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https://www.readbyqxmd.com/read/28433979/lethal-high-acute-disseminated-encephalomyelitis-adem-triggered-by-toxic-effect-of-synthetic-cannabinoid-black-mamba
#1
Kiran Samra, Ian S Boon, Gregory Packer, Saiju Jacob
A previously well 25-year-old man presented with agitation, double incontinence and left-sided incoordination. His symptoms started after smoking a synthetic cannabinoid (black mamba) 5 days earlier. Over 48 hours, he developed aphasia, generalised hypertonia, hyper-reflexia and dense left hemiparesis. This progressed to profuse diaphoresis, fever, tachycardia, hypertension and a possible seizure necessitating admission to the intensive care unit. CT head and cerebrospinal fluid analysis were unremarkable...
April 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28433648/repeated-threat-without-direct-harm-alters-metabolic-capacity-in-select-regions-that-drive-defensive-behavior
#2
D J Kim, A S Lee, A A Yttredahl, R Gómez-Rodríguez, B J Anderson
To understand the behavioral consequences of intermittent anticipatory stress resulting from threats without accompanying physiological challenges, we developed a semi-naturalistic rodent housing and foraging environment that can include threats that are unpredictable in timing. Behavior is automatically recorded while rats forage for food or water. Over three weeks, the threats have been shown to elicit risk assessment behaviors, increase defensive burying and increase adrenal gland weight. To identify brain regions activated by this manipulation, we measured cytochrome c oxidase (COX), which is tightly coupled to neural activity...
April 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28432674/partial-volume-correction-of-brain-pet-studies-using-iterative-deconvolution-in-combination-with-hypr-denoising
#3
Sandeep S V Golla, Mark Lubberink, Bart N M van Berckel, Adriaan A Lammertsma, Ronald Boellaard
BACKGROUND: Accurate quantification of PET studies depends on the spatial resolution of the PET data. The commonly limited PET resolution results in partial volume effects (PVE). Iterative deconvolution methods (IDM) have been proposed as a means to correct for PVE. IDM improves spatial resolution of PET studies without the need for structural information (e.g. MR scans). On the other hand, deconvolution also increases noise, which results in lower signal-to-noise ratios (SNR). The aim of this study was to implement IDM in combination with HighlY constrained back-PRojection (HYPR) denoising to mitigate poor SNR properties of conventional IDM...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28432539/early-onset-ventilator-associated-pneumonia-in-patients-with-severe-traumatic-brain-injury-incidence-risk-factors-and-consequences-in-cerebral-oxygenation-and-outcome
#4
Pierre Esnault, Cédric Nguyen, Julien Bordes, Erwan D'Aranda, Ambroise Montcriol, Claire Contargyris, Jean Cotte, Philippe Goutorbe, Christophe Joubert, Arnaud Dagain, Henry Boret, Eric Meaudre
BACKGROUND: Early-onset ventilator-associated pneumonia (EOVAP) occurs frequently in severe traumatic brain-injured patients, but potential consequences on cerebral oxygenation and outcome have been poorly studied. The objective of this study was to describe the incidence, risk factors for, and consequences on cerebral oxygenation and outcome of EOVAP after severe traumatic brain injury (TBI). METHODS: We conducted a retrospective, observational study including all intubated TBI admitted in the trauma center...
April 21, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28432144/age-related-effects-and-sex-differences-in-gray-matter-density-volume-mass-and-cortical-thickness-from-childhood-to-young-adulthood
#5
Efstathios D Gennatas, Brian B Avants, Daniel H Wolf, Theodore D Satterthwaite, Kosha Ruparel, Rastko Ciric, Hakon Hakonarson, Raquel E Gur, Ruben C Gur
Developmental structural neuroimaging studies in humans have long described decreases in gray matter volume and cortical thickness during adolescence. Gray matter density, a measure often assumed to be highly related to volume, has not been systematically investigated in development. We used T1 imaging data collected on the Philadelphia Neurodevelopmental Cohort to study age-related effects and sex differences in four regional gray matter measures in 1189 youths aged 8 to 23 years. Custom T1 segmentation and a novel high-resolution gray matter parcellation were used to extract gray matter density (GMD), gray matter volume (GMV), gray matter mass (GMM, defined as GMD * GMV), and cortical thickness (CT) from 1625 brain regions...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28431870/the-effect-of-hypertonic-saline-and-mannitol-on-coagulation-in-moderate-traumatic-brain-injury-patients
#6
Haifeng Wang, Hongshi Cao, Xiaohong Zhang, Liang Ge, Li Bie
BACKGROUND: Hyperosmolar therapy, using either hypertonic saline (HTS) or mannitol (MT), is considered the treatment of choice for intracranial hypertension, a disorder characterized by high intracranial pressure (ICP). However, hyperosmolar agents have been postulated to impair coagulation and platelet function. The aim of this study was to identify whether HTS and MT could affect coagulation in moderate traumatic brain injury (TBI) patients. METHODS: In this prospective and randomized double-blind study, we included adult patients with moderate TBI...
April 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28431773/atypical-moyamoya-syndrome-with-brain-calcification-and-stenosis-of-abdominal-aorta-and-renal-arteries
#7
Hideki Uchikawa, Katsunori Fujii, Mayuko Fujita, Tomoko Okunushi, Naoki Shimojo
Moyamoya syndrome is a progressive cerebrovascular disease that is characterized by stenosis of the terminal portion of the internal carotid artery and its main branches, in combination with an accompanying disease. We herein describe an 8-year-old boy exhibiting transient loss of consciousness, who had recurrent seizures in infancy with progressive brain calcification. On admission, he was alert but magnetic resonance angiography showed bilateral stenosis of the whole internal carotid artery and proliferation of vascular collaterals, and brain CT revealed calcification on bilateral putamen...
April 18, 2017: Brain & Development
https://www.readbyqxmd.com/read/28431614/permeability-surface-area-product-analysis-in-malignant-brain-edema-prediction-a-pilot-study
#8
O Volny, P Cimflova, T-Y Lee, B K Menon, C D d'Esterre
BACKGROUND AND PURPOSE: Using an extended CT perfusion acquisition (150s), we sought to determine the association between perfusion parameters and malignant edema after ischemic stroke. METHODS: Patients (from prospective study PROVE-IT, NCT02184936) with terminal internal carotid artery±proximal middle cerebral occlusion were involved. CTA was assessed for clot location and status of leptomeningeal collaterals. The following CTP parameters were calculated within the ischemic territory and contralaterally: permeability surface area product (PS), cerebral blood flow (CBF) and cerebral blood volume (CBV)...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28431519/semi-automatic-synthesis-and-biodistribution-of-n-2-18-f-fluoropropionyl-bis-zinc-ii-dipicolylamine-18-f-fp-dpazn2-for-ad-model-imaging
#9
Fuhua Wen, Dahong Nie, Kongzhen Hu, Ganghua Tang, Shaobo Yao, Caihua Tang
BACKGROUND: Phosphatidylserine (PS)-targeting positron emission tomography (PET) imaging with labeled small-molecule tracer is a crucial non-invasive molecule imaging method of apoptosis. In this study, semi-automatic radiosynthesis and biodistribution of N-(2-(18)F-fluoropropionyl)-bis(zinc(II)-dipicolylamine) ((18)F-FP-DPAZn2), as a potential small-molecule tracer for PET imaging of cell death in Alzheimer's disease (AD) model, were performed. METHODS: (18)F-FP-DPAZn2 was synthesized on the modified PET-MF-2V-IT-I synthesizer...
April 21, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28428473/technical-considerations-on-scanning-and-image-analysis-for-amyloid-pet-in-dementia
#10
Go Akamatsu, Akihito Ohnishi, Kazuki Aita, Yasuhiko Ikari, Yasuji Yamamoto, Michio Senda
Brain imaging techniques, such as computed tomography (CT), magnetic resonance imaging (MRI), single photon emission computed tomography (SPECT), and positron emission tomography (PET), can provide essential and objective information for the early and differential diagnosis of dementia. Amyloid PET is especially useful to evaluate the amyloid-β pathological process as a biomarker of Alzheimer's disease. This article reviews critical points about technical considerations on the scanning and image analysis methods for amyloid PET...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28424453/comorbid-human-immunodeficiency-virus-hiv-and-muscle-specific-kinase-musk-myasthenia-gravis-a-case-report-and-literature-review
#11
Michael Sherpa, Ravi K Metai, Viki Kumar, Tinu Hirachan, Kawser U Ahmed, Sharon J Atkinson
BACKGROUND HIV infections with concomitant immunologically-mediated disorders have been frequently described but there has been little research on the association between HIV and myasthenia gravis. MuSK myasthenia gravis coexisting with HIV is an even a rarer entity and can occur as a part of immune restoration disease. We report the case of a patient with asymptomatic HIV infection who presented with new-onset MuSK myasthenia gravis. CASE REPORT A 44-year-old African-American woman with HIV since 2004 and on highly active antiretroviral therapy (HAART) presented to the ED with complains of double vision and difficulty swallowing for 2 weeks...
April 20, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28421396/-11-c-methionine-pet-ct-findings-in-benign-brain-disease
#12
REVIEW
Reiko Nakajima, Ken Kimura, Koichiro Abe, Shuji Sakai
(11)C-methionine (MET) is one of the most commonly used positron emission tomography (PET) tracers for evaluation of malignant brain tumor, with MET-PET being a sensitive technique for visualization of primary and recurrent malignant brain tumors. However, previous reports have demonstrated MET uptake in lesions associated with benign brain diseases. These diseases usually show an increase in MET uptake similar to that of malignant tumors. This pitfall in MET-PET image interpretation is important not only for nuclear medicine professionals, but also for radiologists...
April 18, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28420337/right-aortic-arch-analysis-anatomical-variant-or-serious-vascular-defect
#13
Agata Arazińska, Michał Polguj, Konrad Szymczyk, Magdalena Kaczmarska, Łukasz Trębiński, Ludomir Stefańczyk
BACKGROUND: The right-sided aortic arch (RAA) is a rare congenital defect of the aorta. The aim of the study was to assess the occurrence of RAA in diagnoses performed by the University Radiology Department and analyze the frequency of concomitant vascular abnormalities. METHODS: The database of the Radiology Department was retrospectively analyzed between January 2008 and May 2016 with the keyword "right aortic arch". Twenty patients with this diagnosis were identified from a total of 11,690 CT examinations of the chest area, 19,623 CT examinations of brain-supplying vessels, and 1863 MRI examinations of the heart and aortic arch or brain-supplying arteries...
April 19, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28419949/characteristics-of-seizure-induced-signal-changes-on-mri-in-patients-with-first-seizures
#14
Si Eun Kim, Byung In Lee, Kyong Jin Shin, Sam Yeol Ha, JinSe Park, Kang Min Park, Hyung Chan Kim, Joonwon Lee, Soo-Young Bae, Dongah Lee, Sung Eun Kim
PURPOSE: The aim of this study was to investigate the predictive factors and identify the characteristics of the seizure-induced signal changes on MRI (SCM) in patients with first seizures. METHODS: We conducted a retrospective study of patients with first seizures from March 2010 to August 2014. The inclusion criteria for this study were patients with 1) first seizures, and 2) MRI and EEG performed within 24h of the first seizures. The definition of SCM was hyper-intensities in the brain not applying to cerebral arterial territories...
April 11, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28419645/diagnostic-performance-of-different-imaging-modalities-in-the-assessment-of-distant-metastasis-and-local-recurrence-of-tumor-in-patients-with-non-small-cell-lung-cancer
#15
Yoshiharu Ohno, Takeshi Yoshikawa, Yuji Kishida, Shinichiro Seki, Hisanobu Koyama, Masao Yui, Yoshimori Kassai, Kota Aoyagi, Shigeo Kaminaga, Kazuro Sugimura
PURPOSE: To compare the diagnostic performance of positron emission tomography with [18F] fluoro-2-deoxy-glucose (FDG-PET) coregistered with magnetic resonance imaging (FDG-PET/MRI), MRI with and without diffusion-weighted imaging (DWI), FDG-PET fused with computed tomography (FDG-PET/CT) with brain contrast-enhanced (CE-) MRI, and routine radiological examination for assessment of postoperative recurrence in nonsmall-cell lung cancer (NSCLC) patients. MATERIALS AND METHODS: 96 consecutive postoperative NSCLC patients (52 men, 44 women; mean age 72 years) prospectively underwent whole-body 3T MRI with and without DWI; PET/CTs and routine radiological examinations consisted of CE-brain MRI, whole-body CE-CT, and bone scintigraphy...
April 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28419635/canine-histiocytic-sarcoma-presenting-as-a-target-lesion-on-brain-magnetic-resonance-imaging-and-as-a-solitary-pulmonary-mass
#16
Jill Hicks, Renee Barber, Bronwen Childs, Shannon Gm Kirejczyk, Elizabeth W Uhl
A 6-year-old spayed female miniature schnauzer presented with generalized seizures and progressive multifocal intracranial neurologic disease. Thoracic radiographs and computed tomography (CT) revealed a large solitary pulmonary mass within the right cranial lung lobe. On brain magnetic resonance imaging (MRI), a solitary intraparenchymal mass within the left piriform lobe had a "target" appearance on both pre- and postcontrast sequences. Cerebrospinal fluid was unremarkable and histopathology indicated both masses represented histiocytic sarcoma...
April 17, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28419114/h-fabp-a-new-biomarker-to-differentiate-between-ct-positive-and-ct-negative-patients-with-mild-traumatic-brain-injury
#17
Linnéa Lagerstedt, Juan José Egea-Guerrero, Alejandro Bustamante, Joan Montaner, Ana Rodríguez-Rodríguez, Amir El Rahal, Natacha Turck, Manuel Quintana, Roser García-Armengol, Carmen Melinda Prica, Elisabeth Andereggen, Lara Rinaldi, Asita Sarrafzadeh, Karl Schaller, Jean-Charles Sanchez
The majority of patients with mild traumatic brain injury (mTBI) will have normal Glasgow coma scale (GCS) of 15. Furthermore, only 5%-8% of them will be CT-positive for an mTBI. Having a useful biomarker would help clinicians evaluate a patient's risk of developing intracranial lesions. The S100B protein is currently the most studied and promising biomarker for this purpose. Heart fatty-acid binding protein (H-FABP) has been highlighted in brain injury models and investigated as a biomarker for stroke and severe TBI, for example...
2017: PloS One
https://www.readbyqxmd.com/read/28417489/management-of-septic-emboli-in-patients-with-infectious-endocarditis
#18
Seyed Hossein Aalaei-Andabili, Tomas Martin, Phillip Hess, Brian Hoh, Meshka Anderson, Charles T Klodell, Thomas M Beaver
BACKGROUND AND AIM: Septic emboli (SE) associated with infectious endocarditis (IE) can result in splenic abscesses and infectious intracranial aneurysms (IIA). We investigated the impact of SE on patient outcomes following surgery for IE. METHOD: From January-2000 to October-2015, all patients with surgical IE (n = 437) were evaluated for incidence and management of SE. RESULTS: Overall SE was found in 46/437 (10.52%) patients (n = 17 spleen, 13 brain, and 16 both)...
April 17, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28417232/healthy-cortical-development-through-adolescence-and-early-adulthood
#19
Natalie J Forde, Lisa Ronan, Marcel P Zwiers, Lizanne J S Schweren, Aaron F Alexander-Bloch, Barbara Franke, Stephen V Faraone, Jaap Oosterlaan, Dirk J Heslenfeld, Catharina A Hartman, Jan K Buitelaar, Pieter J Hoekstra
Adolescence is a period of significant brain changes; however, the effects of age and sex on cortical development are yet to be fully characterized. Here, we utilized innovative intrinsic curvature (IC) analysis, along with the traditional cortical measures [cortical thickness (CT), local gyrification index (LGI), and surface area (SA)], to investigate how these indices (1) relate to each other and (2) depend on age and sex in adolescent cortical development. T1-weighted magnetic resonance images from 218 healthy volunteers (age range 8...
April 17, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28416429/-life-threatening-sleepwalking-elpenor-s-syndrome-in-a-10-year-old-child
#20
M-A Madigand-Tordjman, P-J Egler, F Bertran, M Jokic, F Guénolé
Though benign in the majority of cases, sleepwalking sometimes causes injuries due, among other causes, to falls. Such accidents can be life-threatening - a situation that has been termed Elpenor syndrome (in reference to an accident experienced by a character in Homer's epic The Odyssey) - in particular when entailing defenestration. This syndrome has been described in adults and adolescents; we report here a case in a child. OBSERVATION: This 10-year-old girl was admitted at night to our hospital after a 3-m fall at home...
April 14, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
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