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Perrin A, Morales RJ, Chapon F, Thèze C, Lacourt D, Pégeot P, Uro-Coste E, Giovannini D, Leboucq N, Mallaret M, Rigau V, Gaudon K, Richard P, Koenig M, Métay C, Cossée M. OTHER NMDs. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Allouche S, Schaeffer S, Chapon F. [Mitochondrial diseases in adults: An update]. Rev Med Interne 2021; 42:541-557. [PMID: 33455836 DOI: 10.1016/j.revmed.2020.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/24/2020] [Accepted: 12/25/2020] [Indexed: 10/22/2022]
Abstract
Mitochondrial diseases, characterized by a respiratory chain deficiency, are considered as rare genetic diseases but are the most frequent among inherited metabolic disorders. The complexity of their diagnosis is due to the dual control by the mitochondrial (mtDNA) and the nuclear DNA (nDNA), and to the heterogeneous clinical presentations; illegitimate association of symptoms should prompt the clinician to evoke a mitochondrial disorder. The goals of this review are to provide clinicians a better understanding of mitochondrial diseases in adults. After a brief overview on the mitochondrial origin and functions, especially their role in the energy metabolism, we will describe the genetic bases for mitochondrial diseases, then we will describe the various clinical presentations with the different affected tissues as well as the main symptoms encountered. Even if the new sequencing approaches have profoundly changed the diagnostic process, the brain imaging, the biological, the biochemical, and the histological explorations are still important highlighting the need for a multidisciplinary approach. While for most of the patients with a mitochondrial disease, only supportive and symptomatic therapies are available, recent advances in the understanding of the pathophysiological mechanisms have been made and new therapies are being developed and are evaluated in human clinical trials.
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Affiliation(s)
- S Allouche
- Laboratoire de biochimie, Centre Hospitalier et Universitaire, avenue côte de nacre, 14033 Caen cedex, France.
| | - S Schaeffer
- Centre de compétence des maladies neuromusculaires, Centre Hospitalier et Universitaire, avenue côte de nacre, 14033 Caen cedex, France
| | - F Chapon
- Centre de compétence des maladies neuromusculaires, Centre Hospitalier et Universitaire, avenue côte de nacre, 14033 Caen cedex, France
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Chtourou M, Schaeffer S, Chapon F, Allouche S. Mitochondrial DNA depletion and clinical presentations. Clin Chim Acta 2019. [DOI: 10.1016/j.cca.2019.03.1190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jonson PH, Palmio J, Johari M, Penttilä S, Evilä A, Nelson I, Bonne G, Wiart N, Meyer V, Boland A, Deleuze JF, Masson C, Stojkovic T, Chapon F, Romero NB, Solé G, Ferrer X, Ferreiro A, Hackman P, Richard I, Udd B. Novel mutations in DNAJB6
cause LGMD1D and distal myopathy in French families. Eur J Neurol 2018; 25:790-794. [DOI: 10.1111/ene.13598] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 01/19/2018] [Indexed: 01/24/2023]
Affiliation(s)
- P. H. Jonson
- Folkhälsan Institute of Genetics; University of Helsinki, Medicum; Helsinki Finland
| | - J. Palmio
- Neuromuscular Research Center; Tampere University Hospital; University of Tampere; Tampere Finland
| | - M. Johari
- Folkhälsan Institute of Genetics; University of Helsinki, Medicum; Helsinki Finland
| | - S. Penttilä
- Neuromuscular Research Center; Tampere University Hospital; University of Tampere; Tampere Finland
| | - A. Evilä
- Folkhälsan Institute of Genetics; University of Helsinki, Medicum; Helsinki Finland
| | - I. Nelson
- UPMC Univ Paris 06; INSERM UMRS 974; Center of Research in Myology; Institut de Myologie; Sorbonne Universités; Paris France
| | - G. Bonne
- UPMC Univ Paris 06; INSERM UMRS 974; Center of Research in Myology; Institut de Myologie; Sorbonne Universités; Paris France
| | - N. Wiart
- Centre National de Recherche en Génomique Humaine (CNRGH); CEA; Evry France
| | - V. Meyer
- Centre National de Recherche en Génomique Humaine (CNRGH); CEA; Evry France
| | - A. Boland
- Centre National de Recherche en Génomique Humaine (CNRGH); CEA; Evry France
| | - J.-F. Deleuze
- Centre National de Recherche en Génomique Humaine (CNRGH); CEA; Evry France
| | - C. Masson
- Bioinformatics Core Facility; INSERM US24/CNRS UMS3633; INSERM UMR 1163; Institut Imagine; Université Paris Descartes − Structure Fédérative de Recherche Necker; Paris France
| | - T. Stojkovic
- UPMC Univ Paris 06; INSERM UMRS 974; Center of Research in Myology; Institut de Myologie; Sorbonne Universités; Paris France
| | - F. Chapon
- INSERM U1075; Neuromuscular Competence Center; CHU Caen; Université de Normandie; Caen France
| | - N. B. Romero
- Unit of Neuromuscular Morphology; Institute of Myology; UPMC Paris 6; INSERM UMRS 974; Pitié-Salpêtrière Hospital; Paris France
| | - G. Solé
- Neuromuscular Reference Center; CHU Bordeaux; Bordeaux France
| | - X. Ferrer
- Neuromuscular Reference Center; CHU Bordeaux; Bordeaux France
| | - A. Ferreiro
- Unité de Biologie Fonctionnelle et Adaptative; Université Paris Diderot/CNRS; Paris France
- Reference Center for Neuromuscular Disorders; Pitié-Salpêtrière Hospital; AP-HP; Paris France
| | - P. Hackman
- Folkhälsan Institute of Genetics; University of Helsinki, Medicum; Helsinki Finland
| | - I. Richard
- Généthon INSERM; U951; INTEGRARE Research Unit; University Paris-Saclay; Evry France
| | - B. Udd
- Folkhälsan Institute of Genetics; University of Helsinki, Medicum; Helsinki Finland
- Neuromuscular Research Center; Tampere University Hospital; University of Tampere; Tampere Finland
- Department of Neurology; Vaasa Central Hospital; Vaasa Finland
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Stojkovic T, Bedat-Millet A, Chapon F, Malfatti E, Romero N, Brochier G, Laquerriere A, Penttila S, Jonson P, Palmio J, Hackman P, Udd B, Eymard B. A novel DNAJB6 mutation causing variable phenotypic expression: From distal myopathy to limb girdle muscular dystrophy. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Jonson P, Evilä A, Stojkovic T, Chapon F, Luque H, Hackman P, Udd B. A novel mutation in DNAJB6 causes LGMD1D in two French families. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Dilly D, Dolfus C, Zalcman EL, Chapon F, Parienti JJ, Derlon JM, Guillamo JS. Étude de la tomographie par emission de positons (TEP) à la C11 méthionine et de la mutation isocitrate déshydrogénase 1 (IDH1) comme facteurs pronostiques des oligodendrogliomes. Rev Neurol (Paris) 2014. [DOI: 10.1016/j.neurol.2014.01.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Périé S, Trollet C, Mouly V, Larghero J, Mamchaoui K, Bouazza B, Toy-Miou M, Marolleau J, Eymard B, Laforêt P, Chapon F, Butler-Browne G, Guily JLS. O01 Autologous cell therapy in oculopharyngeal muscular dystrophy (OPMD). Neuromuscul Disord 2014. [DOI: 10.1016/s0960-8966(14)00057-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Malfatti E, Schaeffer U, Chapon F, Yang Y, Eymard B, Xu R, Laporte J, Romero N. P.9.6 Combined cap disease and nemaline myopathy in the same patient caused by an autosomal dominant mutation in the TPM3 gene. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Simon J, Mouriaux F, Emery E, Chapon F. P.17.16 Enophthalmos and MELAS. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Simon JP, Debout C, Bertran F, Kerouanton A, Schaeffer S, Chapon F. Restless legs syndrome associated with exercise intolerance: Data from a retrospective observational clinical neuromuscular center study. Rev Neurol (Paris) 2013; 169:663-9. [PMID: 24011981 DOI: 10.1016/j.neurol.2013.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 04/26/2013] [Accepted: 05/23/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Exercise intolerance (EI) is a frequent motive for seeking neuromuscular consultation and may be a sign of metabolic disease or, rarely, muscular dystrophy. The diagnosis is not established in many patients with a typical clinical presentation. Nevertheless, some of them complain of sleep disorders and more especially of restless legs syndrome (RLS). OBJECTIVE The objective of our study was to estimate the frequency of RLS in patients presenting with EI. METHODS Our retrospective observational study included all patients seen in the center from 2005 to 2011, who were subsequently investigated for EI in the neuromuscular department of the Caen University hospital. Data were collected on clinical RLS and muscular investigations (creatine kinase [CK], EMG, maximal exercise tests magnetic resonance imaging [MRI] and muscle biopsy obtained along with muscle exploration). RESULTS Of the 318 patient records analyzed, 84 showed patients accurately complaining of EI. RLS was diagnosed in 25 of these patients (29.7%). This percentage was significantly higher (P<0.001) than found in the general population. Improvement was seen in 91.3% of the patients receiving specific treatment. CONCLUSION RLS can sometimes present with pain, potentially worsening with exercise, inappropriately leading to a hypothesis of EI. Clinicians should thus explore the possible diagnosis of RLS when a muscular disease is not found in patients presenting with such symptoms.
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Affiliation(s)
- J-P Simon
- Service de médecine physique et réadaptation, Côte de Nacre, centre de compétences des pathologies neuromusculaires, CHU de Caen, avenue de la Côte-de-Nacre, 14033 Caen cedex 9, France
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Laforêt P, Laloui K, Granger B, Hamroun D, Taouagh N, Hogrel JY, Orlikowski D, Bouhour F, Lacour A, Salort-Campana E, Penisson-Besnier I, Sacconi S, Zagnoli F, Chapon F, Eymard B, Desnuelle C, Pouget J. The French Pompe registry. Baseline characteristics of a cohort of 126 patients with adult Pompe disease. Rev Neurol (Paris) 2013; 169:595-602. [PMID: 24008051 DOI: 10.1016/j.neurol.2013.07.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 06/30/2013] [Accepted: 07/03/2013] [Indexed: 11/13/2022]
Abstract
Pompe disease is a rare autosomal recessive muscle lysosomal glycogenosis, characterised by limb-girdle muscle weakness and frequent respiratory involvement. The French Pompe registry was created in 2004 with the initial aim of studying the natural history of French patients with adult Pompe disease. Since the marketing in 2006 of enzyme replacement therapy (alglucosidase alfa, Myozyme(®)), the French Pompe registry has also been used to prospectively gather the biological and clinical follow-up data of all adult patients currently treated in France. This report describes the main clinical and molecular features, at the time of inclusion in the French registry, of 126 patients followed up in 21 hospital-based neuromuscular or metabolic centres. Sixty-five men and 61 women have been included in the registry. Median age at inclusion was 49 years, and the median age at onset of progressive limb weakness was 35 years. Fifty-five percent of the patients were walking without assistance, 24% were using a stick or a walking frame, and 21% were using a wheelchair. Forty-six percent of the patients needed ventilatory assistance, which was non-invasive in 35% of the cases. When performed, muscle biopsies showed specific features of Pompe disease in less than two-thirds of the cases, confirming the importance of acid alpha-glucosidase enzymatic assessment to establish the diagnosis. Molecular analysis detected the common c.-32-13T>G mutation, in at least one allele, in 90% of patients. The French Pompe registry is so far the largest country-based prospective study of patients with Pompe disease, and further analysis will be performed to study the impact of enzyme replacement therapy on the progression of the disease.
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Affiliation(s)
- P Laforêt
- Centre de référence de pathologie neuromusculaire Paris-Est, institut de myologie, groupe hospitalier Pitié-Salpêtrière, 47-83, boulevard de l'Hôpital, 75013 Paris, France.
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Riant F, Bergametti F, Fournier HD, Chapon F, Michalak-Provost S, Cecillon M, Lejeune P, Hosseini H, Choe C, Orth M, Bernreuther C, Boulday G, Denier C, Labauge P, Tournier-Lasserve E. CCM3 Mutations Are Associated with Early-Onset Cerebral Hemorrhage and Multiple Meningiomas. Mol Syndromol 2013; 4:165-72. [PMID: 23801932 DOI: 10.1159/000350042] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2013] [Indexed: 11/19/2022] Open
Abstract
Mutations of CCM3/PDCD10 cause 10-15% of hereditary cerebral cavernous malformations. The phenotypic characterization of CCM3-mutated patients has been hampered by the limited number of patients harboring a mutation in this gene. This is the first report on molecular and clinical features of a large cohort of CCM3 patients. Molecular screening for point mutations and deletions was used to identify 54 CCM3-mutated index patients. Age at referral and clinical onset, type of inaugural events and presence of extra-axial lesions were investigated in these 54 index patients and 22 of their mutated relatives. Mean age at clinical onset was 23.0 ± 16 years. Clinical onset occurred before 10 years in 26% of the patients, and cerebral hemorrhage was the initial presentation in 72% of these patients. Multiple extra-axial, dural-based lesions were detected in 7 unrelated patients. These lesions proved to be meningiomas in 3 patients who underwent neurosurgery and pathological examination. This 'multiple meningiomas' phenotype is not associated with a specific CCM3 mutation. Hence, CCM3 mutations are associated with a high risk of early-onset cerebral hemorrhage and with the presence of multiple meningiomas.
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Affiliation(s)
- F Riant
- Service de Génétique Neuro-Vasculaire, Assistance Publique-Hôpitaux de Paris, Paris, France ; Centre de Référence des Maladies Vasculaires Rares du Cerveau et de L'Œil, Groupe Hospitalier Lariboisière - Fernand Widal, Paris, France ; Unité Mixte de Recherche-S-740, Institut National de la Santé et de la Recherche Médicale, Paris, France ; Unité Mixte de Recherche-S-740, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
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Guillamo JS, Levallet G, Dugue A, Vital A, Diebold MD, Menei P, Colin P, Peruzzy P, Emery E, Bernaudin M, Chapon F, Lechapt-Zalcman E. O6-Methylguanine-DNA Methyltransferase (MGMT) Promoter Methylation and Low MGMT-Encoded Protein Expression as Prognostic Markers in Glioblastoma Patients Treated with Biodegradable Carmustine Wafer Implants after Initial Surgery Followed by Radiotherapy with Concomitant and Adjuvant Temozolomide (P06.004). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Fèvre-Montange M, Vasiljevic A, Frappaz D, Champier J, Szathmari A, Aubriot Lorton MH, Chapon F, Coulon A, Quintin Roué I, Delisle MB, Figarella-Branger D, Laquerrière A, Miquel C, Michiels JF, Péoch M, Polivka M, Fauchon F, Jouvet A. Utility of Ki67 immunostaining in the grading of pineal parenchymal tumours: a multicentre study. Neuropathol Appl Neurobiol 2012; 38:87-94. [PMID: 21696422 DOI: 10.1111/j.1365-2990.2011.01202.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIMS Pineal parenchymal tumours (PPTs) are rare neoplasms that are divided into pineocytoma (PC), pineoblastoma (PB) and PPT of intermediate differentiation (PPTID). Factors affecting the survival of patients with PPTs are morphological subtype and histological grading according to mitotic index and neurofilament immunostaining. Grading criteria to distinguish PPTIDs are difficult to define, particularly when using small specimens. The Ki67 labelling index (LI) might be helpful in distinguishing between grade II and III PPTIDs. Our study was performed to assess the predictive value of the Ki67 LI in a large cooperative series of PPTs and to evaluate whether inclusion of this data would improve and refine the World Health Organization classification. METHODS A retrospective analysis of 33 PPTs was performed. The histological features of the tumours were reviewed and Ki67 LI scoring was evaluated by immunohistochemistry. Data were correlated with the patients' survival. RESULTS The mean Ki67 LI was significantly different for tumour grades (0 in PC, 5.2 ± 0.4 in PPTID grade II, 11.2 ± 2.0 in PPTID grade III, 36.4 ± 6.2 in PB; P < 0.0001). However, there was no statistically significant difference in either overall or disease-free survival evaluated by the Kaplan-Meier method for patients with different grade tumours or Ki67 LI, possibly due to the different clinical management of patients in different centres. CONCLUSIONS The Ki67 LI may be a useful additional tool for grading PPTs, more particularly in small tumour samples.
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Affiliation(s)
- M Fèvre-Montange
- Inserm U1028, Centre de Recherche en Neurosciences, Equipe Neurooncologie et Neuroinflammation, Université de Lyon, France
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Brah S, Thomas G, Chapon F, Franques J, Jourde N, Harlé JR, Durand JM, Jean R, Chiche L. Hémorragies cérébro-méningées sur ruptures d’anévrismes inaugurales d’une vascularite cérébrale lupique. Rev Med Interne 2012; 33:e10-3. [DOI: 10.1016/j.revmed.2011.02.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 01/22/2011] [Accepted: 02/03/2011] [Indexed: 11/16/2022]
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Viola A, Confort-Gouny S, Schneider JF, Le Fur Y, Viout P, Chapon F, Pineau S, Cozzone PJ, Girard N. Is brain maturation comparable in fetuses and premature neonates at term equivalent age? AJNR Am J Neuroradiol 2011; 32:1451-8. [PMID: 21757528 DOI: 10.3174/ajnr.a2555] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Improved knowledge of brain maturation in fetuses and premature neonates is crucial for the early detection of pathologies and would help determine whether MR data from the premature brain might be used to evaluate fetal maturation. Using diffusion-weighted MR imaging and (1)H-MR spectroscopy, we compared cerebral microstructure and metabolism in normal in utero fetuses imaged near term and premature neonates imaged at term equivalent. MATERIALS AND METHODS Forty-eight subjects were investigated: 24 in utero fetuses (mean gestational age, 37 ± 1 weeks) and 24 premature neonates (mean postconceptional age, 37 ± 1 weeks). ADC values were measured in cerebellum, pons, white matter, brain stem, basal ganglia, and thalamus. MR spectroscopy was performed in deep white matter. RESULTS Mean ADC values from fetuses and premature neonates were comparable except for the pons and the parietal white matter. ADC values were lower in the pons of premature neonates, whereas greater values were found in their parietal white matter compared with fetuses. Proton MR spectroscopy showed higher levels of NAA/H(2)O, Glx/H(2)O, tCr/H(2)O, and mIns/H(2)O in premature neonates compared with fetuses. CONCLUSIONS Our study provides evidence of subtle anomalies in the parietal white matter of healthy premature neonates. In addition, the reduced ADC values in the pons together with the increased levels of NAA/H(2)O, tCr/H(2)O, and Glx/H(2)O in the centrum semiovale suggest a more advanced maturation in some white matter regions. Our results indicate that MR data from the premature brain are not appropriate for the assessment of the fetal brain maturation.
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Affiliation(s)
- A Viola
- Centre de Résonance Magnétique Biologique et Médicale Unité Mixte de Recherche-Centre National de la Recherche Scientifique, Faculté de Médecine, Université de la Méditerranée, Marseille, France
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Constans JM, Collet S, Kauffmann F, Hossu G, Dou W, Ruan S, Rioult F, Derlon JM, Lechapt-Zalcmann E, Chapon F, Valable S, Théron J, Guillamo JS, Courthéoux P. Five-Year Longitudinal MRI Follow-up and (1)H Single Voxel MRS in 14 patients with Gliomatosis Treated with Temodal, Radiotherapy and Antiangiogenic Therapy. Neuroradiol J 2011; 24:401-14. [PMID: 24059663 DOI: 10.1177/197140091102400309] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 01/03/2011] [Indexed: 11/15/2022] Open
Abstract
Gliomatosis cerebri (GC) is a challenging tumor, considered to have a poor prognosis and poor response to treatments. The purpose of this study is to better understand glial tumor metabolism and post chemotherapy, radiotherapy and antiangiogenic variations in a longitudinal study to determine cerebral variation in MRS area, amplitude, and ratios of metabolites and spectral profiles during a five year longitudinal follow-up in 14 patients with gliomatosis without initial hyperperfusion and treated with chemotherapy (Temozolomide (Temodal(®))), radiotherapy and subsequent antiangiogenic therapy. The study also aimed to detect changes in infiltration, proliferation, lipids or glycolytic metabolism, as these changes could be monitored longitudinally in humans with glial brain tumors (low and high grade) after therapy, using conventional magnetic resonance imaging (MRI), spectroscopy (MRS) and MR perfusion. Most patients had first initial clinical and MRS improvement and stable MRI. After 12 to 24 chemotherapy treatment cycles MRS usually showed an increase in the Cho/Cr ratio (proliferation) and sometimes contrast enhancements. Later, the patients showed clinical deterioration and radiotherapy was started. There was an improvement with radiotherapy that lasted nine to 18 months. This was followed by a worsening that led to try antiangiogenic therapy. Later in the evolution for three patients with hyperperfusion this symptom disappeared, but proliferation, infiltration and glycolytic metabolism remained at a high level. Spectroscopic and metabolic changes often occur well before clinical deterioration and sometimes before improvement. Therefore, MRS could be more sensitive and could detect changes earlier than MRI and is sometimes predictive. Despite the difficulty, the variability and unknown factors, these repeated measurements give us a better insight into the nature of the different processes, tumor progression and could lead to better understanding of therapeutic response.
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Affiliation(s)
- J M Constans
- CHU Caen; Caen, France - Cervoxy, UMR 6232 CI-NAPS, CNRS, CEA Basse Normandie Caen University, Centre CYCERON; Caen, France -
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Lechapt-Zalcman E, Chapon F, Guillamo JS, Khouri S, Menegalli-Boggelli D, Loussouarn D, Fevre-Montange M, Jouvet A. Scientific correspondence. Neuropathol Appl Neurobiol 2011; 37:431-5. [DOI: 10.1111/j.1365-2990.2010.01133.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sacconi S, Piraud M, Echaniz-Laguna A, Tranchant C, Boutte C, Nadaj A, Penisson-Besnier I, Bouhour F, Gervais H, Petiot P, Manel V, Gallard J, Salort-Campana E, Solé G, Pages M, Echenne B, Fourquet I, Lacour A, Feasson L, Magot A, Chabrol B, Chapon F, Clavelou P, Martinez E, Baëz E, Laforêt P, Pouget J, Desnuelle C. Current French Pompe Prevalence Study (French PoPS). Clin Ther 2011. [DOI: 10.1016/j.clinthera.2011.05.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Degoul F, Diry M, Viader F, Boitier E, Marsac C, Eymard B, Romero N, Delisle MB, Lechevalier B, Chapon F. Intrafamilial heterogeneous clinical presentation of the mitochondrial 3243 MELAS mutation; molecular investigations among four generations. Eur J Neurol 2011; 2:573-9. [DOI: 10.1111/j.1468-1331.1995.tb00177.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Brah S, Thomas G, Chapon F, Brescianini A, Lanfranchi MA, Saadi S, Harle JR, Durand JM, Jean R, Chiche L. Vascularité cérébrale lupique : à propos d’un cas révélé par hémorragie cérébro-méningée sur rupture d’anévrisme inaugurale. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Thomas G, Guedj E, Savini H, Chapon F, Barlesi F, Kaphan E, Durand JM, Harle JR, Didelot A, Chiche L. Intérêt du PET-scan cérébral dans le diagnostic des syndromes paranéoplasiques neurologiques : à propos d’un cas. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Chiche L, Mazodier K, Genot S, Barberet M, Pineau S, Chapon F, Bensa P, Fuentes S, Allègre T, Harlé JR, Kaplanski G, Seux V. [Confusion in a 60-year-old man]. Rev Med Interne 2010; 31:867-71. [PMID: 21030116 DOI: 10.1016/j.revmed.2010.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2010] [Accepted: 09/22/2010] [Indexed: 10/18/2022]
Affiliation(s)
- L Chiche
- Service de médecine interne, hôpital la Conception, 147, boulevard Baille, 13005 Marseille, France
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Faivre A, Chapon F, Combaz X, Nicoli F. INTERNAL CAROTID ARTERY DISSECTION OCCURRING DURING INTENSIVE PRACTICE WITH WII(R) VIDEO SPORTS GAMES. Neurology 2009; 73:1242-3. [DOI: 10.1212/wnl.0b013e3181bc0172] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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26
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Sacconi S, Simkin D, Arrighi N, Chapon F, Larroque MM, Vicart S, Sternberg D, Fontaine B, Barhanin J, Desnuelle C, Bendahhou S. Mechanisms underlying Andersen's syndrome pathology in skeletal muscle are revealed in human myotubes. Am J Physiol Cell Physiol 2009; 297:C876-85. [DOI: 10.1152/ajpcell.00519.2008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Andersen's syndrome is a rare disorder that has been defined with a triad: periodic paralysis, cardiac arrhythmia, and development anomalies. Muscle weakness has been reported in two-thirds of the patients. KCNJ2 remains the only gene linked to Andersen's syndrome; this gene encodes for the α-subunit of the strong inward-rectifier K+ channel Kir2.1. Several studies have shown that Andersen's syndrome mutations lead to a loss of function of the K+ channel activity in vitro. However, ex vivo studies on isolated patient muscle tissue have not been reported. We have performed muscle biopsies of controls and patients presenting with clinically and genetically defined Andersen's syndrome disorder. Myoblasts were cultured and characterized morphologically and functionally using the whole cell patch-clamp technique. No morphological difference was observed between Andersen's syndrome and control myoblasts at each passage of the cell culture. Cellular proliferation and viability were quantified in parallel with direct cell counts and showed no difference between control and Andersen's syndrome patients. Moreover, our data show no significant difference in myoblast fusion index among Andersen's syndrome and control patients. Current recordings carried out on myotubes revealed the absence of an inwardly rectifying Ba2+-sensitive current in affected patient cells. One consequence of the Ik1 current loss in Andersen's syndrome myotubes is a shift of the resting membrane potential toward depolarizing potentials. Our data describe for the first time the functional consequences of Andersen's syndrome mutations ex vivo and provide clues to the K+ channel pathophysiology in skeletal muscle.
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Affiliation(s)
- S. Sacconi
- Centre Hospitalier Universitaire of Nice, Centre de Référence Maladies Neuromusculaires et Sclérose Latérale Amyotrophique, Institut National de la Santé et de la Recherche Médicale Unité 638, Institut Fédératif de Recherche 50, Nice
| | - D. Simkin
- University of Nice Sophia Antipolis, Transport Ionique Aspects Normaux et Pathologiques, Formation de Recherche en Evolution 3093 Centre National de la Recherche Scientifique, Parc Valrose, Nice
| | - N. Arrighi
- Centre Hospitalier Universitaire of Nice, Centre de Référence Maladies Neuromusculaires et Sclérose Latérale Amyotrophique, Institut National de la Santé et de la Recherche Médicale Unité 638, Institut Fédératif de Recherche 50, Nice
| | - F. Chapon
- Centre Hospitalier Universitaire of Caen, Service de Neurologie et Laboratoire de Neuropathologie, Caen
| | - M. M. Larroque
- University of Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Unité Mixte de Recherche 6097 Centre National de la Recherche Scientifique, Sophia Antipolis, Valbonne
| | - S. Vicart
- Centre de Référence des Canalopathies Musculaires, Fédération des Maladies du Système Nerveux; Université Pierre et Marie Curie, Unité Mixte de Recherche S546; Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 546, Paris; and
| | - D. Sternberg
- Biochemistry and Genetics, Hôpital Pitié-Salpêtrière, Assistance Publique, Hôpitaux de Paris, and Unité Mixte de Recherche 546, Université Pierre et Marie Curie and Institut National de la Santé et de la Recherche Médicale, Paris, France
| | - B. Fontaine
- Centre de Référence des Canalopathies Musculaires, Fédération des Maladies du Système Nerveux; Université Pierre et Marie Curie, Unité Mixte de Recherche S546; Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 546, Paris; and
| | - J. Barhanin
- University of Nice Sophia Antipolis, Transport Ionique Aspects Normaux et Pathologiques, Formation de Recherche en Evolution 3093 Centre National de la Recherche Scientifique, Parc Valrose, Nice
| | - C. Desnuelle
- Centre Hospitalier Universitaire of Nice, Centre de Référence Maladies Neuromusculaires et Sclérose Latérale Amyotrophique, Institut National de la Santé et de la Recherche Médicale Unité 638, Institut Fédératif de Recherche 50, Nice
| | - S. Bendahhou
- University of Nice Sophia Antipolis, Transport Ionique Aspects Normaux et Pathologiques, Formation de Recherche en Evolution 3093 Centre National de la Recherche Scientifique, Parc Valrose, Nice
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Bertrand A, Brandel JP, Grignon Y, Sazdovitch V, Seilhean D, Faucheux B, Privat N, Brault JL, Vital A, Uro-Coste E, Pluot M, Chapon F, Maurage CA, Letournel F, Vespignani H, Place G, Degos CF, Peoc’h K, Haïk S, Hauw JJ. Wernicke encephalopathy and Creutzfeldt-Jakob disease. J Neurol 2009; 256:904-9. [DOI: 10.1007/s00415-009-5038-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2008] [Revised: 01/07/2009] [Accepted: 01/28/2009] [Indexed: 11/30/2022]
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Combaz X, Girard N, Scavarda D, Chapon F, Pineau S, Levrier O, Viout P, Confort-Gouny S. Imagerie des tumeurs cérébrales de l’enfant. J Neuroradiol 2008; 35:261-7. [DOI: 10.1016/j.neurad.2008.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2007] [Accepted: 03/05/2008] [Indexed: 10/22/2022]
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29
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Chapon F, Gartioux C, Ledeuil C, Demay L, Brinas L, Herlicoviez D, Allouche S, Ferreiro A, Leturcq F, Richard P, Allamand V, Bonne G. G.P.1.03 Important variability in clinical severity in a family with Col VI-related myopathy: Potential implication of digenism? Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Schneider JF, Confort-Gouny S, Viola A, Le Fur Y, Viout P, Bennathan M, Chapon F, Figarella-Branger D, Cozzone P, Girard N. Multiparametric differentiation of posterior fossa tumors in children using diffusion-weighted imaging and short echo-time 1H-MR spectroscopy. J Magn Reson Imaging 2008; 26:1390-8. [PMID: 17968955 DOI: 10.1002/jmri.21185] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To assess the combined value of diffusion-weighted imaging (DWI) and proton magnetic resonance spectroscopy (1H-MRS) in differentiating medulloblastoma, ependymoma, pilocytic astrocytoma, and infiltrating glioma in a pediatric population. MATERIALS AND METHODS A total of 17 children with untreated posterior fossa tumors (seven medulloblastoma, four infiltrating glioma, two ependymoma, and four pilocytic astrocytoma), were investigated with conventional MRI, DWI, and MRS using a single-voxel technique. Within the nonnecrotic tumor core, apparent diffusion coefficient (ADC) values using a standardized region of interest (ROI) were retrieved. Quantification of water signal and analysis of metabolite signals from MRS measurements in the same tumorous area were reviewed using multivariant linear discriminant analysis. RESULTS Combination of ADC values and metabolites, which were normalized using water as an internal standard, allowed discrimination between the four tumor groups with a likelihood below 1 x 10(-9). Positive predictive value was 1 in all cases. Tumors could not be discriminated when using metabolite ratios or ADC values alone, nor could they be differentiated using creatine (Cr) as an internal reference even in combination with ADC values. CONCLUSION Linear discriminant analysis using DWI and MRS using water as internal reference, fully discriminates the four most frequent posterior fossa tumors in children.
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Affiliation(s)
- J F Schneider
- Department of Pediatric Radiology, University Children's Hospital Universitäts Kinderspital beider Basel, Basel, Switzerland.
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31
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Lrhezzioui J, Emery E, Chapon F. [Frontal giant cell glioblastoma: radio-induced tumor? Case report and literature review]. Neurochirurgie 2007; 53:486-90. [PMID: 18061629 DOI: 10.1016/j.neuchi.2007.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Accepted: 08/02/2007] [Indexed: 10/22/2022]
Abstract
The current WHO classification recognizes two distinct variants of glioblastoma multiforme (GBMs): giant cell glioblastoma (GCG) and gliosarcoma, based on histological heterogeneity. Unlike conventional GBMs, GCGs preferentially occur in younger individuals and are associated with a better prognosis, a few reports documenting prolonged survival up to 17 years after diagnosis. However, transformation to gliosarcoma is possible and has been already reported. Radio-induced glioblastoma, which meets Cahan's criteria for radio-induced tumor, is very rare; the first case was published by Kleriga et al. We report a rare case observed in a 46-year-old man with a past history of right nose leiomyosarcoma treated 40 years earlier by surgery and interstitial and external beam radiation. At admission, the patient presented left hemiparesis revealing a right frontal GCG confirmed by pathology after cranial surgery. We describe this case firstly because of its rare histological variety and discuss its clinical, radiological, histopathological, therapeutic and prognostic characteristics with literature data. Secondly, because of its occurrence 40 years after external radiotherapy, which could suggest the hypothesis of radio-induced glioblastoma.
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Affiliation(s)
- J Lrhezzioui
- Service de neurochirurgie, CHU de Caen, avenue de la Côte-de-Nacre, 14033 Caen cedex 5, France.
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32
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Krahn M, Pécheux C, Chapon F, Béroud C, Drouin-Garraud V, Laforet P, Romero NB, Penisson-Besnier I, Bernard R, Urtizberea JA, Leturcq F, Lévy N. Transcriptional explorations of CAPN3 identify novel splicing mutations, a large-sized genomic deletion and evidence for messenger RNA decay. Clin Genet 2007; 72:582-92. [PMID: 17979987 DOI: 10.1111/j.1399-0004.2007.00906.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mutations in the gene encoding calpain-3 (CAPN3) cause autosomal recessive limb-girdle muscular dystrophy type 2A (LGMD2A) and idiopathic eosinophilic myositis. Accurate diagnosis and genetic counselling are based on the identification of disease-causing mutations on both alleles of CAPN3 in the patients. In the present study, we used transcriptional analysis as a complementary approach for patients suspected of being affected with LGMD2A, in whom initial denaturing high-performance liquid chromatography genomic mutation screening evidenced no or only one CAPN3 mutation obviously considered as disease causing. This allowed to identify and characterize cDNA deletions. Further genomic analysis allowed to determine the origin of these deletions, either as splicing defects caused by intronic mutations or as an internal multi-exonic deletion. In particular, we report two novel CAPN3 mutations (c.1745 + 4_1745 + 7delAGTG in IVS13 and c.2185-16A>G in IVS20) and a recurrent large-sized genomic deletion including exons 2-8 for which genomic breakpoints have been characterized. In addition, our results indicate nonsense-mediated messenger RNA decay as a mechanism for under-expression of CAPN3 associated to some specific variations.
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Affiliation(s)
- M Krahn
- Département de Génétique Médicale, Hôpital d'enfants de la Timone, Marseille, France
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33
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Abstract
Neonatal brain disorders consist of a wide chapter including brain malformations, hypoxic-ischemic encephalopathy (HIE), intracranial infections, perinatal trauma and metabolic encephalopathy. We will focus here on HIE, intracranial infections (especially materno-fetal infection with or without prolonged and/or premature rupture of membranes) and metabolic encephalopathy, those three conditions being the most frequent so far in our experience. Neonatal stroke is also analyzed. Moreover minor perinatal events might be superimposed on an already damaged (infective, edematous, metabolically abnormal or maldeveloped) brain, highlighting the main role and potential benefits of neuroimaging during the neonatal period. The different methods of brain imaging are thus reported with their advantages and disadvantages.
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Affiliation(s)
- N Girard
- Department of Neuroradiology Diagnostique and Interventionnelle, hôpital Timone, université de la Méditerranée, 264 rue Saint-Pierre, 13005 Marseille, France.
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Abstract
Magnetic resonance imaging (MRI) is the imaging tool of choice to evaluate brain maturation and especially brain myelination. Magnetic resonance imaging also provides functional insight through diffusion images and proton spectroscopy. In this review the MRI techniques are analyzed for both pre- and postnatal periods. The origin of MR signal changes is also detailed in order to understand normal myelination evolution and the consequences on brain maturation of the different pathologies encountered prior and after birth. Because MRI is "blind" in terms of signal on conventional sequences after 2 years of age, a particular attention is given to diffusion images and proton spectroscopy of the developing brain.
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Affiliation(s)
- N Girard
- Department of Neuroradiology, hôpital de la Timone, université de la Méditerranée, Marseille, France.
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35
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Coulbault L, Deslandes B, Herlicoviez D, Read MH, Leporrier N, Schaeffer S, Mouadil A, Lombès A, Chapon F, Jauzac P, Allouche S. A novel mutation 3090 G>A of the mitochondrial 16S ribosomal RNA associated with myopathy. Biochem Biophys Res Commun 2007; 362:601-5. [PMID: 17761147 DOI: 10.1016/j.bbrc.2007.08.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Accepted: 08/02/2007] [Indexed: 10/22/2022]
Abstract
We describe a young woman who presented with a progressive myopathy since the age of 9. Spectrophotometric analysis of the respiratory chain in muscle tissue revealed combined and profound complex I, III, II+III, and IV deficiency ranging from 60% to 95% associated with morphological and histochemical abnormalities of the muscle. An exhaustive screening of mitochondrial transfer and ribosomal RNAs showed a novel G>A substitution at nucleotide position 3090 which was detected only in urine sediment and muscle of the patient and was not found in her mother's blood cells and urine sample. We suggest that this novel de novo mutation in the 16S ribosomal RNA, a nucleotide which is highly conserved in different species, would impair mitochondrial protein synthesis and would cause a severe myopathy.
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Affiliation(s)
- L Coulbault
- Laboratoire de Biochimie, Centre Hospitalier et Universitaire de Caen, Avenue Côte de Nacre, 14033 Caen cedex, France
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36
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Figarella-Branger D, Metellus P, Barrié M, Maues de Paula A, Fernandez C, Polivka M, Vital A, Labrousse F, Vignaud JM, Laquerrière A, Rousselet MC, Lacroix C, Saikali S, Chapon F, Gontier MF, Chrétien F, Babin P, Rigau V, Vandenbos F, Peoc'h M, Kujas M, Chinot O, Gouvernet J, Giorgi R, Guyotat J, Jouvet A. Épendymomes intracrâniens de l'adulte. Diagnostic histologique et facteurs histopronostiques. Neurochirurgie 2007; 53:76-84. [PMID: 17445840 DOI: 10.1016/j.neuchi.2006.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Accepted: 11/29/2006] [Indexed: 11/22/2022]
Abstract
BACKGROUND Intracranial ependymomas are rare in adults and histopathological prognostic factors are poorly determined. PURPOSE A retrospective multicentric study was conducted in France in order to assess the prognostic value of histology. MATERIAL Between 1990 and 2004, 216 adult patients with newly diagnosed ependymomas were treated in 19 French centers. Eligibility required institutional histopathological confirmation of an ependymoma and available clinical history and MRI features (see comparison paper). METHODS Histological preparations and one paraffin embedded block from each patient were sent to Pr D. Figarella-Branger in Marseille. Central review by four neuropathologists (D. Figarella-Branger, A. Maues de Paula, C. Fernandez and A. Jouvet) was performed. Specimens for which all pathologists agreed with the histological diagnosis of ependymomas were included, whereas cases for which all disagree were excluded and reclassified. In the event of doubt and/or discrepancies between pathologists immunostaining was performed in order to reach a consensus diagnosis. Diagnostic of ependymomas was confirmed in 121 cases (56%). In theses cases, ependymomas were classified according to the WHO system (subtype and grade). The potential prognostic value (overall survival OS and disease free survival DFS) of the following histological parameters was examined: perivascular pseudorosettes, ependymal rosettes, hyalinized vessels, mitotic index, microvascular proliferation, necrosis, area of increased cellularity, nuclear atypia, brain invasion and Mib-1 labelling index. RESULTS Among the 121 ependymomas, 88 were grade II (47 classic, 17 cellular, 2 papillar, 6 clear cells and 16 tanicytic) and 33 grade III. WHO grading, occurrence of microvascular proliferation, necrosis, nuclear atypia and high proliferative index were correlated with both OS and DFS. Moreover, quantification of certain parameters enabled a reproducible grading system correlated with both OS and DFS.
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Affiliation(s)
- D Figarella-Branger
- Service d'anatomie pathologique et de neuropathologie, hôpital de la Timone, 264, rue Saint-Pierre, 13385 Marseille cedex 05, France.
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Abstract
PURPOSE Neuroimaging findings in Duane's retraction syndrome (DRS), through magnetic resonance imaging (MRI), suggest that aplasia of the abducens nerve (VI) can be responsible for several forms of DRS. METHODS Brain MRI was performed in two children of 2.5 and 7 years of age with left sided DRS type II and right sided DRS type I, respectively. 3D T2 weighted images through the brainstem were acquired in order to visualize the cranial nerves especially the abducens (VI) and oculomotor (III) nerves. RESULTS The abducens nerve on the affected side could not be observed in these two different types of DRS with normal morphology of the third nerves. CONCLUSION Absence of the VI nerve has been described recently in DRS types I and III only, while DRS type II is usually associated with normal VI nerve on MRI. However our results show that aplasia of the VI nerve can also be seen in DRS type II resulting in new insight of the pathogenesis of this clinical entity.
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Affiliation(s)
- D Denis
- Department of Ophthalmology, North's Hospital, Marseille, France
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38
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Schneider JF, Confort-Gouny S, Le Fur Y, Viout P, Bennathan M, Chapon F, Fogliarini C, Cozzone P, Girard N. Diffusion-weighted imaging in normal fetal brain maturation. Eur Radiol 2007; 17:2422-9. [PMID: 17404738 DOI: 10.1007/s00330-007-0634-x] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Revised: 02/13/2007] [Accepted: 03/09/2007] [Indexed: 10/23/2022]
Abstract
Diffusion-weighted imaging (DWI) provides information about tissue maturation not seen on conventional magnetic resonance imaging. The aim of this study is to analyze the evolution over time of the apparent diffusion coefficient (ADC) of normal fetal brain in utero. DWI was performed on 78 fetuses, ranging from 23 to 37 gestational weeks (GW). All children showed at follow-up a normal neurological evaluation. ADC values were obtained in the deep white matter (DWM) of the centrum semiovale, the frontal, parietal, occipital and temporal lobe, in the cerebellar hemisphere, the brainstem, the basal ganglia (BG) and the thalamus. Mean ADC values in supratentorial DWM areas (1.68 +/- 0.05 mm(2)/s) were higher compared with the cerebellar hemisphere (1.25 +/- 0.06 mm(2)/s) and lowest in the pons (1.11 +/- 0.05 mm(2)/s). Thalamus and BG showed intermediate values (1.25 +/- 0.04 mm(2)/s). Brainstem, cerebellar hemisphere and thalamus showed a linear negative correlation with gestational age. Supratentorial areas revealed an increase in ADC values, followed by a decrease after the 30th GW. This study provides a normative data set that allows insights in the normal fetal brain maturation in utero, which has not yet been observed in previous studies on premature babies.
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Affiliation(s)
- J F Schneider
- Department of Pediatric Radiology, University Children's Hospital UKBB, Basel, Switzerland.
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Papin F, Clarot F, Vicomte C, Gaulier JM, Daubin C, Chapon F, Vaz E, Proust B. Lethal paradoxical cerebral vein thrombosis due to suspicious anticoagulant rodenticide intoxication with chlorophacinone. Forensic Sci Int 2007; 166:85-90. [PMID: 16716547 DOI: 10.1016/j.forsciint.2006.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2006] [Revised: 04/04/2006] [Accepted: 04/09/2006] [Indexed: 10/24/2022]
Abstract
Superwarfarin exposure is a growing health problem, described in many countries. The authors report a case of suspicious chlorophacinone poisoning with a problematic diagnosis. They review the literature and discuss particularities of anticoagulant rodenticide intoxication, as well as the apparent contradiction between anticoagulant intoxication and lethal thrombosis.
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Affiliation(s)
- F Papin
- Forensic Department, Caen University Hospital, Caen, France
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40
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Schneider JF, Viola A, Confort-Gouny S, Ayunts K, Le Fur Y, Viout P, Bennathan M, Chapon F, Figarella-Branger D, Cozzone P, Girard N. Infratentorial pediatric brain tumors: the value of new imaging modalities. J Neuroradiol 2007; 34:49-58. [PMID: 17316798 DOI: 10.1016/j.neurad.2007.01.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The correct assessment of the four most frequent infratentorial brain tumors in children (medulloblastoma, ependymoma, pilocytic astrocytoma and infiltrating glioma) has always been problematic. They are known to often resemble one another on conventional magnetic resonance (MR) imaging. We tested the hypothesis whether the combined strength of diffusion-weighted imaging (DWI) and proton MR spectroscopy (MRS) could help differentiate these tumors. Seventeen children with untreated posterior fossa tumors were investigated between January 2005 and January 2006 with conventional MR imaging and combined DWI and MR spectroscopy using a single-voxel technique at short and long echo time (TE) of 30 ms and 135 ms respectively. Apparent diffusion coefficient (ADC) values were retrieved after regions of interest were manually positioned within non necrotic tumor core. Water signal was quantified and metabolite signals were compared and analyzed using linear discriminant analysis. When a combination of ADC values and normalized metabolites was used, all tumors could be discriminated against one other. This could only be achieved when metabolites were normalized using water as an internal standard. They could not be discriminated when using metabolite ratios or ADC values alone, nor could they be differentiated using creatine (Cr) as an internal reference even in combination with ADC values. In conclusion, linear discriminant analysis and multiparametric combination of DWI and MRS, although not replacing histology, fully discriminates the four most frequent posterior fossa tumors in children, but metabolites have to be normalized using water and not Cr signal as an internal reference.
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Affiliation(s)
- J F Schneider
- Centre de résonance magnétique biologique et médicale, UMR-CNRS 6612, faculté de médecine, université de la Méditerranée, Marseille, France.
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41
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Girard N, Fogliarini C, Viola A, Confort-Gouny S, Le Fur Y, Viout P, Chapon F, Levrier O, Cozzone P. Magnetic resonance spectroscopy of normal and impaired fetal brain development. Clin Imaging 2006. [DOI: 10.1016/j.clinimag.2006.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fogliarini C, Chaumoitre K, Chapon F, Fernandez C, Lévrier O, Figarella-Branger D, Girard N. Assessment of cortical maturation with prenatal MRI. Clin Imaging 2006. [DOI: 10.1016/j.clinimag.2005.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Levrier O, Serratrice J, Benathan M, Chapon F, Weiller PJ, Girard N. P-07 - IRM de très haute résolution pour l’exploration de la paroi de l’artère temporale superficielle dans le cadre des artérites à cellules géantes. J Neuroradiol 2006. [DOI: 10.1016/s0150-9861(06)77190-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bennathan M, Levrier O, Chapon F, Cozzone P, Girard N. CO-02 - Intérêt de la spectrométrie de proton et de l’imagerie de diffusion pour l’étude des tumeurs cérébrales en pédiatrie. J Neuroradiol 2006. [DOI: 10.1016/s0150-9861(06)77122-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Metabolic imaging with positron emission tomography (PET) provides, in neuro-oncology, information complementary to that provided by anatomic imaging obtained with CT-scanner or MRI. Only a few publications have yet reported its use in oligodendroglial tumors. These findings and partial results obtained in ongoing work, suggest some preliminary conclusions: 11C-MET (L-methyl-methionine) is a more appropriate tracer than 18F-FDG (fluoro-deoxy-glucose), in terms of both specificity and sensitivity, for the assessment of patients with this category of tumor. PET/MET allows differentiation between grade II and grade III oligodendrogliomas; better targeting for stereotactic biopsy; more accurate assessment of the post-operative residual tumor; identification of progression from low-grade to anaplastic grade during the disease course; differentiation between recurrence and a post-radiation processes. PET/MET allows, to some extent, prediction of response to radiotherapy; and, probably, to chemotherapy.
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Loyant V, Jaffré A, Breton J, Baldi I, Vital A, Chapon F, Dutoit S, Lecluse Y, Loiseau H, Lebailly P, Gauduchon P. Screening of TP53 mutations by DHPLC and sequencing in brain tumours from patients with an occupational exposure to pesticides or organic solvents. Mutagenesis 2005; 20:365-73. [PMID: 16105905 DOI: 10.1093/mutage/gei052] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The aetiology of brain tumours remains unclear. Occupational exposures to pesticides and organic solvents are suspected risk factors. The case-control study CEREPHY (221 cases, 442 controls) carried in the Departement de la Gironde in France revealed a significantly increased risk of brain tumours for subjects most exposed to pesticides. In some cancers, TP53 mutations could reflect exposure to specific carcinogens. These mutations are present in approximately 30% of astrocytic brain tumours. In a pilot study, we explored the hypothesis that pesticide or solvent exposure could raise the frequency of TP53 mutations in brain tumour cells. We investigated TP53 mutations in exons 2-11 by denaturing high performance liquid chromatography (DHPLC) and sequencing, and p53 accumulation by immunohistochemistry in brain tumour of the 30 patients from CEREPHY study with a history of occupational exposure to pesticides (n = 21) and/or organic solvents (n = 14) for whom tumoral tissue was available. Included cases concerned 27% of CEREPHY cases exposed to pesticides and, based on the cumulative index of occupational exposure, they were more exposed to pesticides. There were 12 gliomas, 6 meningiomas, 7 neurinomas, 2 central nervous system lymphomas and 3 tumours of other histological types. We detected TP53 mutations in three tumours, which is similar to the expected number (3.3) calculated from 46 published studies referenced in the IARC TP53 mutations database, taking into account histological types. Considering TP53 mutations previously detected in the laboratory by DHPLC and the frequency of TP53 polymorphisms detected in this sample (similar to published data), the TP53 mutations rate is probably not underestimated. These preliminary results, even if it was on a limited number of tumours, are not in favour of the role of pesticide or organic solvent exposure in the occurrence of TP53 mutations in brain tumours.
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Affiliation(s)
- V Loyant
- Groupe Régional d'Etudes sur le Cancer, Université de Caen Basse-Normandie, Centre François Baclesse, Avenue du Général Harris, BP5026, 14076 Caen Cedex 05, France.
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Vidal V, Amabile P, Jacquier A, Pascal T, Chapon F, Rollet G, Le Corroller T, Gaubert J, Champsaur P, Moulin G, Piquet P, Bartoli JM. [Stent-graft treatment of a ruptured aortic graft: a case report]. J Radiol 2005; 86:76-8. [PMID: 15785420 DOI: 10.1016/s0221-0363(05)81325-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The authors report the clinical and imaging features of a patient with rupture of an aortoiliac graft successfully treated by endovascular approach. The endovascular treatment is easy to perform and effective. The main pitfall of this technique is the limited availability of stent-grafts.
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Affiliation(s)
- V Vidal
- Service de Radiologie Générale, Hôpital Timone, 264 rue Saint Pierre, 13385 Marseille Cedex 05, France
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Abstract
OBJECTIVES To define clinical and radiological characteristics of nasal septal schwannoma, and to propose endoscopic surgery. PATIENT AND METHODS We report a case of an isolated schwannoma of the anterior part of the nasal septum, without involvement of any local structure. The only preoperative symptom was nasal obstruction. Imaging study included a CT scan and an MRI study. RESULTS Schwannoma is a sheath tumor originating from Schwann cells of peripheral nerves. It rarely occurs in nasal and paranasal sinuses and its development on the nasal septum is extremely rare. Complete removal of the tumor was performed by endoscopic sinus surgery technique. Limits of the excision were free of tumor and the histological type was Antoni type A Schwannoma. After a year of follow up, the patient is free of recurrence. CONCLUSION The Schwannoma of the nasal septum is a rare tumour whose clinical and radiological diagnosis by CT scan and IRM is relatively easy. Its treatment is surgical and the endoscopic surgery can be proposed in the forms slightly extensive.
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Affiliation(s)
- F Facon
- Fédération d'Oto-rhino-laryngologie et de chirurgie de la face et du cou.
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Rousseau E, Ruchoux MM, Scaravilli F, Chapon F, Vinchon M, De Smet C, Godfraind C, Vikkula M. CDKN2A
, CDKN2B
and p14 ARF
are frequently and differentially methylated in ependymal tumours. Neuropathol Appl Neurobiol 2003; 29:574-83. [PMID: 14636164 DOI: 10.1046/j.0305-1846.2003.00505.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Ependymal tumours are histologically and clinically varied lesions. Numerical abnormalities of chromosome 9 are frequently associated with these tumours. Nevertheless, the three important tumour suppressor genes located in this chromosome, CDKN2A, CDKN2B and p14 ARF, have not been reported to be commonly altered in them. We studied promoter methylation of these genes, an important mechanism associated with gene silencing in a series of 152 ependymal tumours of WHO grades I to III. Methylation status of the CDKN2A, CDKN2B and p14 ARF promoters was assessed by methylation-specific polymerase chain reaction and the genetic results were correlated to clinicopathological features. We observed promoter methylation for CDKN2A in 21% (26/123) of tumours, for CDKN2B in 32% (23/71) and p14 ARF in 21% (23/108). For all three genes, posterior fossa ependymomas were less frequently methylated in paediatric patients than in adults. For CDKN2B, extracranial tumours were more frequently methylated than intracranial ones. For CDKN2B and p14 ARF, methylation was more frequent in low-grade tumours; the reverse was observed for CDKN2A. CDKN2A, CDKN2B and p14 ARF promoters were methylated in 21-32% of the tumours. Frequencies of methylation varied according to clinicopathological features. This suggests a role for these genes in ependymoma tumorigenesis.
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Affiliation(s)
- E Rousseau
- Laboratory of Neuropathology, Université Catholique de Louvain, Brussels, Belgium
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Jacquier A, Facon F, Vidal V, Pascal T, Chapon F, Dessi P, Bartoli JM, Moulin G. [Sphenoid sinusitis]. J Neuroradiol 2003; 30:211-8. [PMID: 14566188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Sphenoid sinusitis is uncommon, with an incidence of about 2.7%. Failure to diagnose and treat sphenoid sinus disease has been shown to lead to serious neurologic sequellae. Plain radiographs play a limited role in the management of sinusitis. CT scan can provide a positive diagnosis by the visualization of mucosal thickening, air-fluid level and complete opacification of the sinusal cavities. In addition, CT can provide more information about the anatomy and abnormalities of the sphenoid sinus. MRI is used in cases of suspected tumors or neurologic involvement. The most common presenting symptom is headache that arise characteristically, but rarely, from the vertex. Sphenoiditis has a high risk of severe neurologic involvement, cavernous sinus thrombosis being one of the most serious complications.
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Affiliation(s)
- A Jacquier
- Service d'Imagerie Médicale Adultes, Marseille, France
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