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White matter lesions on brain

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https://www.readbyqxmd.com/read/28074323/changes-in-cerebral-metabolism-during-ketogenic-diet-in-patients-with-primary-brain-tumors-1-h-mrs-study
#1
Moran Artzi, Gilad Liberman, Nachum Vaisman, Felix Bokstein, Faina Vitinshtein, Orna Aizenstein, Dafna Ben Bashat
Normal brain cells depend on glucose metabolism, yet they have the flexibility to switch to the usage of ketone bodies during caloric restriction. In contrast, tumor cells lack genomic and metabolic flexibility and are largely dependent on glucose. Ketogenic-diet (KD) was suggested as a therapeutic option for malignant brain cancer. This study aimed to detect metabolic brain changes in patients with malignant brain gliomas on KD using proton magnetic-resonance-spectroscopy ((1)H-MRS). Fifty MR scans were performed longitudinally in nine patients: four patients with recurrent glioblastoma (GB) treated with KD in addition to bevacizumab; one patient with gliomatosis-cerebri treated with KD only; and four patients with recurrent GB who did not receive KD...
January 10, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28063366/white-matter-lesions-relate-to-tract-specific-reductions-in-functional-connectivity
#2
Carolyn D Langen, Hazel I Zonneveld, Tonya White, Wyke Huizinga, Lotte G M Cremers, Marius de Groot, Mohammad Arfan Ikram, Wiro J Niessen, Meike W Vernooij
White matter lesions play a role in cognitive decline and dementia. One presumed pathway is through disconnection of functional networks. Little is known about location-specific effects of lesions on functional connectivity. This study examined location-specific effects within anatomically-defined white matter tracts in 1584 participants of the Rotterdam Study, aged 50-95. Tracts were delineated from diffusion magnetic resonance images using probabilistic tractography. Lesions were segmented on fluid-attenuated inversion recovery images...
December 14, 2016: Neurobiology of Aging
https://www.readbyqxmd.com/read/28063107/the-relationship-between-right-to-left-shunt-and-brain-white-matter-lesions-in-japanese-patients-with-migraine-a-single-center-study
#3
Akio Iwasaki, Keisuke Suzuki, Hidehiro Takekawa, Ryotaro Takashima, Ayano Suzuki, Shiho Suzuki, Koichi Hirata
BACKGROUND: There may be a link between right-to-left shunt (RLs) and brain white matter lesions (WMLs) in patients with migraine. In this study, we assessed the relationship between WMLs and RLs in Japanese migraine patients. METHODS: A total of 107 consecutive patients with migraine with (MA) and without aura (MWOA) were included in this study. Contrast transcranial Doppler ultrasound was used to detect RLs. WMLs were graded using brain magnetic resonance imaging based on well-established criteria...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28060696/acute-pancreatitis-and-posterior-reversible-encephalopathy-syndrome-a-case-report
#4
Vítor Magno Pereira, Luís Marote Correia, Tiago Rodrigues, Gorete Serrão Faria
The posterior reversible encephalopathy syndrome is a neurological syndrome characterized by headache, confusion, visual disturbances and seizures associated with identifiable areas of cerebral edema on imaging studies. The authors report the case of a man, 33 years-old, leukodermic with a history of chronic alcohol and tobacco consumption, who is admitted to the emergency department for epigastric pain radiating to the back and vomiting with about six hours of evolution and an intense holocranial headache for two hours...
September 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28056466/subacute-subclinical-brain-infarctions-after-transcatheter-aortic-valve-implantation-negatively-impact-cognitive-function-in-long-term-follow-up
#5
Alexander Ghanem, Jonas Dörner, Leonie Schulze-Hagen, Andreas Müller, Marius Wilsing, Jan-Malte Sinning, Julian Lütkens, Christian Frerker, Karl-Heinz Kuck, Ingo Gräff, Hans Schild, Nikos Werner, Eberhard Grube, Georg Nickenig
AIMS: To date every post-procedural cerebrovascular embolic event (CVE) is dreaded for its potential to accelerate cognitive decline after transcatheter aortic valve implantation (TAVI). This study differentiates the impact of acute (procedural) and post-acute cerebrovascular embolic events (CVEs) on cognitive performance. METHODS: Magnetic resonance imaging (MRI) before, early and late after TAVI was performed to quantify embolic burden. Quantification of diffusion- and T1-weighted lesions, as well as white-matter and total brain volumes, as well as cognitive function testing (MMSE) were assessed in 28 patients with a medium follow-up period of 34 months...
2017: PloS One
https://www.readbyqxmd.com/read/28047502/su-g-iep1-04-comparison-of-cerebral-blood-volume-estimated-by-dsc-and-dcemri
#6
M Aryal, Y Cao
PURPOSE: The cerebral blood volume (CBV) is commonly estimated from T2*/T2-weighted dynamic susceptibility contrast (DSC) MRI acquired by an EPI sequence. There are several challenges with DSC imaging, including geometric distortion, limited brain spatial coverage, and unreliable arterial input function (AIF) due to the partial volume effect. However, CBV can be estimated from T1-weighted dynamic contrast enhanced (DCE) MRI. This study aimed to examine whether CBV estimated from DCE-MRI is comparable to one from DSC-MRI...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043688/neonatal-surgery-for-noncardiac-congenital-anomalies-neonates-at-risk-of-brain-injury
#7
Lisanne J Stolwijk, Kristin Keunen, Linda S de Vries, Floris Groenendaal, David C van der Zee, Maud Y A van Herwaarden, Petra M A Lemmers, Manon J N L Benders
OBJECTIVE: To evaluate the incidence of brain injury after neonatal surgery for noncardiac congenital anomalies using magnetic resonance imaging (MRI). STUDY DESIGN: An MRI was obtained in 101 infants at 7 days [range: 1-115] after neonatal surgery for major noncardiac congenital anomalies. Brain injury was assessed using T1, T2, diffusion weighted imaging, and susceptibility-weighted imaging. RESULTS: Thirty-two preterm infants (<37 weeks of gestation) and 69 full-term infants were included...
December 30, 2016: Journal of Pediatrics
https://www.readbyqxmd.com/read/28038965/inversion-recovery-ultrashort-echo-time-magnetic-resonance-imaging-a-method-for-simultaneous-direct-detection-of-myelin-and-high-signal-demonstration-of-iron-deposition-in-the-brain-a-feasibility-study
#8
Vipul R Sheth, Shujuan Fan, Qun He, Yajun Ma, Jacopo Annese, Robert Switzer, Jody Corey-Bloom, Graeme M Bydder, Jiang Du
Multiple sclerosis (MS) causes demyelinating lesions in the white matter and increased iron deposition in the subcortical gray matter. Myelin protons have an extremely short T2* (<1ms) and are not directly detected with conventional clinical magnetic resonance (MR) imaging sequences. Iron deposition also reduces T2*, leading to reduced signal on clinical sequences. In this study we tested the hypothesis that the inversion recovery ultrashort echo time (IR-UTE) pulse sequence can directly and simultaneously image myelin and iron deposition using a clinical 3T scanner...
December 28, 2016: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28031423/neurologic-injury-and-cerebral-blood-flow-in-single-ventricles-throughout-staged-surgical-reconstruction
#9
Mark A Fogel, Christine J Li, Okan U Elci, Tom Pawlowski, Peter J Schwab, Felice B Wilson, Susan C Nicolson, Lisa M Montenegro, Laura Diaz, Thomas L Spray, J William Gaynor, Stephanie Fuller, Christopher E Mascio, Marc S Keller, Matthew A Harris, Kevin K Whitehead, James Bethel, Arastoo Vossough, Daniel J Licht
BACKGROUND: -Single ventricle patients experience a high rate of brain injury and adverse neurodevelopmental outcome, however, the incidence of brain abnormalities throughout surgical reconstruction and its relationship with cerebral blood flow, oxygen delivery and carbon dioxide reactivity remains unknown. METHODS: -Single ventricle patients were studied with MRI scans immediately prior to bidirectional Glenn (pre-BDG), prior to Fontan and then 3-9 months after Fontan reconstruction...
December 28, 2016: Circulation
https://www.readbyqxmd.com/read/28029606/lacunar-infarcts-rather-than-white-matter-hyperintensity-as-a-predictor-of-future-higher-level-functional-decline-the-ohasama-study
#10
Megumi Tsubota-Utsugi, Michihiro Satoh, Naoki Tomita, Azusa Hara, Takeo Kondo, Miki Hosaka, Sho Saito, Kei Asayama, Ryusuke Inoue, Mikio Hirano, Aya Hosokawa, Keiko Murakami, Takahisa Murakami, Hirohito Metoki, Masahiro Kikuya, Shin-Ichi Izumi, Yutaka Imai, Takayoshi Ohkubo
OBJECTIVE: We aimed to determine the associations between silent cerebrovascular lesions, characterized by lacunar infarcts and white matter hyperintensity, and future decline in higher level functional capacity in older community-dwelling adults. MATERIALS AND METHODS: For this observational study, we selected individuals from the general population of Ohasama, a rural Japanese community. Three hundred thirty-one participants who were free of functional decline at baseline and who were at least 60 years old underwent brain magnetic resonance imaging and answered a questionnaire on higher level functional capacity derived from the Tokyo Metropolitan Institute of Gerontology Index of Competence...
October 28, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28018467/a-rare-case-of-dysembryoplastic-neuroepithelial-tumor-combined-with-encephalocraniocutaneous-lipomatosis-and-intractable-seizures
#11
Jee-Yeon Han, Mi-Sun Yum, Eun-Hee Kim, Seokho Hong, Tae-Sung Ko
Encephalocraniocutaneous lipomatosis (ECCL) is a rare neurocutaneous syndrome that affects ectomesodermal tissues (skin, eyes, adipose tissue, and brain). The neurologic manifestations associated with ECCL are various including seizures. However, ECCL patients very rarely develop brain tumors that originate from the neuroepithelium. This is the first described case of ECCL in combination with dysembryoplastic neuroepithelial tumor (DNET) that presented with intractable seizures. A 7-year-old girl was admitted to our center because of ECCL and associated uncontrolled seizures...
November 2016: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28011382/multiple-sclerosis-therapeutic-applications-of-advancing-drug-delivery-systems
#12
REVIEW
Sanam Dolati, Zohreh Babaloo, Farhad Jadidi-Niaragh, Hormoz Ayromlou, Sanam Sadreddini, Mehdi Yousefi
Multiple sclerosis (MS) is an inflammatory autoimmune disease of the central nervous system, which is accompanying with demyelination, neurodegeneration and sensibility to oxidative stress. In MS, auto-reactive lymphocytes cross the blood-brain barrier (BBB) and reside in the perivenous demyelinating lesions which create various distinct inflammatory demyelinated plaques situated predominantly in the white matter. The current MS-related therapeutic approaches can be classified into disease-modifying therapies (DMTs) and symptomatic therapy...
December 20, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28000558/coarse-classification-to-region-scalable-refining-for-white-matter-lesions-segmentation-in-multi-channel-mri
#13
Renping Yu, Liang Xiao, Zhihui Wei
Brain lesions, especially White Matter Lesions (WMLs) that mostly found on magnetic resonance images of elderly people, are not only associated with normal aging, but also with various geriatric disorders including cardiovascular diseases, vascular disease, psychiatric disorders and dementia. Quantitative analysis of WMLs in large clinical trials is crucial in scientific investigations of such neurological diseases as well as in studying aging processes. Exploiting the different appearances of WMLs in multiple modalities, we propose a novel coarse classification to region-scalable refining method to segment WMLs in Magnetic Resonance Imaging (MRI) sequences without user intervention...
December 20, 2016: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/27986388/-3d-anatomy-of-cerebellar-peduncles-based-on-fibre-microdissection-and-a-demonstration-with-tractography
#14
Ruben Rodríguez-Mena, José Piquer-Belloch, José Luis Llácer-Ortega, Pedro Riesgo-Suárez, Vicente Rovira-Lillo
OBJECTIVE: To perform an anatomical and radiological study, using fibre microdissection and diffusion tensor tractography (DTT), to demonstrate the three-dimensionality of the superior, middle and inferior cerebellar peduncles. MATERIAL AND METHODS: A total of 15 brain-stem, 15 cerebellar hemispheres, and 5 brain hemispheres were dissected in the laboratory under the operating microscope with microsurgical instruments between July 2014 and July 2015. Brain magnetic resonance imaging was obtained from 15 healthy subjects between July and December of 2015, using diffusion-weighted images, in order to reproduce the cerebellar peduncles on DTT...
December 13, 2016: Neurocirugía
https://www.readbyqxmd.com/read/27981543/cognitive-impairment-and-quality-of-life-in-patients-with-migraine-associated-vertigo
#15
N Wang, H-L Huang, H Zhou, C-Y Yu
OBJECTIVE: To study the impact of migraine-associated vertigo (MV) on the cognitive state of patients and their quality of life. PATIENTS AND METHODS: A total of 120 patients were enrolled in the study, including 40 diagnosed with MV, forty with a simple migraine and 40 healthy volunteers. Cognitive assessments were done using the mini-mental state examination (MMSE), and a battery of tests for cognitive functions in performance, memory, language, space and attention during interictal periods...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27981029/automated-white-matter-fiber-tract-identification-in-patients-with-brain-tumors
#16
Lauren J O'Donnell, Yannick Suter, Laura Rigolo, Pegah Kahali, Fan Zhang, Isaiah Norton, Angela Albi, Olutayo Olubiyi, Antonio Meola, Walid I Essayed, Prashin Unadkat, Pelin Aksit Ciris, William M Wells, Yogesh Rathi, Carl-Fredrik Westin, Alexandra J Golby
We propose a method for the automated identification of key white matter fiber tracts for neurosurgical planning, and we apply the method in a retrospective study of 18 consecutive neurosurgical patients with brain tumors. Our method is designed to be relatively robust to challenges in neurosurgical tractography, which include peritumoral edema, displacement, and mass effect caused by mass lesions. The proposed method has two parts. First, we learn a data-driven white matter parcellation or fiber cluster atlas using groupwise registration and spectral clustering of multi-fiber tractography from healthy controls...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27974643/increased-total-sodium-concentration-in-gray-matter-better-explains-cognition-than-atrophy-in-ms
#17
Adil Maarouf, Bertrand Audoin, Fanelly Pariollaud, Soraya Gherib, Audrey Rico, Elisabeth Soulier, Sylviane Confort-Gouny, Maxime Guye, Lothar Schad, Jean Pelletier, Jean-Philippe Ranjeva, Wafaa Zaaraoui
OBJECTIVE: To investigate whether brain total sodium accumulation assessed by (23)Na MRI is associated with cognitive deficit in relapsing-remitting multiple sclerosis (RRMS). METHODS: Eighty-nine participants were enrolled in the study (58 patients with RRMS with a disease duration ≤10 years and 31 matched healthy controls). Patients were classified as cognitively impaired if they failed at least 2 tasks on the Brief Repeatable Battery. MRI was performed at 3T using (23)Na MRI to obtain total sodium concentration (TSC) in the different brain compartments (lesions, normal-appearing white matter [NAWM], gray matter [GM]) and (1)H- magnetization-prepared rapid gradient echo to assess GM atrophy (GM fraction)...
December 14, 2016: Neurology
https://www.readbyqxmd.com/read/27936193/occurrence-of-asymptomatic-acute-neuromyelitis-optica-spectrum-disorder-typical-brain-lesions-during-an-attack-of-optic-neuritis-or-myelitis
#18
Su-Hyun Kim, Jae-Won Hyun, AeRan Joung, Sang Hyun Lee, Ho Jin Kim
We aimed to investigate the frequency of asymptomatic acute brain MRI abnormalities accompanying optic neuritis (ON) or myelitis in neuromyelitis optica spectrum disorder (NMOSD) patients with aquaporin-4 antibodies (AQP4-Ab). We reviewed 324 brain MRI scans that were obtained during acute attacks of ON or myelitis, in 165 NMOSD patients with AQP4-Ab. We observed that acute asymptomatic NMOSD-typical brain lesions accompanied 27 (8%) acute attacks of ON or myelitis in 24 (15%) patients. The most common asymptomatic brain abnormalities included edematous corpus callosum lesions (n = 17), followed by lesions on the internal capsule and/or cerebral peduncle lesions (n = 9), periependymal surfaces of the fourth ventricle (n = 5), large deep white matter lesions (n = 4), periependymal cerebral lesions surrounding the lateral ventricles (n = 3), and hypothalamic lesions (n = 1)...
2016: PloS One
https://www.readbyqxmd.com/read/27935825/microglia-activation-in-a-pediatric-rabbit-model-of-tuberculous-meningitis
#19
Elizabeth W Tucker, Supriya Pokkali, Zhi Zhang, Vincent P DeMarco, Mariah Klunk, Elizabeth S Smith, Alvaro A Ordonez, Marie-France Penet, Zaver Bhujwalla, Sanjay K Jain, Sujatha Kannan
Central nervous system (CNS) tuberculosis (TB) is the most severe form of extra-pulmonary TB and disproportionately affects young children where the developing brain has a unique host response. New Zealand white rabbits were infected with Mycobacterium tuberculosis via subarachnoid inoculation at postnatal day 4-8 and evaluated until 4-6 weeks post-infection. Control and infected rabbit kits were assessed for the development of neurological deficits, bacterial burden, and postmortem microbiologic and pathologic changes...
December 1, 2016: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/27933697/total-magnetic-resonance-imaging-burden-of-cerebral-small-vessel-disease-is-associated-with-post-stroke-depression-in-patients-with-acute-lacunar-stroke
#20
X Zhang, Y Tang, Y Xie, C Ding, J Xiao, X Jiang, H Shan, Y Lin, C Li, D Hu, T Li, L Sheng
BACKGROUND AND PURPOSE: Despite extensive studies on post-stroke depression (PSD), the role of the total burden of cerebral small-vessel disease (cSVD) in its pathogenesis remains unclear. METHODS: We conducted a magnetic resonance imaging (MRI)-based cohort study to investigate the relationship between total MRI burden of cSVD and PSD among patients with first-ever lacunar stroke. From June 2013 to January 2016, 374 patients were consecutively recruited. PSD was identified using the Chinese version of the Structured Clinical Interview for DSM-IV...
December 9, 2016: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
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