width, aneurysm area, aspect ratio, Longest dimension from the aneurysm neck to the dome tip (Dmax) to dome width, and height-width, Bottleneck factor, as well as wall shear stress (WSS), low WSS area (LSA), percentage of LSA (LSA%) and energy loss (EL) were estimated...
September 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28841119/predictive-anatomical-factors-for-rupture-in-middle-cerebral-artery-mirror-bifurcation-aneurysms
#7
Homajoun Maslehaty, Crescenzo Capone, Roman Frantsev, Igor Fischer, Ramazan Jabbarli, Jan F Cornelius, Marcel A Kamp, Paolo Cappabianca, Ulrich Sure, Hans-Jakob Steiger, Athanasios K Petridis
OBJECTIVE The aim of this study was to define predictive factors for rupture of middle cerebral artery (MCA) mirror bifurcation aneurysms. METHODS The authors retrospectively analyzed the data in patients with ruptured MCA bifurcation aneurysms with simultaneous presence of an unruptured MCA bifurcation mirror aneurysm treated in two neurosurgical centers. The following parameters were measured and analyzed with the statistical software R: neck, dome, and width of both MCA aneurysms-including neck/dome and width/neck ratios, shape of the aneurysms (regular vs irregular), inflow angle of both MCA aneurysms, and the diameters of the bilateral A1 and M1 segments and the frontal and temporal M2 trunks, as well as the bilateral diameter of the internal carotid artery (ICA)...
August 25, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28840081/segmental-aplasia-of-bilateral-internal-carotid-arteries-accompanied-by-intracranial-aneurysms-a-case-report
#8
Toshiyuki Ohtani, Keiya Iijima, Kaoru Aishima, Hajime Wada, Nobuo Sasaguchi, Hideyuki Kurihara
A 68-year-old woman presented with segmental aplasia of bilateral internal carotid arteries accompanied by unruptured intracranial aneurysms. The abnormality was discovered incidentally at the age of 44 years. Cerebral angiography showed occlusion of bilateral internal carotid arteries, and the carotid territory was supplied by each posterior communicating artery with small intracranial aneurysms. Endovascular treatment for the intracranial aneurysms was planned. However, the patient did not want to undergo the endovascular procedure because of the increased risk due to the associated bilateral carotid abnormalities...
July 2017: NMC Case Rep J
https://www.readbyqxmd.com/read/28839527/a-new-imaging-tool-for-realtime-measurement-of-flow-velocity-in-intracranial-aneurysms
#9
Athanasios K Petridis, Marius Kaschner, Jan F Cornelius, Marcel A Kamp, Angelo Tortora, Hans-Jakob Steiger, Bernd Turowski
With modern imaging modalities of the brain a significant number of unruptured aneurysms are detected. However, not every aneurysm is prone to rupture. Because treatment morbidity is about 10% it is crucial to identify unstable aneurysms for which treatment should be discussed. Recently, new imaging tools allow analysis of flow dynamics and wall stability have become available. It seems that they might provide additional data for better risk profiling. In this study we present a new imaging tool for analysis of flow dynamics, which calculates fluid velocity in an aneurysm (Phillips Electronics, N...
June 7, 2017: Clinics and Practice
https://www.readbyqxmd.com/read/28838124/minimally-invasive-transpalpebral-eyelid-approach-to-unruptured-middle-cerebral-artery-aneurysms
#10
Mauricio Mandel, Rafael Tutihashi, Suzana Abramovicz Mandel, Manoel Jacobsen Teixeira, Eberval Gadelha Figueiredo
BACKGROUND: Although recent technological advances have led to successful endovascular treatment, middle cerebral artery (MCA) aneurysms are still prone to surgery. Because minimally invasive options are limited and possess several functional and cosmetic drawbacks, a transpalpebral approach is proposed as a new alternative. OBJECTIVES: To describe and assess surgical results of the minimally invasive transpalpebral approach in patients with MCA aneurysms. METHODS: The data of 25 patients with unruptured MCA aneurysms from 2013 to 2016 were included in a cohort prospective database...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28826708/occlusion-status-on-magnetic-resonance-angiography-is-associated-with-risk-of-delayed-ischemic-events-in-cerebral-aneurysms-treated-with-stent-assisted-coiling
#11
Takayuki Kikuchi, Akira Ishii, Hideo Chihara, Daisuke Arai, Mitsushige Ando, Yohei Takenobu, Tomohisa Okada, Yasushi Takagi, Susumu Miyamoto
OBJECTIVE: Management after stent-assisted coiling (SAC) for unruptured intracranial aneurysm is sometimes difficult because close monitoring for ischemic events for a long period of time after the procedure is necessary. The purpose of this study was to clarify the usefulness of magnetic resonance angiography (MRA) at follow-up after SAC. METHODS: Sixty-six consecutive cases of SAC for unruptured intracranial aneurysm in our institute and affiliated hospitals were retrospectively reviewed for a delayed ischemic event...
August 4, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28826580/comparison-of-rates-of-growth-between-unruptured-and-ruptured-aneurysms-using-magnetic-resonance-angiography
#12
Zenichiro Watanabe, Noriaki Tomura, Isao Akasu, Ryoji Munakata, Kazuomi Horiuchi, Kazuo Watanabe
BACKGROUND AND PURPOSE: Growth is a key risk factor for rupture of unruptured cerebral aneurysms. There are few reports of investigations into the actual growth of ruptured intracranial aneurysms. The aim of the present study was to ascertain the risk of rupture of aneurysms based on the growth of unruptured and ruptured aneurysms. METHODS: Changes in size on magnetic resonance angiography (MRA) were examined in 50 patients with ruptured cerebral aneurysms. Images obtained before and after subarachnoid hemorrhage were used...
August 17, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28774792/macrophage-imaging-of-cerebral-aneurysms-with-ferumoxytol-an-exploratory-study-in-an-animal-model-and-in-patients
#13
Tomohiro Aoki, Makoto Saito, Hirokazu Koseki, Keiichi Tsuji, Atsushi Tsuji, Kiyoshi Murata, Hidetoshi Kasuya, Akio Morita, Shuh Narumiya, Kazuhiko Nozaki
OBJECTIVE: The purpose of this study is to assess the validity and feasibility of macrophage imaging using an ultrasmall superparamagnetic iron oxide nanoparticle, ferumoxytol, in the cerebral aneurysmal wall in an animal model and in humans. MATERIALS AND METHODS: Engulfment of ferumoxytol by primary culture of macrophages and RAW264.7 cells was assessed. Uptake of ferumoxytol was evaluated histologically in a cerebral aneurysmal model in rats. In an exploratory clinical study of magnetic resonance macrophage imaging, 17 unruptured aneurysms in 17 patients were imaged using thin-slice gapless magnetic resonance images of 2D-gradient-recalled echo (2D-GRE) and 3D-T1-fast-spin echo sequences on day 0 and of the same sequences with infusion of ferumoxytol 24 hours after the first imaging...
July 31, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28761525/the-minipterional-approach-for-ruptured-and-unruptured-anterior-circulation-aneurysms-our-initial-experience
#14
Kenan A Alkhalili, Jack R Hannallah, Gasser H Alshyal, Mohab M Nageeb, Khaled M Abdel Aziz
OBJECTIVE: To report our experience with the minipterional (MPT) craniotomy approach for anterior circulation aneurysms and to discuss the clinical outcomes as well as to evaluate the advantages of this unique approach. MATERIALS AND METHODS: Single-center retrospective review of 57 cases involving anterior circulation aneurysms both ruptured and unruptured aneurysms treated with the MPT. We analyzed the clinical and patient demographic data, aneurysm characteristics, surgical outcomes, and complications in these individuals...
July 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28735142/bifurcation-location-and-growth-of-aneurysm-size-are-significantly-associated-with-an-irregular-shape-of-unruptured-intracranial-aneurysms
#15
Xin Feng, Baorui Zhang, Erkang Guo, Luyao Wang, Zenguhi Qian, Peng Liu, Xiaolong Wen, Wenjuan Xu, Chuhan Jiang, Youxiang Li, Zhongxue Wu, Aihua Liu
BACKGROUND AND OBJECTIVE: Previous studies firmly proved that an irregular aneurysmal shape was strongly associated with intracranial aneurysm (IA) rupture, but it is unclear how irregularly shaped intracranial aneurysms (IAs) form. We aimed to identify the factors related to irregular shape of IAs. METHOD: We retrospectively analyzed of consecutive patients evaluated or treated for IA at our institution from June 2015 to July 2016. According to the imaging morphology of aneurysm, the enrolled patients are divided into irregular and regular group...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28733907/multiple-intracranial-aneurysms-a-direct-hemodynamic-comparison-between-ruptured-and-unruptured-vessel-malformations
#16
Philipp Berg, Oliver Beuing
PURPOSE: Despite numerous studies addressing the rupture risk of intracranial aneurysms that have been published, the assessment thereof still remains challenging. Image-based simulations enable a precise prediction of patient-specific blood flow information. However, those approaches normally consider only small segments of the complete cerebral vasculature. METHODS: To test the validity of the consideration of single aneurysms in one computational setup, domains of the complete anterior and posterior circulations with multiple intracranial aneurysms (MIA) were simulated...
July 21, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28711292/perioperative-stroke-after-cerebral-aneurysm-clipping-risk-factors-and-postoperative-impact
#17
Ahmed I Kashkoush, Brian T Jankowitz, Chris Nguyen, Paul A Gardner, Daniel A Wecht, Robert M Friedlander, Yue-Fang Chang, Miguel Habeych, Donald Crammond, Jeffrey Balzer, Parthasarathy D Thirumala
Stroke is a devastating complication after intracranial aneurysm clipping. Understanding the risk factors that prognosticate perioperative stroke may help to identify patients that would benefit from neuroprotective therapy. This study assesses patient-specific independent predictors of perioperative stroke in relation to surgical aneurysm clipping. Additionally, this study evaluates the postoperative complications of stroke. We performed a retrospective chart review of 437 patients with ruptured and unruptured intracranial aneurysms, which underwent surgical clipping from 2006 to 2013...
October 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28692510/giant-serpentine-middle-cerebral-artery-aneurysm
#18
Xiao-Xiao Peng, Ming-Xin Wang, Hong-Xing Li, Ji-Rong Zhang
Giant serpentine aneurysms are rare entity, which have unique presentations and distinct angiographic features, with poor prognosis if not treated. In this paper, a patient with a giant serpentine aneurysm originated from right middle cerebral artery was reported. A 38-year-old woman suffered from progressively headache and vision declined. The computed tomography and magnetic resonance image revealed a partially calcified, large mass (approximately 80 × 70 × 60 mm sized) in the right frontal-temple lobe...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28689391/the-incidence-and-characteristics-of-patients-with-small-ruptured-aneurysms-5-mm-in-subarachnoid-hemorrhage
#19
Joon-Ho Choi, Hyun-Seok Park
OBJECTIVE: Small unruptured aneurysms (<5 mm) are known for their very low risk of rupture, and are recommended to be treated conservatively. However, we encounter many patients with small ruptured aneurysms in the clinical practice. We aimed to investigate the incidence and characteristics of patients with small ruptured aneurysms. METHODS: We reviewed all patients admitted to our hospital with subarachnoid hemorrhage from January 2005 to December 2015. The patients were divided into two groups: those with aneurysms <5 mm (group S) and those with aneurysms ≥5 mm (group L)...
July 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28664014/super-selective-balloon-test-occlusion-of-the-posterior-communicating-artery-in-the-treatment-of-a-posterior-cerebral-artery-fusiform-aneurysm-a-case-report
#20
Makoto Isozaki, Hiroshi Arai, Hiroyuki Neishi, Ryuhei Kitai, Ken-Ichiro Kikuta
We report the case of a 49-year-old man with underlying hypertension who developed diplopia lasting 2 months. Magnetic resonance imaging and digital subtraction angiography showed multi-lobular unruptured aneurysms in the P2 portion of the posterior cerebral artery (PCA) migrating into the interpeduncular cistern of the midbrain. Because the shapes of the aneurysms were serpentine fusiform and the posterior communicating artery (PCoA) was the fetal type, we planned anastomosis of the occipital artery to the P4 portion of the PCA followed by endovascular obliteration of the parent artery including the aneurysms...
October 2016: NMC Case Rep J
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