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D Mata-Mbemba, M Zapotocky, S Laughlin, M D Taylor, V Ramaswamy, C Raybaud
BACKGROUND AND PURPOSE: Molecular grouping of medulloblastoma correlates with prognosis and supports the therapeutic strategy. We provide our experience with the imaging features of primary and metastatic disease in relation to the molecular groups. MATERIALS AND METHODS: One hundred nineteen consecutive patients (mean age, 7.3 ± 3.8 years at diagnosis; male, 79 [66.4%]) with a confirmed diagnosis of medulloblastoma and interpretable pretreatment MRIs were retrieved from our data base from January 2000 to December 2016...
March 15, 2018: AJNR. American Journal of Neuroradiology
S M Niaz Arifin, Gregory R Madey, Alexander Vyushkov, Benoit Raybaud, Thomas R Burkot, Frank H Collins
January 1, 2017: Database: the Journal of Biological Databases and Curation
Michal Zapotocky, Daddy Mata-Mbemba, David Sumerauer, Petr Liby, Alvaro Lassaletta, Josef Zamecnik, Lenka Krskova, Martin Kyncl, Jan Stary, Suzanne Laughlin, Anthony Arnoldo, Cynthia Hawkins, Uri Tabori, Michael D Taylor, Eric Bouffet, Charles Raybaud, Vijay Ramaswamy
OBJECTIVE Metastatic dissemination is a major treatment challenge and cause of death in patients with medulloblastoma. However, the influence of molecular biology on the pattern of metastatic dissemination at diagnosis is not known. In this study, the authors sought to define the location, pattern, and imaging characteristics of medulloblastoma metastases across subgroups at diagnosis. METHODS A consecutive cohort of patients with metastatic medulloblastoma at The Hospital for Sick Children and the University Hospital Motol, who underwent up-front MRI of the craniospinal axis, was assembled and allocated to subgroups using NanoString limited gene-expression profiling...
February 2018: Journal of Neurosurgery. Pediatrics
Jérôme Ory, Charline Mourgues, Evelyne Raybaud, Russell Chabanne, Jean Christophe Jourdy, Fabien Belard, Renaud Guérin, Bernard Cosserant, Jean Sébastien Faure, Laure Calvet, Bruno Pereira, Dominique Guelon, Ousmane Traore, Laurent Gerbaud
OBJECTIVES: Ventilator-associated pneumonia (VAP) is the most frequent hospital-acquired infections in intensive care units (ICU). In the bundle of care to prevent the VAP, the oral care is very important strategies, to decrease the oropharyngeal bacterial colonization and presence of causative bacteria of VAP. In view of the paucity of medical economics studies, our objective was to determine the cost of implementing this oral care program for preventing VAP. MATERIALS AND METHODS: In five ICUs, during period 1, caregivers used a foam stick for oral care and, during period 2, a stick and tooth brushing with aspiration...
November 30, 2017: Clinical Oral Investigations
Milos Hadzi-Mihailovic, Renata Petrovic, Helene Raybaud, Dragan Stanimirovic, Meltem Ozar Koray
PURPOSE: Oral lichen planus (OLP) is an autoimmune skin and mucosal disorder. The range of malignant transformation in OLP varies between 0.1-3%. p53 is a tumor suppressor protein. Defective p53 could allow abnormal cells to proliferate, resulting in cancer. p53 plays an important role in cell cycle control and apoptosis and loss of p53 function has been demonstrated in about half of all human cancers. The purpose of the study was to investigate the malignant potential of OLP on the basis of p53 expression and to correlate p53 expression with clinical and histopathological features of OLP...
September 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
Prakash Muthusami, Timo Krings, Charles Raybaud, Peter Dirks, Manohar M Shroff
INTRODUCTION: Intracranial artery-to-artery antegrade revascularization is a poorly recognized entity, more so when it involves main stem arteries. The etiology, appearance, and significance of this condition are not described in the literature. CASE PRESENTATION: We describe a case of spontaneous revascularization of a chronically occluded middle cerebral arterial branch by collaterals from the proximal segment reconstituting distal flow, mimicking a brain arteriovenous malformation in a 9-year old boy...
November 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Virginie Raybaud, Sylvie Tambutté, Christine Ferrier-Pagès, Stéphanie Reynaud, Alexander A Venn, Éric Tambutté, Paul Nival, Denis Allemand
Critical to determining vulnerability or resilience of reef corals to Ocean Acidification (OA) is a clearer understanding of the extent to which corals can control carbonate chemistry in their Extracellular Calcifying Medium (ECM) where the CaCO3 skeleton is produced. Here, we employ a mathematical framework to calculate ECM aragonite saturation state (Ωarag.(ECM)) and carbonate system ion concentration using measurements of calcification rate, seawater characteristics (temperature, salinity and pH) and ECM pH (pH(ECM))...
May 3, 2017: Journal of Theoretical Biology
Jérôme Ory, Evelyne Raybaud, Russell Chabanne, Bernard Cosserant, Jean Sébastien Faure, Renaud Guérin, Laure Calvet, Bruno Pereira, Charline Mourgues, Dominique Guelon, Ousmane Traore
BACKGROUND: The quality of oral care is important in limiting the emergence of ventilator-associated pneumonia (VAP) in intubated patients. Our main objective was to measure the quality improvement in oral care following the implementation of a new oral care protocol. We also monitored VAP rates. MATERIAL/METHODS: This was a cohort study of patients in 5 adult ICUs covering different specialties. During period 1, caregivers used a foam stick for oral care and during period 2 a stick and tooth brushing with aspiration...
March 1, 2017: American Journal of Infection Control
G Raybaud, M Lambert, C Douillard, A F Dessein, S Morell-Dubois, M Guillou, S Haulon, P-Y Hatron
INTRODUCTION: Hyperhomocysteinemia is a biological marker that could be identified in the venous thrombotic events and rarely during acute arterial thrombotic events. The consequences can be serious. Effective diagnostic strategy is needed to optimize the management. CASE REPORT: Following bariatric surgery, a 40-year-old patient was admitted with an acute encephalopathy associated with peripheral lower limb arterial ischemia. The diagnostic work-up identified a major hyperhomocysteinemia whose causes were several...
December 2016: La Revue de Médecine Interne
Carlo Fornaini, Elisabetta Merigo, Jean-Paul Rocca, Giuseppe Lagori, Hélène Raybaud, Stefano Selleri, Annamaria Cucinotta
INTRODUCTION: Dental diode lasers were started to be used at the end of the 1990s and were shown to possess several important characteristics, such as small size and low cost, as well as the advantage of optic fibers delivering system. Although only two wavelengths (810 and 980 nm) had been the most used dental diode lasers, a wavelength emitting in the blue portion of the spectrum has recently been proposed. AIM: The aim of this ex vivo study was to compare the effectiveness of five different fiber-delivered laser wavelengths (450, 532, 808, 1064, and 1340 nm) in the oral soft tissue ablation...
October 1, 2016: Journal of Contemporary Dental Practice
Charles Raybaud
PURPOSE: The aims of this study are to analyze how the nature and the behavior of low-grade glial tumors (LGGT) in children may correlate with the anatomy of the cerebral hemispheres and to evaluate the consequent impact of diffusion tensor imaging (DTI) techniques in the presurgical assessment. METHODS: This is a combined review of a series of 155 cases of LGGT and of the recent literature on the subject. RESULTS: The cases retrieved from our data bank were divided in central hemispheric tumors (basal ganglia and thalami) (36 cases), glioneuronal cortical-based tumors (49 cases), and glial tumors of the cerebral mantle (70 cases)...
October 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Julia M Young, Benjamin R Morgan, Hilary E A Whyte, Wayne Lee, Mary Lou Smith, Charles Raybaud, Manohar M Shroff, John G Sled, Margot J Taylor
Identifying trajectories of early white matter development is important for understanding atypical brain development and impaired functional outcomes in children born very preterm (<32 weeks gestational age [GA]). In this study, 161 diffusion images were acquired in children born very preterm (median GA: 29 weeks) shortly following birth (75), term-equivalent (39), 2 years (18), and 4 years of age (29). Diffusion tensors were computed to obtain measures of fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD), which were aligned and averaged...
August 1, 2017: Cerebral Cortex
Andrea Poretti, Ramy Ashmawy, Tomas Garzon-Muvdi, George I Jallo, Thierry A G M Huisman, Charles Raybaud
Our understanding of cerebellar tonsillar herniation evolved over time and nowadays various pathomechanisms have been proposed. Causes of tonsillar herniation share a discrepancy between content (fore- and hindbrain) and container (supratentorial cranial vault, posterior fossa), may be associated with abnormalities of the craniocervical junction, and may have a developmental or acquired nature. In tonsillar herniation, the hindbrain is not malformed but deformed. Accordingly, "Chiari type 1 deformity," not "Chiari type 1 malformation" is the correct term to characterize primary tonsillar herniation...
October 2016: Neuropediatrics
Yordan Benhamou, Vincent Picco, Hélène Raybaud, Anne Sudaka, Emmanuel Chamorey, Sanja Brolih, Martino Monteverde, Marco Merlano, Cristiana Lo Nigro, Damien Ambrosetti, Gilles Pagès
Oral Squamous Cell Carcinoma (OSCC) is the most common oral cancer worldwide. Treatments including surgery, radio- and chemo-therapies mostly result in debilitating side effects. Thus, a more accurate evaluation of patients at risk of recurrence after radio/chemo treatment is important for preserving their quality of life. We assessed whether the Telomeric Repeat-binding Factor 2 (TERF2) influences tumor aggressiveness and treatment response. TERF2 is over-expressed in many cancers but its correlation to patient outcome remains controversial in OSCC...
July 12, 2016: Oncotarget
J-P Hammelin, G Cardon, M Reberolle, F Moulonguet, Y Neugebauer, G Raybaud, V Gnemmi, E Hachulla
INTRODUCTION: AA amyloidosis is a common but severe complication of many chronic inflammatory processes of infectious, autoimmune, or neoplastic origin. It frequently leads to renal damage, often presenting as a nephrotic syndrome. Giant cell arteritis is a common inflammatory arteritis in elderly people, but rarely complicated by AA amyloidosis. CASE REPORT: We report an 87-year-old female who presented with a nephrotic syndrome and a chronic inflammation, in whom the kidney biopsy showed secondary amyloidosis...
February 2017: La Revue de Médecine Interne
Charles Raybaud
No abstract text is available yet for this article.
July 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
M Gerin, G Jambon, A Fouque-Aubert, C Raybaud, P Cochat, O Claris, J Bacchetta
BACKGROUND: Bisphosphonates (BP) are sometimes used in children and young women, but their use requires expertise and caution due to the relative lack of long-term efficacy and safety data. CLINICAL CASES: We report on two dizygotic male twins with a past of mild prematurity who presented at the age of 2 months with moderate clinical craniotabes, hypophosphatemia, normal circulating calcium, severe hypercalciuria, and low parathyroid hormone levels. Following supplementation with oral phosphorus and native vitamin D, the clinical and biological abnormalities disappeared within 2 months...
September 2016: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
Julia Pavaine, Julia M Young, Benjamin R Morgan, Manohar Shroff, Charles Raybaud, Margot J Taylor
INTRODUCTION: The purpose of this study was to assess the impact of brain injury on white matter development and long-term outcomes in very preterm (VPT) neonates. METHODS: Eighty-five VPT neonates (born <32/40 weeks gestational age (GA)) scanned within 2 weeks of birth were divided into three groups based on the presence of perinatal cerebral injury: (i) no injury, (ii) mild/moderate injury and (iii) severe injury. Diffusion tensor imaging (DTI) was acquired for each neonate and fractional anisotropy (FA), and diffusivity measures were calculated in the posterior limb of the internal capsule (PLIC) and optic radiation (OR)...
March 2016: Neuroradiology
Aqeela H Al-Hashim, Susan Blaser, Charles Raybaud, Daune MacGregor
AIM: To study neuroradiological features in pediatric patients with corpus callosum abnormalities, using new functional subtyping for the corpus callosum, and to correlate the features with the clinical presentation. METHOD: We performed a retrospective review of 125 patients with radiologically identified abnormalities of the corpus callosum seen between 1999 and 2012. The study reviewed clinical features, genetic etiology, and chromosomal microarray (CMA) results...
May 2016: Developmental Medicine and Child Neurology
Wayne Lee, Hisham Al-Dossary, Charles Raybaud, Julia M Young, Benjamin R Morgan, Hilary E A Whyte, John G Sled, Margot J Taylor, Manohar M Shroff
PURPOSE: To measure cerebellar growth in a longitudinal cohort of very preterm infants to identify early predictors of subsequent brain growth. Although the cerebellum grows rapidly during late gestation, the rate and variability of growth following premature birth, and the effects of associated injury, are largely unknown. MATERIALS AND METHODS: In all, 105 very-preterm born infants (24-32 weeks GA) were imaged using magnetic resonance imaging (MRI) at birth, term-equivalent, 2, and 4 years of age...
June 2016: Journal of Magnetic Resonance Imaging: JMRI
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