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Acta Neurochirurgica

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https://www.readbyqxmd.com/read/28710522/cta-analysis-and-assessment-of-morphological-factors-related-to-rupture-in-413-posterior-communicating-artery-aneurysms
#1
Justiina Huhtakangas, Martin Lehecka, Hanna Lehto, Behnam Rezai Jahromi, Mika Niemelä, Riku Kivisaari
Posterior communicating artery (PcomA) aneurysms are frequently encountered, but there are few publications on their morphology. A growing number of aneurysms are incidental findings, which makes evaluation of rupture risk important. Our goal was to identify morphological features and anatomical variants associated with PComA aneurysms and to assess parameters related to rupture. We studied CT angiographies of 391 consecutive patients treated between 2000 and 2014 at a single institution. We determined clinically important morphological parameters and performed univariate and multivariate analysis...
July 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28702813/dynamic-factors-involved-in-common-peroneal-nerve-entrapment-neuropathy
#2
Takao Kitamura, Kyongsong Kim, Daijiro Morimoto, Rinko Kokubo, Naotaka Iwamoto, Toyohiko Isu, Akio Morita
BACKGROUND: Common peroneal nerve (CPN) entrapment neuropathy (CPNEN) is the most common peripheral neuropathy of the lower extremities. The pathological mechanisms underlying CPNEN remain unclear. We sought to identify dynamic factors involved in CPNEN by directly measuring the CPN pressure during stepwise CPNEN surgery. METHODS: We enrolled seven patients whose CPNEN improved significantly after CPN neurolysis. All suffered intermittent claudication, and the repetitive plantar flexion test, used as a CPNEN provocation test, was positive...
July 12, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28699067/intraoperative-clinical-testing-overestimates-the-therapeutic-window-of-the-permanent-dbs-electrode-in-the-subthalamic-nucleus
#3
Josefine Blume, J Schlaier, E Rothenfußer, J Anthofer, F Zeman, A Brawanski, U Bogdahn, M Lange
BACKGROUND: Intraoperative test stimulation is established to optimize target localization in STN DBS, but requires a time-consuming awake surgery in off-medication state. The aim of this study was to compare the thresholds of stimulation-induced effects of test stimulation and the permanent electrode. METHODS: Fifty-nine PD patients receiving bilateral STN DBS were clinically examined with stepwise increasing monopolar stimulation during surgery and DBS programming at matched stimulation depths...
July 12, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28699066/effect-comparisons-among-treatment-measures-on-progression-free-survival-in-patients-with-skull-base-chordomas-a-retrospective-study-of-234-post-surgical-cases
#4
Liang Wang, Kaibing Tian, Junpeng Ma, Ke Wang, Guijun Jia, Zhen Wu, Liwei Zhang, Junting Zhang
BACKGROUND: Skull base chordoma (SBC) is a rare and refractory tumor with a high rate of relapse. We aimed to investigate the relationships between different treatment measures and progression-free survival (PFS) outcomes. METHODS: Data from 234 SBC patients from one institution were retrieved from a prospectively maintained database. After grouping, the clinicopathological features and mean estimated PFS times were subject to inter-group and intra-group comparisons, and prognostic factors of PFS were estimated by statistical analyses...
July 11, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28695447/regional-differences-in-the-incidence-of-aneurysmal-subarachnoid-haemorrhage-in-finland
#5
Iiro Jalava, Liisa Pyysalo, Mikko Alanen, Oona Snicker, Juha Öhman, Antti Ronkainen
BACKGROUND: Over the years, the consensus has generally been that Finland is a country with a significantly high incidence of aneurysmal subarachnoid haemorrhage (SAH) when compared to the rest of the world, excluding Japan. Most of the traditionally cited Finnish incidence studies are several decades old and have clear differences in their methodology and study design. The objective of this study was to determine the hospital-admitted incidence of aneurysmal SAH at Tampere University Hospital between 1990 and 2014...
July 11, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28695446/intra-catheter-endoscopy-for-various-shunting-procedures-a-retrospective-analysis-on-surgical-practicability-catheter-placement-and-failure-rates
#6
Sebastian Antes, Stefan Linsler, Mohamed Salah, Sebastian Senger, Joachim Oertel
BACKGROUND: The long-term function of a cerebral shunt is directly influenced by the placement of the ventricle catheter. In this work, an intra-luminal endoscope for best possible catheter positioning was used. Practicability, postoperative imaging, and shunt failure rates were retrospectively evaluated. METHODS: Between January 2012 and June 2016, an intra-catheter endoscope was applied in 71 procedures. Endoscopic technique was used for catheter placement in first-time shunting or cerebrospinal fluid reservoir insertion (n = 38), revision surgery in proximal shunt failure (n = 13), and various intraventricular stenting procedures (n = 20)...
July 10, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28691137/effective-use-of-balloon-guide-catheters-in-reducing-incidence-of-mechanical-thrombectomy-related-distal-embolization
#7
Dong Hoon Lee, Jae Hoon Sung, Sang Uk Kim, Ho Jun Yi, Jae Taek Hong, Sang Won Lee
BACKGROUND AND PURPOSE: The clinical benefit of endovascular stroke therapy has been demonstrated in several prospective randomized trials. However, in a relevant percentage of patients, mechanical thrombectomy bears the risk of causing new infarction in initially unaffected vascular territories through thrombus fragmentation and migration of clot debris. The goal of this study was to evaluate the use of the balloon guide catheter (BGC) to effectively achieve flow arrest and thrombus aspiration during the intervention to avoid distal embolization...
July 9, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28689341/painful-spasms-in-facial-masticatory-and-motor-ocular-muscles-reversed-after-microvascular-decompression-of-a-neurovascular-conflict-at-brainstem
#8
Tania-Mihaela Idriceanu, Marc Sindou
The authors present a case of a 42-year-old female admitted for disabling complex and atypical bilateral facial spasms associated with painful masticatory and motor ocular dystonic movements, difficult to fit in the definition of any known cranio-facial dyskinesias. MRI showed a left PICA loop invaginated into the brainstem, considered responsible of an hyperactive disorder of the brainstem nuclei neighboring the conflict. After microvascular decompression, the patient made a full recovery with complete disappearance of the paroxystic phenomena...
July 8, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28688051/transtubular-excisional-biopsy-as-a-rescue-for-a-non-diagnostic-stereotactic-needle-biopsy-case-report-and-literature-review
#9
Yu-Ning Chen, Sacit Bulent Omay, Sathwik R Shetty, Buqing Liang, João Paulo Almeida, Armando S Ruiz-Treviño, Ehud Lavi, Theodore H Schwartz
Stereotactic needle biopsy, a standard of care for acquiring deep-seated pathology, has limitations and risks in some situations. We present an uncommon case with basal ganglia dematiaceous mycetoma. Due to the firm consistency of the lesion, the initial stereotactic needle biopsy failed to provide a diagnosis. In a second operation, transtubular excisional biopsy was successfully performed to remove the entire mycetoma. We reviewed recent case series of transtubular approaches to deep-seated brain lesions and suggest this method could be a rescue for a non-diagnostic stereotactic needle biopsy and even may be the approach of choice in some cases...
July 7, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28681273/delayed-symptomatic-haemorrhage-from-the-remnants-of-a-thalamic-arteriovenous-malformation-after-previous-angiographic-cure-with-radiotherapy
#10
Paulina Majewska, Alpha Tsui, Alexios A Adamides
In 1995 a 16-year old girl was diagnosed with a large left thalamic AVM that was considered unsuitable for microsurgical resection and was treated with radiotherapy twice, which led to angiographic cure. She re-presented 19 years after initial treatment with a symptomatic acute thalamic haemorrhage. Her digital subtraction angiography was negative for arterio-venous shunting. MRI/MRA showed cystic change with adjacent contrast enhancement in the region of the previously irradiated arteriovenous malformation...
July 5, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28676892/methodology-outcome-safety-and-in-vivo-accuracy-in-traditional-frame-based-stereoelectroencephalography
#11
Lars E van der Loo, Olaf E M G Schijns, Govert Hoogland, Albert J Colon, G Louis Wagner, Jim T A Dings, Pieter L Kubben
BACKGROUND: Stereoelectroencephalography (SEEG) is an established diagnostic technique for the localization of the epileptogenic zone in drug-resistant epilepsy. In vivo accuracy of SEEG electrode positioning is of paramount importance since higher accuracy may lead to more precise resective surgery, better seizure outcome and reduction of complications. OBJECTIVE: To describe experiences with the SEEG technique in our comprehensive epilepsy center, to illustrate surgical methodology, to evaluate in vivo application accuracy and to consider the diagnostic yield of SEEG implantations...
July 5, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28674732/preservation-of-hearing-following-awake-surgery-via-the-retrosigmoid-approach-for-vestibular-schwannomas-in-eight-consecutive-patients
#12
Nobusada Shinoura, Akira Midorikawa, Kentaro Hiromitsu, Shoko Saito, Ryoji Yamada
BACKGROUND: Hearing preservation in patients with vestibular schwannomas remains difficult by microsurgery or radiosurgery. METHOD: In this study, awake surgery via the retrosigmoid approach was performed for vestibular schwannomas (volume, 11.6 ± 11.2 ml; range, 1.3-26.4 ml) in eight consecutive patients with preoperative quartering of pure tone audiometry (PTA) of 53 ± 27 dB. RESULTS: After surgery, hearing was preserved in seven patients and improved in one patient...
July 3, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28674731/tractography-guides-the-approach-for-resection-of-thalamopeduncular-tumors
#13
Ryan Foley, Frederick Boop
BACKGROUND: Thalamopeduncular tumors arise at the junction of the inferior thalamus and cerebral peduncle, and present with a common clinical syndrome of progressive spastic hemiparesis. METHOD: Formal preoperative magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) were performed. Postoperative MRI was obtained to evaluate the extent of tumor resection. A prospective analysis of clinical outcomes was then conducted by the senior author. CONCLUSIONS: Preoperative tractography is a useful adjunct to surgical planning in tumors that displace motor pathways...
July 3, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28660396/resolution-of-traumatic-vertebral-artery-dissection-and-occlusion-after-repositioning-and-posterior-c1-ring-osteosynthesis-of-a-displaced-jefferson-burst-fracture
#14
Andy Ottenbacher, Martin Bettag
A 70-year-old male sustained a Jefferson burst fracture with unilateral vertebral artery dissection and occlusion by displaced fragments. We performed reduction and posterior C1-ring osteosynthesis. We present a description of the intraoperative manual assessment of atlantoaxial stability. The vertebral artery was found with a good anterograde flow posteroperatively, and MRA showed reperfusion of the vessel. The patient was free of pain with preserved C1-C2 rotation after 6 weeks. Function-preserving posterior C1-ring osteosynthesis after reduction in a displaced Jefferson burst fracture complicated by vertebral artery dissection and occlusion may restore blood flow...
June 29, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28660395/comparison-of-anti-siphon-devices-how-do-they-affect-csf-dynamics-in-supine-and-upright-posture
#15
Manuel Gehlen, Anders Eklund, Vartan Kurtcuoglu, Jan Malm, Marianne Schmid Daners
BACKGROUND: Three different types of anti-siphon devices (ASDs) have been developed to counteract siphoning-induced overdrainage in upright posture. However, it is not known how the different ASDs affect CSF dynamics under the complex pressure environment seen in clinic due to postural changes. We investigated which ASDs can avoid overdrainage in upright posture best without leading to CSF accumulation. METHODS: Three shunts each of the types Codman Hakim with SiphonGuard (flow-regulated), Miethke miniNAV with proSA (gravitational), and Medtronic Delta (membrane controlled) were tested...
June 28, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28660394/optic-chiasm-distortions-in-craniopharyngiomas-a-sign-of-hypothalamic-involvement
#16
LETTER
Ruth Prieto, José M Pascual, Laura Barrios
No abstract text is available yet for this article.
June 28, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28647798/a-new-model-for-biofilm-formation-and-inflammatory-tissue-reaction-intraoperative-infection-of-a-cranial-implant-with-staphylococcus-aureus-in-rats
#17
Silke Glage, Silke Paret, Andreas Winkel, Meike Stiesch, André Bleich, Joachim K Krauss, Kerstin Schwabe
BACKGROUND: Implant failure is a severe and frequent adverse event in all areas of neurosurgery. It often involves infection with biofilm formation, accompanied by inflammation of surrounding tissue, including the brain, and bone loss. The most common bacteria involved are Staphylococcus aureus. We here test whether intraoperative infection of intracranial screws with Staphylococcus aureus would lead to biofilm formation and inflammatory tissue reaction in rats. METHODS: Two titanium screws were implanted in the cranium of Sprague-Dawley rats, anesthetized with xylazine (4 mg/kg) and ketamine (75 mg/kg)...
June 25, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28647797/overdrainage-of-cerebrospinal-fluid-and-hydrocephalus-shunts
#18
EDITORIAL
Marek Czosnyka, Zofia H Czosnyka
No abstract text is available yet for this article.
June 25, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28647796/large-suprasellar-craniopharyngioma-surgery-in-adults-through-the-trans-eyebrow-supraorbital-approach
#19
LETTER
Ricardo Prat-Acín, Inma Galeano, Rocío Evangelista, Giovanni Pancucci, Juliana Guarín, Angel Ayuso-Sacido, Mukesh Misra
No abstract text is available yet for this article.
June 24, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28646465/delayed-complications-of-deep-brain-stimulation-16-year-experience-in-249-patients
#20
Gustavo Fernández-Pajarín, A Sesar, B Ares, J L Relova, E Arán, M Gelabert-González, A Castro
BACKGROUND: Over the years, most of the deep brain stimulation (DBS) complications described have been mainly related to the surgery itself or the stimulation. Only a few authors have dealt with chronic complications or complications due to implanted material. METHODS: We retrospectively analyzed complications beyond the 1st month after surgery in 249 patients undergoing DBS at our site for 16 years, with 321 interventions overall. RESULTS: Our results show that infection is the most frequent delayed complication (12...
June 24, 2017: Acta Neurochirurgica
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