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Stereotactic and Functional Neurosurgery

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https://www.readbyqxmd.com/read/28531896/gamma-knife-radiosurgery-for-vestibular-schwannomas-and-quality-of-life-evaluation
#1
Oren Berkowitz, Yueh-Ying Han, Evelyn O Talbott, Aditya K Iyer, Hideyuki Kano, Douglas Kondziolka, Mason A Brown, L Dade Lunsford
BACKGROUND: Further investigation is needed to look at the impact of vestibular schwannoma (VS) on the health-related quality of life (QOL) of participants who undergo Gamma Knife® radiosurgery (GKRS). OBJECTIVES: Investigators compared the QOL for VS participants to reported US population norms in order to evaluate disease burden and long-term QOL several years after GKRS. METHODS: This cross-sectional study surveyed participants to assess hearing status, tinnitus, imbalance, vertigo, as well as the Short-Form 36-item Health Questionnaire (SF-36)...
May 23, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28501876/stereotactic-radiosurgery-as-initial-surgical-management-for-elderly-patients-with-trigeminal-neuralgia
#2
Jonathan Cohen, Seyed H Mousavi, Amir H Faraji, Berkcan Akpinar, Edward A Monaco, John C Flickinger, Ajay Niranjan, L Dade Lunsford
BACKGROUND: Management of older patients with medically refractory trigeminal neuralgia (TN) is yet a matter of debate. OBJECTIVE: We sought to determine the benefit of stereotactic radiosurgery (SRS) as the sole surgical management in older patients (≥70 years). METHODS: One hundred and twenty-seven patients (≥70 years) with typical TN underwent SRS as initial surgical management. The median maximum dose for the first procedure was 80 Gy...
May 13, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28501875/five-year-neuropsychological-outcome-after-stereotactic-radiofrequency-amygdalohippocampectomy-for-mesial-temporal-lobe-epilepsy-longitudinal-study
#3
Lenka Krámská, Zdeněk Vojtěch, Jiří Lukavský, Michaela Stará, Hana Malíková
PURPOSE: To assess the neuropsychological performance recoded over a period of 5 years after stereotactic radiofrequency amygdalohippocampectomy (SAHE) in the treatment of mesial temporal lobe epilepsy. MATERIAL AND METHODS: Thirty patients (mean age 38 years, 14 females/16 males) were included in this study. Twenty-one patients were treated on the left side, 9 on the right. Patients underwent neuropsychological evaluation by the Wechsler Adult Intelligence Scale-Revised and the Wechsler Memory Scale-Revised preoperatively and 5 years after SAHE...
May 13, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28486221/evaluation-of-clinical-application-and-dosimetric-comparison-of-treatment-plans-of-gamma-knife-and-cyberknife-in-treating-arteriovenous-malformations
#4
Chun-Yuan Kuo, Yi-Chieh Tsai, An-Cheng Shiau, Hao-Wen Cheng, Hsiao-Wei Yu, Yu-Kai Su, Jo-Ting Tsai
PURPOSE: To analyze and compare the characteristics of dose distributions for Leksell Gamma Knife Perfexion (LGK-PFX) and CyberKnife (CK) in treating arteriovenous malformations (AVMs). SUBJECTS AND METHODS: Twenty-four patients with AVMs who received CK radiosurgery at a prescribed dose (PD) of 16-25 Gy in a single fraction were selected. A LGK-PFX treatment plan with the same PD was designed for each patient. Dosimetric values for both systems were compared with respect to the conformity index (CI); selectivity index (SI); gradient index (GI) of 75, 50, and 25% of the PD; heterogeneity index; volume of the brain tissue covered by doses of 10 and 12 Gy; maximum dose delivered to the brainstem; and beam-on time...
May 10, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28433987/radiofrequency-lesions-through-deep-brain-stimulation-electrodes-in-movement-disorders-case-report-and-review-of-the-literature
#5
Javier Pérez-Suárez, Cristina V Torres Díaz, Lydia López Manzanares, Marta Navas García, Jesús Pastor, Patricia Barrio Fernández, Rafael G de Sola
BACKGROUND: Although there are few reports of radiofrequency lesions performed through deep brain stimulation (DBS) electrodes in patients with movement disorders, experience with this method is scarce. METHODS: We present 2 patients who had been previously treated with DBS of subthalamic nuclei (STN) and the ventral intermediate (VIM) nucleus of the thalamus for Parkinson's disease and essential tremor, respectively, and underwent a radiofrequency lesion through their DBS electrodes after developing a hardware infection...
April 22, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28434004/what-do-medical-students-know-about-deep-brain-stimulation
#6
Andreas Wloch, Assel Saryyeva, Hans E Heissler, Christoph Schrader, H Holger Capelle, Joachim K Krauss
BACKGROUND: Deep brain stimulation (DBS) is an established therapy for movement disorders. It is currently under investigation in neuropsychiatric disorders. Neurophobia is a common phenomenon that might have a negative impact in medical education. Little is known about medical students' knowledge about DBS when they enter university and what they learn about it during their medical formation. METHODS: A 10-item questionnaire was designed. Questions addressed indications for DBS, costs of DBS, complications, the percentage of Parkinson disease (PD) patients who might profit from DBS, etc...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28395278/cost-of-deep-brain-stimulation-infection-resulting-in-explantation
#7
Tsinsue Chen, Zaman Mirzadeh, Margaret Lambert, Omar Gonzalez, Ana Moran, Andrew G Shetter, Francisco A Ponce
BACKGROUND: Deep brain stimulation (DBS) hardware infection is a serious complication, often resulting in multiple hardware salvage attempts, hospitalizations, and long-term antibiotic therapy. OBJECTIVES: We aimed to quantify the costs of DBS hardware-related infections in patients undergoing eventual device explantation. METHODS: Of 362 patients who underwent 530 electrode placements (1 January 2010 to 30 December 2014), 16 (4.4%) had at least 2 hardware salvage procedures...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28334712/deep-brain-stimulation-for-the-treatment-of-aggressive-behaviour-considerations-on-pathophysiology-and-target-choice
#8
Michele Rizzi, Carlo Efisio Marras
No abstract text is available yet for this article.
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28324881/optic-radiation-tractography-and-visual-field-deficits-in-laser-interstitial-thermal-therapy-for-amygdalohippocampectomy-in-patients-with-mesial-temporal-lobe-epilepsy
#9
Dali Yin, John A Thompson, Cornelia Drees, Steven G Ojemann, Lidia Nagae, Victoria S Pelak, Aviva Abosch
BACKGROUND/AIMS: Laser interstitial thermal therapy (LITT) has become an alternative to open-resective surgery for refractory mesial temporal lobe epilepsy (MTLE). Occurrence of visual field defects (VFDs) following open surgery for MTLE is reported at 52-100%. We examined the rate of VFDs following LITT for amygdalohippocampectomy (AHE) and correlated the occurrence of VFDs with damage to the optic radiations, assessed by diffusion tensor tractography (DTI). METHODS: We performed a retrospective analysis of 5 patients who underwent LITT-AHE for medically refractory MTLE...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28297702/long-term-effective-thalamic-deep-brain-stimulation-for-neuropathic-tremor-in-two-patients-with-charcot-marie-tooth-disease
#10
Lidia Cabañes-Martínez, Marta Del Álamo de Pedro, Gema de Blas Beorlegui, Ignacio Regidor Bailly-Bailliere
BACKGROUND: It has been described that many Charcot-Marie-Tooth syndrome type 2 patients are affected by a very disabling type of tremor syndrome, the pathophysiology of which remains unclear. Deep brain stimulation (DBS) has been successfully applied to treat most types of tremors by implanting electrodes in the ventral intermediate nucleus of the thalamus (Vim). METHODS: We used DBS applied to the Vim in 2 patients with severe axonal inherited polyneuropathies who developed a disabling tremor...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28259880/modified-fluorodeoxyglucose-metabolism-in-motor-circuitry-by-subthalamic-deep-brain-stimulation
#11
Chunyan Cao, Huiwei Zhang, Dianyou Li, Shikun Zhan, Jing Zhang, Xiaoxiao Zhang, Chuantao Zuo, Bomin Sun
BACKGROUND: Adjustment of the motor circuitry has been described in the treatment of Parkinson disease (PD). OBJECTIVES: To evaluate the modulation of the motor circuitry of PD patients by subthalamic deep brain stimulation (STN DBS) using 18F-fluorodeoxyglucose (FDG) and positron emission tomography (PET). METHODS: Resting-state brain 18F-FDG PET imaging was performed for 8 PD patients before surgery and also 1 year after STN DBS treatment; changes in regional glucose metabolism were identified...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28249263/erratum
#12
(no author information available yet)
No abstract text is available yet for this article.
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28208150/acute-and-subacute-presentations-of-cerebral-edema-following-deep-brain-stimulation-lead-implantation
#13
Albert J Fenoy, Sebastian J Villarreal, Mya C Schiess
BACKGROUND/AIMS: Postoperative cerebral edema around a deep brain stimulation (DBS) electrode is an uncommon reported complication. The goal of this study was to identify instances of postoperative edema based on clinical presentation, and to remark on their management. METHODS: A retrospective chart review was performed on all patients who underwent DBS electrode implantation over a 3-year period. Routine CT imaging on postoperative day (POD) 1 was negative. Patients were identified based on clinical neurological changes, leading to imaging and subsequent diagnosis...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28199998/delayed-intraparenchymal-and-intraventricular-hemorrhage-requiring-surgical-evacuation-after-mri-guided-laser-interstitial-thermal-therapy-for-lesional-epilepsy
#14
Sean M Barber, Luke Tomycz, Timothy George, Dave F Clarke, Mark Lee
BACKGROUND: Symptomatic intracranial hemorrhage is a rare complication of laser interstitial thermal therapy (LITT). OBJECTIVES: To present a unique case of delayed symptomatic intracranial hemorrhage occurring after a LITT procedure for epilepsy in a high-volume center (68 LITT procedures for pediatric epilepsy have been performed). METHODS: An 18-year-old male with epilepsy underwent LITT to an area of heterotopia near the right lateral ventricle...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28199993/intraoperative-thresholds-for-capsular-stimulation-are-reliable-for-chronic-pallidal-deep-brain-stimulation-in-dystonia
#15
René Reese, Martin M Reich, Daniela Falk, Günther Deuschl, H Maximilian Mehdorn, Jens Volkmann
BACKGROUND: The threshold current for inducing muscle contractions by stimulation of pyramidal tract fibres adjacent to the globus pallidus internus (GPi) is, besides microelectrode recordings for the determination of nuclear boundaries, currently the only neurophysiological marker for intraoperative refinement of the anatomically planned target point for pallidal deep brain stimulation (GPi-DBS) in dystonia. OBJECTIVES: To determine the relationship between intraoperative thresholds for muscle contractions under general anaesthesia and postoperative thresholds in GPi-DBS...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28135704/implementation-of-a-new-upmc-gamma-knife-radiosurgery-quality-assurance-registry
#16
Ajay Niranjan, Denise Layne, Mark Briercheck, Svetlana Trofimova, Edward A Monaco Iii, Hideyuki Kano, L Dade Lunsford
OBJECT: In this report, we discuss the development of a new, comprehensive, Health Insurance Portability and Accountability Act-compliant electronic quality assurance (QA) registry for Gamma Knife (GK) radiosurgery patients. This registry can be used to query outcomes, link with current hospital electronic medical records, and share data with future corporate or national professional society registries under development. METHODS: A clinical task force comprising physicians and regulatory, legal, and information technology (IT) experts was created to define the nomenclature, regulatory requirements, hosting site, and required capabilities of the proposed system...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28132063/magnetic-resonance-imaging-guided-transplantation-of-neural-stem-cells-into-the-porcine-spinal-cord
#17
Jason J Lamanna, Lindsey N Urquia, Carl V Hurtig, Juanmarco Gutierrez, Cody Anderson, Pete Piferi, Thais Federici, John N Oshinski, Nicholas M Boulis
BACKGROUND: Cell-based therapies are a promising treatment option for traumatic, tumorigenic and degenerative diseases of the spinal cord. Transplantation into the spinal cord is achieved with intravascular, intrathecal, or direct intraparenchymal injection. The current standard for direct injection is limited by surgical invasiveness, difficulty in reinjection, and the inability to directly target anatomical or pathological landmarks. The objective of this study was to present the proof of principle for minimally invasive, percutaneous transplantation of stem cells into the spinal cord parenchyma of live minipigs under MR guidance...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28132061/the-effects-of-dexmedetomidine-on-microelectrode-recordings-of-the-subthalamic-nucleus-during-deep-brain-stimulation-surgery-a-retrospective-analysis
#18
Letha Mathews, Corrie R Camalier, Koffi M Kla, Martina D Mitchell, Peter E Konrad, Joseph S Neimat, Kenneth G Smithson
BACKGROUND: The placement of subthalamic nucleus (STN) deep brain stimulation (DBS) electrodes can be facilitated by intraoperative microelectrode recording (MER) of the STN. OBJECTIVES: Optimal anesthetic management during surgery remains unclear because of a lack of quantitative data of the effect of anesthetics on MER. Therefore, we measured the effects of dexmedetomidine (DEX) on MER measures of the STN commonly taken intraoperatively. METHODS: MER from 45 patients was retrospectively compared between patients treated with remifentanil (REMI) alone or both REMI and DEX, which are the 2 main standards of care at our center...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28088808/shunt-surgery-in-idiopathic-intracranial-hypertension-aided-by-electromagnetic-navigation
#19
Elvis J Hermann, Manolis Polemikos, Hans E Heissler, Joachim K Krauss
BACKGROUND: Idiopathic intracranial hypertension (IIH) is characterized by increased cerebrospinal fluid (CSF) pressure and normal or slit ventricles. Lumboperitoneal shunting had been favored by many investigators for CSF diversion in IIH for decades; however, it has been associated with various side effects. Because of the small ventricular size adequate positioning of a ventricular catheter is challenging. OBJECTIVES: Here, we investigated the usefulness of electromagnetic (EM)-guided ventricular catheter placement for ventriculoperitoneal shunting in IIH...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28088805/a-retrospective-analysis-of-stereoelectroencephalography-and-subdural-electroencephalography-for-preoperative-evaluation-of-intractable-epilepsy
#20
Meihua Yang, Yuanshi Ma, Wei Li, Xianjun Shi, Zhi Hou, Ning An, Chunqing Zhang, Lihong Liu, Hui Yang, Dong Zhang, Shiyong Liu
BACKGROUND: Different methods for intracranial electrode recording have various advantages and disadvantages, and controversy exists regarding the complications of stereoelectroencephalography (SEEG) and subdural EEG. OBJECTIVE: The purpose of this study was to determine the efficacy and safety of SEEG by comparing it with subdural EEG. METHODS: Data from 100 patients who underwent SEEG (n = 48) and subdural EEG (n = 52) to evaluate the epileptogenic zone were collected from June 2011 to June 2015...
2017: Stereotactic and Functional Neurosurgery
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