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https://www.readbyqxmd.com/read/27922241/an-unusual-case-of-neuroblastoma-a-17-year-old-adolescent-presented-with-bilateral-diffuse-lung-metastasis-at-initial-diagnosis
#1
Çağlar Ödek, Tanıl Kendirli, Esra Pekpak, Ayhan Yaman, Başak Adaklı-Aksoy, Handan Dinçaslan, Nurdan Taçyıldız, Emel Ünal, Erdal İnce, Gülsan Yavuz
Neuroblastoma (NB) is the most frequently diagnosed neoplasm during infancy and its incidence declines within the first 3-5 years of life. It can be rarely diagnosed in adolescents and young adults. Adolescents have advanced stage of disease, higher frequency of uncommon metastatic sites such as lungs, and worse outcomes. Herein, we describe an unusual case of NB in a 17-year-old adolescent presented with lung metastasis at diagnosis. The patient was diagnosed with stage IV NB. Thorax high-resolution computed tomography (HRCT) scan revealed irregular septal thickening with ground glass opacity consistent with pulmonary parenchymal metastases...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27921204/a-case-of-double-depressor-palsy-followed-by-pursuit-deficit-due-to-sequential-infarction-in-bilateral-thalamus-and-right-medial-superior-temporal-area
#2
Su Jin Kim, Myeong In Yeom, Seung Uk Lee
BACKGROUND: We present a unique case of a patient who suffered two rare events affecting the supranuclear control, first of the vertical and second of the horizontal eye movements. The first event involved bilateral thalamic infarcts that resulted in double depressor palsy. The second event occurred 1 year later and it involved supranuclear control of horizontal eye movements creating pursuit deficit. CASE PRESENTATION: A 47-year-old male presented with complaints of diplopia upon awakening...
December 5, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27921171/computed-tomography-and-magnetic-resonance-fusion-imaging-in-cholesteatoma-preoperative-assessment
#3
Agustín Campos, Federico Mata, Rosa Reboll, María Luisa Peris, Jorge Basterra
The purpose of this study is to describe a method for developing fusion imaging for the preoperative evaluation of cholesteatoma. In 33 patients diagnosed with cholesteatoma, a high-resolution temporal bone computed tomography (CT) scan without intravenous contrast and propeller diffusion-weighted magnetic resonance imaging (MRI) were performed. Both studies were then sent to the BrainLAB work station, where the images were fused to obtain a morphological and color map. Intraoperative findings coincided with fusion CT-MRI imaging in all but two patients...
December 5, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27921168/the-2016-diagnostic-criteria-for-primary-sclerosing-cholangitis
#4
Takahiro Nakazawa, Kenji Notohara, Susumu Tazuma, Atsushi Tanaka, Hiroyuki Isayama, Toshio Tsuyuguchi, Toshiyuki Mori, Hajime Takikawa
BACKGROUND: Primary sclerosing cholangitis (PSC) is a chronic cholestatic liver disease of unknown cause that is characterized pathologically by an inflammatory and fibrotic process centered on the epithelium, leading to diffuse biliary stenosis and increased wall thickness throughout the intra- and extra-hepatic biliary trees. A nationwide survey in Japan revealed several differences in the clinical aspects of PSC between Japan and Western countries. PSC was recently designated an intractable hepatobiliary disease in Japan...
December 5, 2016: Journal of Gastroenterology
https://www.readbyqxmd.com/read/27920938/comparison-of-effectiveness-between-cork-screw-and-peg-screw-electrodes-for-transcranial-motor-evoked-potential-monitoring-using-the-finite-element-method
#5
Ryosuke Tomio, Takenori Akiyama, Takayuki Ohira, Kazunari Yoshida
BACKGROUND: Intraoperative monitoring of motor evoked potentials by transcranial electric stimulation is popular in neurosurgery for monitoring motor function preservation. Some authors have reported that the peg-screw electrodes screwed into the skull can more effectively conduct current to the brain compared to subdermal cork-screw electrodes screwed into the skin. The aim of this study was to investigate the influence of electrode design on transcranial motor evoked potential monitoring...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27920897/impact-of-biopolymer-matrices-on-relaxometric-properties-of-contrast-agents
#6
Alfonso Maria Ponsiglione, Maria Russo, Paolo Antonio Netti, Enza Torino
Properties of water molecules at the interface between contrast agents (CAs) for magnetic resonance imaging and macromolecules could have a valuable impact on the effectiveness of metal chelates. Recent studies, indeed, demonstrated that polymer architectures could influence CAs' relaxivity by modifying the correlation times of the metal chelate. However, an understanding of the physico-chemical properties of polymer/CA systems is necessary to improve the efficiency of clinically used CAs, still exhibiting low relaxivity...
December 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27920875/diffuse-thyroid-metastases-and-bilateral-internal-jugular-vein-tumor-thrombus-from-renal-cell-cancer
#7
Priyanka Jha, Mallika Shekhar, Jennifer Wan, Carina Mari-Aparici
Renal cell cancer rarely metastasizes to the thyroid gland, and it has been reported to present as a solitary mass. We present a case of diffuse thyroid cancer metastases from renal cell cancer. Bilateral internal jugular vein tumor thrombi were also present. To the best of our knowledge, this is the first description of diffuse thyroid metastases from renal cell cancer in the English literature. Renal cell cancer metastases should be considered in the differential of thyroid imaging abnormalities arising in the setting of known renal cell carcinoma, particularly late in the course of disease...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920873/migratory-stroke-like-lesions-in-a-case-of-adult-onset-mitochondrial-encephalomyopathy-lactic-acidosis-and-stroke-like-episodes-melas-syndrome-and-a-review-of-imaging-findings
#8
Stephen S Cai, Rainer von Coelln, Theresa J Kouo
Imaging findings of adult-onset mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) syndrome is poorly documented. The authors present a 48-year-old woman with subacute onset of word-finding difficulties and right arm stiffness. Magnetic resonance imaging performed 2 weeks prior revealed left temporal lobe diffusion and fluid-attenuated inversion recovery hyperintensity predominantly involving the cortex. The apparent diffusion coefficient map showed preserved signal in the temporal cortex...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920853/magnetic-resonance-imaging-of-adenoma-malignum-of-the-uterine-cervix-with-pathologic-correlation-a-case-report
#9
Alba Castán Senar, Blanca Paño, Adela Saco, Carlos Nicolau
Adenoma malignum (AM) is considered a rare subtype of cervical adenocarcinoma. Although previous reports have described magnetic resonance findings, none of these reports evaluated the utility of diffusion-weighted imaging in the differential diagnosis of AM and other multicystic cervical lesions. We present a case report of an AM that did not show restriction on the apparent diffusion coefficient map, which can be explained by the low cellularity of the tumor. This is consistent with the proper correlation between the diffusion imaging and histopathology of the tumor...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920654/a-rare-cause-of-pulmonary-nodules
#10
Michael Tsuyoshi Chew, Eric Chak, Karen Matsukuma
Crohn's disease is a chronic, idiopathic autoimmune disorder that primarily targets the gastrointestinal (GI) system. It is characterized by transmural inflammation of the GI tract that can occur anywhere from the mouth to the anus. Not infrequently, the disease may also have extraintestinal manifestations (EIMs) that can affect almost any organ system. It is estimated that EIMs affect up to 36% of patients with Crohn's disease, but the incidence and prevalence of pulmonary involvement are variable in the literature and may be as low as 0...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/27920570/formation-of-tight-junctions-between-neighboring-podocytes-is-an-early-ultrastructural-feature-in-experimental-crescentic-glomerulonephritis
#11
Lena Succar, Ross A Boadle, David C Harris, Gopala K Rangan
PURPOSE: In crescentic glomerulonephritis (CGN), the development of cellular bridges between podocytes and parietal epithelial cells (PECs) triggers glomerular crescent formation. However, the sequential changes in glomerular ultrastructure in CGN are not well defined. This study investigated the time course of glomerular ultrastructure in experimental CGN. METHODS: Transmission electron microscopy (TEM) was performed using kidney samples from rats with nephrotoxic serum nephritis (NSN) from day 1 to day 14...
2016: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/27920266/variability-of-ponto-cerebellar-fibers-by-diffusion-tensor-imaging-in-diverse-brain-malformations
#12
Nancy K Rollins, Timothy N Booth, Maria H Chahrour
To describe pontine axonal anomalies across diverse brain malformations. Institutional review board-approved review of magnetic resonance imaging (MRI) and genetic testing of 31 children with brain malformations and abnormal pons by diffusion tensor imaging. Anomalous dorsal pontocerebellar tracts were seen in mid-hindbrain anomalies and in diffuse malformations of cortical development including lissencephaly, gyral disorganization with dysplastic basal ganglia, presumed congenital fibrosis of extraocular muscles type 3, and in callosal agenesis without malformations of cortical development...
December 5, 2016: Journal of Child Neurology
https://www.readbyqxmd.com/read/27920021/venous-and-arterial-air-embolism-a-rare-phenomenon-with-fatal-consequences
#13
Jatan Shah, Nasheena Jiwa, Natasha Mamdani, David Hill
Air embolism is often an iatrogenic complication which may occur in venous or arterial circulation depending on the port of entry. We present two cases in which air embolism occurred in venous and arterial circulation after contrast medium injection (CMI) and coronary artery bypass graft (CABG) surgery, respectively. In one case, accumulation of air bubbles was observed in the pulmonary artery after CMI. This was attributed to inadvertent injection of air owing to improper connection of the injector and the catheter...
December 5, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27919982/clinical-significance-of-the-apparent-diffusion-coefficient-ratio-in-prostate-cancer-treatment-with-intensity-modulated-radiotherapy
#14
Hiroko Yamaguchi, Masatoshi Hori, Osamu Suzuki, Yuji Seo, Fumiaki Isohashi, Yasuo Yoshioka, Iori Sumida, Motohide Uemura, Kazutoshi Fujita, Akira Nagahara, Takeshi Ujike, Atsunari Kawashima, Norio Nonomura, Noriyuki Tomiyama, Kazuhiko Ogawa
AIM: We aimed to investigate the correlation between biochemical recurrence (BCR) and the pretreatment apparent diffusion coefficient (ADC) ratio of tumor to normal prostate tissue in patients with prostate cancer who underwent intensity-modulated radiotherapy (IMRT). PATIENTS AND METHODS: Retrospective analyses were performed for 101 patients diagnosed with localized prostate cancer who underwent IMRT at a dose of 70-78 Gy to the prostate gland and medial part of the seminal vesicles...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27919861/multiparametric-mri-in-differentiating-pulmonary-artery-sarcoma-and-pulmonary-thromboembolism-a-preliminary-experience
#15
Min Liu, Chunhai Luo, Ying Wang, Xiaojuan Guo, Zhanhong Ma, Yuanhua Yang, Tianjing Zhang
PURPOSE: We aimed to define multiparametric magnetic resonance imaging (MRI) findings to differentiate between pulmonary artery sarcoma (PAS) and pulmonary thromboembolism (PTE). METHODS: Eleven patients with suspected PTE were prospectively included to undergo pulmonary MRI before surgery or biopsy. MRI protocol included an unenhanced sequence, diffusion-weighted imaging (DWI, b=800 s/mm2) and a dynamic contrast-enhanced sequence. Morphologic characteristics including distribution, filling defect, and intensity were observed on T1-, T2-, and fat-suppressed T2-weighted imaging, DWI, and contrast-enhanced MRI...
December 6, 2016: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/27919751/less-head-motion-during-mri-under-task-than-resting-state-conditions
#16
Willem Huijbers, Koene R A Van Dijk, Meta M Boenniger, Rüdiger Stirnberg, Monique M B Breteler
Head motion reduces data quality of neuroimaging data. In three functional magnetic resonance imaging (MRI) experiments we demonstrate that people make less head movements under task than resting-state conditions. In Experiment 1, we observed less head motion during a memory encoding task than during the resting-state condition. In Experiment 2, using publicly shared data from the UCLA Consortium for Neuropsychiatric Phenomics LA5c Study, we again found less head motion during several active task conditions than during a resting-state condition, although some task conditions also showed comparable motion...
December 2, 2016: NeuroImage
https://www.readbyqxmd.com/read/27919610/renal-artery-stenosis-in-patients-with-peripheral-artery-disease-prevalence-risk-factors-and-long-term-prognosis
#17
V Aboyans, I Desormais, J Magne, G Morange, D Mohty, P Lacroix
OBJECTIVE/BACKGROUND: The objective was to determine the prevalence and clinical determinants of renal artery stenosis (RAS) in patients undergoing digital subtraction angiography (DSA) for the assessment of peripheral artery disease (PAD), and to evaluate its prognostic significance. METHODS: All DSAs performed from January 2000 to January 2006 were retrospectively reviewed for assessment of PAD in patients naive for any prior revascularisation of lower-limb arteries...
December 2, 2016: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/27919508/the-evaluation-of-mri-diffusion-values-of-active-demyelinating-lesions-in-multiple-sclerosis
#18
Mohammad Abdoli, Santanu Chakraborty, Heather J MacLean, Mark S Freedman
BACKGROUND: Gadolinium (Gd) enhancement of lesions is the main radiologic marker for detection of activity in Multiple Sclerosis (MS). This study compares Diffusion weighted imaging (DWI) characteristics and enhancement to determine whether DWI can be used as an alternative to Gd administration. METHODS: A retrospective study of 72 patients who had MRI with Gd and DWI. Visual assessment and comparison of the Apparent Diffusion Coefficient (ADC) values on Gd+ lesions, all lesions showing restricted diffusion, 2 Gd- lesions and 1 area of normal-appearing white matter (NAWM) in each MRI were performed...
November 2016: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/27918827/optic-radiations-microstructural-changes-in-glaucoma-and-association-with-severity-a-study-using-3tesla-magnetic-resonance-diffusion-tensor-imaging
#19
Laury Tellouck, Muriel Durieux, Pierrick Coupé, Audrey Cougnard-Grégoire, Joy Tellouck, Thomas Tourdias, Fanny Munsch, Arnaud Garrigues, Catherine Helmer, Florence Malet, Jean-François Dartigues, Vincent Dousset, Cécile Delcourt, Cédric Schweitzer
Purpose: To compare microstructural changes along the optical radiations and brain structure volumes between glaucoma and control subjects using in vivo magnetic resonance imaging and to analyze their association with severity of the disease. Methods: A total of 50 open-angle glaucoma subjects and 50 healthy age- and sex-matched controls underwent detailed ophthalmologic examinations (including visual field testing [VF], funduscopy, and spectral-domain optical coherence tomography) as well as diffusion tensor imaging (DTI) using 3...
December 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27918621/single-particle-raster-image-analysis-of-diffusion
#20
M Longfils, E Schuster, N Lorén, A Särkkä, M Rudemo
As a complement to the standard RICS method of analysing Raster Image Correlation Spectroscopy images with estimation of the image correlation function, we introduce the method SPRIA, Single Particle Raster Image Analysis. Here, we start by identifying individual particles and estimate the diffusion coefficient for each particle by a maximum likelihood method. Averaging over the particles gives a diffusion coefficient estimate for the whole image. In examples both with simulated and experimental data, we show that the new method gives accurate estimates...
December 5, 2016: Journal of Microscopy
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