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Mri and epilepsy

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https://www.readbyqxmd.com/read/29782369/neuroimaging-in-epilepsy
#1
Meneka Kaur Sidhu, John S Duncan, Josemir W Sander
PURPOSE OF REVIEW: Epilepsy neuroimaging is important for detecting the seizure onset zone, predicting and preventing deficits from surgery and illuminating mechanisms of epileptogenesis. An aspiration is to integrate imaging and genetic biomarkers to enable personalized epilepsy treatments. RECENT FINDINGS: The ability to detect lesions, particularly focal cortical dysplasia and hippocampal sclerosis, is increased using ultra high-field imaging and postprocessing techniques such as automated volumetry, T2 relaxometry, voxel-based morphometry and surface-based techniques...
May 17, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29777895/asymmetry-of-cerebral-peduncles-for-predicting-motor-function-restoration-in-young-patients-before-hemispherectomy
#2
Xiu-Yu Du, Si-Chang Chen, Yu-Guang Guan, Jing-Jing Gu, Meng Zhao, Tian-Fu Li, Jun-Hong Pan, Guo-Ming Luan
OBJECTIVE: Hemispherectomy has been successfully used for medically intractable epilepsy patients. However, it is difficult to predict postoperative motor function. The aim of the present study was to analyze whether the preoperative asymmetry of cerebral peduncles could be used to predict motor function restoration before hemispherectomy for young patients with medically intractable epilepsy. METHODS: The clinical record and MRI data of 53 patients were retrospectively analyzed...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29766384/increased-functional-meg-connectivity-as-a-hallmark-of-mri-negative-focal-and-generalized-epilepsy
#3
Yiwen Li Hegner, Justus Marquetand, Adham Elshahabi, Silke Klamer, Holger Lerche, Christoph Braun, Niels K Focke
Epilepsy is one of the most prevalent neurological diseases with a high morbidity. Accumulating evidence has shown that epilepsy is an archetypical neural network disorder. Here we developed a non-invasive cortical functional connectivity analysis based on magnetoencephalography (MEG) to assess commonalities and differences in the network phenotype in different epilepsy syndromes (non-lesional/cryptogenic focal and idiopathic/genetic generalized epilepsy). Thirty-seven epilepsy patients with normal structural brain anatomy underwent a 30-min resting state MEG measurement with eyes closed...
May 15, 2018: Brain Topography
https://www.readbyqxmd.com/read/29761118/susceptibility-weighted-and-diffusion-kurtosis-imaging-to-evaluate-encephalomalacia-with-epilepsy-after-traumatic-brain-injury
#4
Wenbin Li, Xuan Wang, Xiaoer Wei, Mingliang Wang
Objective: Encephalomalacia after traumatic brain injury (TBI) is one of the factors leading to epilepsy. In this study, magnetic resonance imaging (MRI) was used to explore the brain image features of epilepsy after traumatic encephalomalacia, and to provide objective evidence for predicting the possible occurrence of epilepsy after traumatic encephalomalacia. Methods: Two-hundred-fifty-two patients with traumatic encephalomalacia were prospectively enrolled in the study...
May 2018: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29753575/quantitative-apparent-diffusion-coefficient-mapping-may-predict-seizure-onset-in-children-with-sturge-weber-syndrome
#5
Anna L R Pinto, Yangming Ou, Mustafa Sahin, P Ellen Grant
BACKGROUND: Sturge-Weber syndrome (SWS) is often accompanied by seizures, stroke-like episodes, hemiparesis, and visual field deficits. This study aimed to identify early pathophysiologic changes that exist before the development of clinical symptoms and to evaluate if the apparent diffusion coefficient (ADC) map is a candidate early biomarker of seizure risk in patients with SWS. METHODS: This is a prospective cross-sectional study using quantitative ADC analysis to predict onset of epilepsy...
April 12, 2018: Pediatric Neurology
https://www.readbyqxmd.com/read/29752488/open-resection-of-hypothalamic-hamartomas-for-intractable-epilepsy-revisited-using-intraoperative-mri
#6
Libby van Tonder, Sasha Burn, Anand Iyer, Jo Blair, Mohammed Didi, Michael Carter, Timothy Martland, Conor Mallucci
INTRODUCTION: Hypothalamic hamartomas (HHs) are rare non-neoplastic lesions which cause drug-resistant epilepsy with associated behavioural, psychiatric and endocrine issues. With the development of new minimally invasive techniques for the treatment of HH, there is a need to reappraise the effectiveness and safety of each approach. We review the outcomes of HH patients treated surgically, utilizing intraoperative magnetic resonance imaging (IOMRI), by a team of Alder Hey NHS Foundation Trust tumour and epilepsy neurosurgeons since 2011...
May 11, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29751364/ictal-and-interictal-electric-source-imaging-in-presurgical-evaluation-a-prospective-study
#7
Praveen Sharma, Michael Scherg, Lars H Pinborg, Martin Fabricius, Guido Rubboli, Birthe Pedersen, Anne-Mette Leffers, Peter Uldall, Bo Jespersen, Jannick Brennum, Otto Mølby Henriksen, Sándor Beniczky
BACKGROUND: Accurate localization of the epileptic focus is essential for surgical treatment of patients with drug- resistant epilepsy. EEG source imaging (ESI) is increasingly used in presurgical evaluation. However, most previous studies analysed interictal discharges. Prospective studies comparing feasibility and accuracy of interictal (II) and ictal (IC) ESI are lacking. METHODS: We prospectively analysed long-term video EEG recordings (LTM) of patients admitted for presurgical evaluation...
May 11, 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29751184/usefulness-of-ultrasound-guided-microsurgery-in-cavernous-angiomas-removal
#8
Lina Raffaella Barzaghi, Jody Filippo Capitanio, Lodoviga Giudice, Pietro Panni, Stefania Acerno, Pietro Mortini
OBJECT: Primary steps in the cavernous angiomas (CAs) surgery are a precise lesion identification and an optimal trajectory definition. Doing so, navigation techniques allow better results compared to microsurgery alone. In this paper we define the benefits of Intra-Operative Ultra-Sound (IOUS) use in addition to standard localization systems. METHODS: We retrospectively analyzed 59 CAs comparing two groups: 34 cases of frame-based and frameless navigation-assisted microsurgery (no-IOUS group) versus 25 cases of IOUS-guided microsurgery associated with these techniques (IOUS group)...
May 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29750339/pre-and-postsurgical-cognitive-trajectories-and-quantitative-mri-changes-in-rasmussen-syndrome
#9
Sarah R Rudebeck, Sara Shavel-Jessop, Sophia Varadkar, Tamsin Owen, J Helen Cross, Faraneh Vargha-Khadem, Torsten Baldeweg
OBJECTIVE: To quantify the longitudinal cognitive trajectory, before and after surgery, of Rasmussen syndrome (RS), a rare disease characterized by focal epilepsy and progressive atrophy of one cerebral hemisphere. METHOD: Thirty-two patients (mean age = 6.7 years; 17 male, 16 left hemispheres affected) were identified from hospital records. The changes in intelligence scores during 2 important phases in the patients' journey to treatment were investigated: (1) during the preoperative period (n = 28, mean follow-up 3...
May 11, 2018: Epilepsia
https://www.readbyqxmd.com/read/29746391/magnetoencephalographic-mapping-of-epileptic-spike-population-using-distributed-source-analysis-comparison-with-intracranial-electroencephalographic-spikes
#10
Naoaki Tanaka, Christos Papadelis, Eleonora Tamilia, Joseph R Madsen, Phillip L Pearl, Steven M Stufflebeam
INTRODUCTION: This study evaluates magnetoencephalographic (MEG) spike population as compared with intracranial electroencephalographic (IEEG) spikes using a quantitative method based on distributed source analysis. METHODS: We retrospectively studied eight patients with medically intractable epilepsy who had an MEG and subsequent IEEG monitoring. Fifty MEG spikes were analyzed in each patient using minimum norm estimate. For individual spikes, each vertex in the source space was considered activated when its source amplitude at the peak latency was higher than a threshold, which was set at 50% of the maximum amplitude over all vertices...
April 27, 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29738985/single-center-long-term-results-of-vagus-nerve-stimulation-for-epilepsy-a-10-17-year-follow-up-study
#11
Jan Chrastina, Zdeněk Novák, Tomáš Zeman, Jitka Kočvarová, Martin Pail, Irena Doležalová, Jiří Jarkovský, Milan Brázdil
PURPOSE: The paper presents a long-term follow-up study of VNS patients, analyzing seizure outcome, medication changes, and surgical problems. METHOD: 74 adults with VNS for 10 to 17 years were evaluated yearly as: non-responder - NR (seizure frequency reduction <50%), responder - R (reduction ≥ 50% and <90%), and 90% responder - 90R (reduction ≥ 90%). Delayed R or 90R (≥ 4 years after surgery), patients with antiepileptic medication changes and battery or complete system replacement were identified...
April 30, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29738718/bilateral-thalamocortical-abnormalities-in-focal-cortical-dysplasia
#12
Arthur Rezayev, Henry A Feldman, Jacob Levman, Emi Takahashi
BACKGROUND AND PURPOSE: Focal cortical dysplasia (FCD), a congenital malformation of the neocortex and one of the most common causes of medication resistant epilepsy in pediatric populations, can be studied noninvasively by diffusion tensor imaging (DTI). The present study aimed to quantify changes in the thalamus and thalamocortical pathways with respect to fractional anisotropy (FA), apparent diffusion coefficient (ADC), volume, and other common measures. MATERIALS & METHODS: The study quantified data collected from pediatric patients with a prior diagnosis of FCD; 75 patients (35 females, 10...
May 5, 2018: Brain Research
https://www.readbyqxmd.com/read/29736224/prognostic-value-of-ictal-onset-patterns-in-postsurgical-outcome-of-temporal-lobe-epilepsy
#13
Jafar Mehvari-Habibabadi, Reza Basiratnia, Houshang Moein, Mohamad Zare, Majid Barakatain, Yahya Aghakhani, Nasim Tabrizi
Background: To investigate ictal onset patterns (IOP) in scalp electroencephalography (EEG) of patients with temporal lobe epilepsy (TLE) and their prognostic effect on the postoperative outcome. Methods: We conducted a retrospective cohort study between 2011 and 2015 in our referral Epilepsy Surgery Center enrolling adult patients with refractory TLE and a visible epileptogenic lesion in magnetic resonance imaging (MRI), who underwent epilepsy surgery. Demographic, clinical and MRI findings were collected and ictal findings during video-EEG monitoring were reviewed in detail...
October 7, 2017: Iranian Journal of Neurology
https://www.readbyqxmd.com/read/29733410/perioperative-multimodal-evaluation-and-surgical-tactics-of-tumor-related-epilepsy-2-dimensional-operative-video
#14
Chengxin Ma, Rui Feng, N U Farrukh Hameed, Jie Zhang, Dongxiao Zhuang, Jinsong Wu
Treatment of tumor-related epilepsy (TRE), especially for tumors near critical areas, requires surgeons to strike a balance between the epileptic benefit and functional outcome after surgery. Here, we present a case in which multimodal evaluation facilitated the achievement of such surgical balance. Informed patient consent was obtained. A 17-yr-old female presented with seizure attacks for 2 yr. Magnetic resonance imaging (MRI) revealed a right parietal mass lesion with hypointense signal on T1W imaging, hyperintense signal on T2W imaging, and homogeneous enhancement...
May 4, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29729532/how-do-we-diagnose-and-treat-epilepsy-with-myoclonic-atonic-seizures-doose-syndrome-results-of-the-pediatric-epilepsy-research-consortium-survey
#15
Katherine Nickels, Ronald Thibert, Stephanie Rau, Scott Demarest, Elaine Wirrell, Eric H Kossoff, Charuta Joshi, Srishti Nangia, Renee Shellhaas
OBJECTIVE: To obtain and assess opinions on EMAS diagnostic criteria, recommended investigations, and therapeutic options, from a large group of physicians who care for children with EMAS. METHODS: The EMAS focus group of PERC created a survey to assess the opinions of pediatric neurologists who care for children with EMAS regarding diagnosis and treatment of this condition, which was sent to members of PERC, AES, and CNS. A Likert scale was used to assess the respondents' opinions on the importance of diagnostic and exclusion criteria (five point scale), investigations (four point scale), and treatment (six point scale) of EMAS...
April 25, 2018: Epilepsy Research
https://www.readbyqxmd.com/read/29728228/detection-of-structural-abnormalities-of-cortical-and-subcortical-gray-matter-in-patients-with-mri-negative-refractory-epilepsy-using-neurite-orientation-dispersion-and-density-imaging
#16
Masoumeh Rostampour, Hassan Hashemi, Seyed Morteza Najibi, Mohammad Ali Oghabian
PURPOSE: NODDI (Neurite Orientation Dispersion and Density Imaging) and DTI (Diffusion tensor imaging) may be useful in identifying abnormal regions in patients with MRI-negative refractory epilepsy. The aim of this study was to determine whether NODDI and DTI maps including neurite density (ND), orientation dispersion index (ODI), mean diffusivity (MD) and fractional anisotropy (FA) can detect structural abnormalities in cortical and subcortical gray matter (GM) in these patients. The correlation between these parameters and clinical characteristics of the disease was also investigated...
April 2018: Physica Medica: PM
https://www.readbyqxmd.com/read/29704039/correction-to-18-f-fdg-pet-in-drug-resistant-epilepsy-due-to-focal-cortical-dysplasia-type-2-additional-value-of-electroclinical-data-and-coregistration-with-mri
#17
Serge Desarnaud, Charles Mellerio, Franck Semah, Agathe Laurent, Elisabeth Landre, Bertrand Devaux, Catherine Chiron, Vincent Lebon, Francine Chassoux
The original version of this article has added numbers in the text which are unnecessary. Correct line should be: "We also performed PET/MRI based surgical resections in an increasing number of MRI negative/ doubtful cases with favourable outcome."
April 28, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29692969/emotional-stimuli-provoked-seizures-potentially-misdiagnosed-as-psychogenic-non-epileptic-attacks-a-case-of-temporal-lobe-epilepsy-with-amygdala-enlargement
#18
Hidetaka Tamune, Go Taniguchi, Susumu Morita, Yousuke Kumakura, Shinsuke Kondo, Kiyoto Kasai
The association between emotional stimuli and temporal lobe epilepsy (TLE) is largely unknown. Here, we report the case of a depressed, 50-year-old female complaining of episodes of a "spaced out" experience precipitated by emotional stimuli. Psychogenic non-epileptic attacks were suspected. However, video-EEG coupled with emotional stimuli-provoked procedures and MRI findings of amygdala enlargement, led to the diagnosis of left TLE. Accurate diagnosis and explanation improved her subjective depression and seizure frequency...
2018: Epilepsy & Behavior Case Reports
https://www.readbyqxmd.com/read/29686177/bilateral-giant-renal-angiomyolipoma-in-a-patient-with-tuberous-sclerosis-complex-a-case-report
#19
Andika Afriansyah, Abdul M Yusuf, Harry Nusaly
Tuberous sclerosis complex (TSC) has several renal manifestations including angiomyolipomas (AML) and renal epithelial neoplasms. A bilateral giant renal AML is extremely rare. We report a case of giant bilateral AML and discuss the diagnosis and treatment of it. The 22-year-old man was admitted due to bilateral flank pain, gross hematuria, and abdominal fullness. He had history of epilepsy, mental retardation, and delayed development during childhood. He had angiofibroma on his face since 10 years ago. Abdominal CT and MRI revealed large lobulated heterogeneous mass with fatty content...
January 2018: Acta Medica Indonesiana
https://www.readbyqxmd.com/read/29681927/altered-structural-and-functional-connectivity-of-juvenile-myoclonic-epilepsy-an-fmri-study
#20
Chengqing Zhong, Rong Liu, Cheng Luo, Sisi Jiang, Li Dong, Rui Peng, Fuqiang Guo, Pu Wang
The aim of this study was to investigate the structural and functional connectivity (FC) of juvenile myoclonic epilepsy (JME) using resting state functional magnetic resonance imaging (rs-fMRI). High-resolution T1-weighted magnetic resonance imaging (MRI) and rs-fMRI data were collected in 25 patients with JME and in 24 control subjects. A FC analysis was subsequently performed, with seeding at the regions that demonstrated between-group differences in gray matter volume (GMV). Then, the observed structural and FCs were associated with the clinical manifestations...
2018: Neural Plasticity
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