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Uchôa LRA, Lucato LT. Newer Updates in Pediatric Intracranial Infection. Semin Roentgenol 2023; 58:88-109. [PMID: 36732014 DOI: 10.1053/j.ro.2022.09.003] [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: 07/25/2022] [Accepted: 09/24/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Luiz Ricardo Araújo Uchôa
- Neuroradiology Section, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil.
| | - Leandro Tavares Lucato
- Neuroradiology Section, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil; Grupo Fleury, São Paulo, Brazil
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Abstract
Neurological manifestations in pandemics frequently cause short and long-term consequences which are frequently overlooked. Despite advances in the treatment of infectious diseases, nervous system involvement remains a challenge, with limited treatments often available. The under-recognition of neurological manifestations may lead to an increase in the burden of acute disease as well as secondary complications with long-term consequences. Nervous system infection or dysfunction during pandemics is common and its enduring consequences, especially among vulnerable populations, are frequently forgotten. An improved understanding the possible mechanisms of neurological damage during epidemics, and increased recognition of the possible manifestations is fundamental to bring insights when dealing with future outbreaks. To reverse this gap in knowledge, we reviewed all the pandemics, large and important epidemics of human history in which neurological manifestations are evident, and described the possible physiological processes that leads to the adverse sequelae caused or triggered by those pathogens.
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Affiliation(s)
- Fernanda Valerio
- University Division of Anaesthesia, Addenbrooke's Hospital, University of Cambridge, Box 93, Hills Road, Cambridge, CB2 0QQ, UK.
| | - Daniel P Whitehouse
- University Division of Anaesthesia, Addenbrooke's Hospital, University of Cambridge, Box 93, Hills Road, Cambridge, CB2 0QQ, UK
| | - David K Menon
- University Division of Anaesthesia, Addenbrooke's Hospital, University of Cambridge, Box 93, Hills Road, Cambridge, CB2 0QQ, UK
- Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, UK
| | - Virginia F J Newcombe
- University Division of Anaesthesia, Addenbrooke's Hospital, University of Cambridge, Box 93, Hills Road, Cambridge, CB2 0QQ, UK
- Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, UK
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Morrison HD, Clarke C, James R, Giffin N. Severe acute disseminated encephalomyelitis complicating measles infection. BMJ Case Rep 2020; 13:13/11/e237346. [PMID: 33229483 DOI: 10.1136/bcr-2020-237346] [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] [Indexed: 11/04/2022] Open
Abstract
A 36-year-old man presented with an acute progressive encephalopathy, followed by tetraparesis and was diagnosed with acute disseminated encephalomyelitis (ADEM) complicating infection with measles virus. Despite demonstrating a typical rash and other early symptoms of measles infection, there was uncertainty around the initial diagnosis. Cerebrospinal fluid analysis and MRI of the brain and spinal cord were consistent with severe ADEM. He required treatment on intensive care but responded favourably to immunosuppressive therapy.This case highlights the importance of recognising acute measles infection, familiarity with the neurological complications and the potential for good outcome. Healthcare professionals must continue to play an active role in educating the public on the importance of maintaining herd immunity through universal immunisation.
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Affiliation(s)
- Hamish Duncan Morrison
- Neurology, Royal United Hospital Bath NHS Trust, Bath, Bath and North East Somer, UK .,Bristol Medical School (PHS), University of Bristol, Bristol, UK
| | - Clemency Clarke
- Medicine, University Hospitals Bristol NHS Foundation Trust, Bristol, Bristol, UK
| | - Richard James
- Radiology, Royal United Hospital Bath NHS Trust, Bath, Bath and North East Somer, UK
| | - Nicola Giffin
- Neurology, Royal United Hospital Bath NHS Trust, Bath, Bath and North East Somer, UK
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Carmo RLD, Alves Simão AK, Amaral LLFD, Inada BSY, Silveira CF, Campos CMDS, Freitas LF, Bonadio V, Marussi VHR. Neuroimaging of Emergent and Reemergent Infections. Radiographics 2020; 39:1649-1671. [PMID: 31589575 DOI: 10.1148/rg.2019190020] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Infectious diseases emerge and reemerge over the years, and many of them can cause neurologic disease. Several factors contribute to the emergence and reemergence of these conditions, including human population growth, an increase in international travel, the geographic expansion of recognized pathogens to areas where they were previously nonendemic, and greater contact with wild animal reservoirs. The antivaccination social movement has played an important role in the reemergence of infectious diseases, especially some viral conditions. The authors review different viral (arboviruses such as dengue, chikungunya, and Zika virus; enterovirus 71; measles; and influenza), bacterial (syphilis, Lyme disease, and listeriosis), and parasitic (Chagas disease) diseases, focusing primarily on their neurologic complications. Although there are several additional infectious diseases with central nervous system manifestations that could be classified as emergent or reemergent, those listed here are the most relevant from an epidemiologic standpoint and are representative of important public health issues on all continents. The infections caused by these pathogens often show a variety of neuroimaging patterns that can be identified at CT and MRI, and radiology is central to the diagnosis and follow-up of such conditions. Given the increasing relevance of emerging and reemerging infections in clinical practice and public health scenarios, radiologists should be familiar with these infections. Online supplemental material is available for this article. ©RSNA, 2019.
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Affiliation(s)
- Rafael Lourenço do Carmo
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
| | - Aylla Keiner Alves Simão
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
| | - Lázaro Luís Faria do Amaral
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
| | - Bruno Shigueo Yonekura Inada
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
| | - Camila Filardi Silveira
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
| | | | - Leonardo Furtado Freitas
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
| | - Victor Bonadio
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
| | - Victor Hugo Rocha Marussi
- From the Department of Neuroradiology, A Beneficência Portuguesa de São Paulo, R. Maestro Cardim 769, São Paulo, SP 01323-001, Brazil
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Koeller KK, Shih RY. Viral and Prion Infections of the Central Nervous System: Radiologic-Pathologic Correlation: From the Radiologic Pathology Archives. Radiographics 2017; 37:199-233. [PMID: 28076019 DOI: 10.1148/rg.2017160149] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Viral infections of the central nervous system (CNS) range in clinical severity, with the most severe proving fatal within a matter of days. Some of the more than 100 different viruses known to affect the brain and spinal cord are neurotropic with a predilection for producing CNS infection. The host response to viral infection of the CNS is responsible for the pathophysiology and imaging findings seen in affected patients. Viral CNS infections can take the form of meningitis, encephalitis, encephalomyelitis, or, when involving the spinal cord and nerve roots, encephalomyeloradiculitis. In 1982, an infectious particle termed a prion that lacked nucleic acid and therefore was not a virus was reported to produce the fatal neurodegenerative disease Creutzfeldt-Jakob disease and related disorders. These prion diseases produce characteristic neuroimaging findings that are distinct from those seen in most viral infections. The clinical and imaging findings associated with viral CNS infection are often nonspecific, with microbiologic analysis of cerebrospinal fluid the most useful single test allowing for diagnosis of a specific viral infection. This review details the spectrum of viral CNS infections and uses case material from the archives of the American Institute for Radiologic Pathology, with a focus on the specific clinical characteristics and magnetic resonance imaging features seen in these infections. Where possible, the imaging features that allow distinction of these infections from other CNS inflammatory conditions are highlighted.
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Affiliation(s)
- Kelly K Koeller
- From the Department of Neuroradiology, American Institute for Radiologic Pathology, Silver Spring, Md (K.K.K., R.Y.S.); Department of Radiology, Mayo Clinic, 200 First St SW, Rochester, MN 55905 (K.K.K.); Uniformed Services University of the Health Sciences, Bethesda, Md (R.Y.S.); and Department of Radiology, Walter Reed National Military Medical Center, Bethesda, Md (R.Y.S.)
| | - Robert Y Shih
- From the Department of Neuroradiology, American Institute for Radiologic Pathology, Silver Spring, Md (K.K.K., R.Y.S.); Department of Radiology, Mayo Clinic, 200 First St SW, Rochester, MN 55905 (K.K.K.); Uniformed Services University of the Health Sciences, Bethesda, Md (R.Y.S.); and Department of Radiology, Walter Reed National Military Medical Center, Bethesda, Md (R.Y.S.)
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Maller VV, Bathla G, Moritani T, Helton KJ. Imaging in viral infections of the central nervous system: can images speak for an acutely ill brain? Emerg Radiol 2016; 24:287-300. [DOI: 10.1007/s10140-016-1463-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 11/02/2016] [Indexed: 12/22/2022]
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Gaeta M, Godani M, Nunziata R, Capellini C, Ciarmiello A. Early detection of encephalitis with 18F-FDG PET/CT. Rev Esp Med Nucl Imagen Mol 2015. [DOI: 10.1016/j.remnie.2015.03.016] [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: 10/23/2022]
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Acosta JH, Rantes CI, Arbelaez A, Restrepo F, Castillo M. Noncongenital central nervous system infections in children: radiology review. Top Magn Reson Imaging 2014; 23:153-64. [PMID: 24887692 DOI: 10.1097/RMR.0000000000000021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Infections of the central nervous system (CNS) are a very common worldwide health problem in childhood with significant morbidity and mortality. In children, viruses are the most common cause of CNS infections, followed by bacterial etiology, and less frequent due to mycosis and other causes. Noncomplicated meningitis is easier to recognize clinically; however, complications of meningitis such as abscesses, infarcts, venous thrombosis, or extra-axial empyemas are difficult to recognize clinically, and imaging plays a very important role on this setting. In addition, it is important to keep in mind that infectious process adjacent to the CNS such as mastoiditis can develop by contiguity in an infectious process within the CNS. We display the most common causes of meningitis and their complications.
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Gaeta MC, Godani M, Nunziata R, Capellini C, Ciarmiello A. Early detection of encephalitis with (18)F-FDG PET/CT. Rev Esp Med Nucl Imagen Mol 2015; 34:188-90. [PMID: 25555323 DOI: 10.1016/j.remn.2014.11.002] [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: 10/03/2014] [Revised: 11/05/2014] [Accepted: 11/07/2014] [Indexed: 10/24/2022]
Abstract
Encephalitis is a relatively rare condition for which making an accurate diagnosis can be challenging. In fact, clinical features are not specific and structural imaging can be normal in a considerable number of cases. However, an early diagnosis is important as many forms of treatment are effective if started promptly. Even though recent guidelines do not recommend (18)F-FDG PET/CT for patients with suspected encephalitis, the case presented suggests that (18)F-FDG PET/CT may play a relevant role for the early diagnosis of this clinical condition.
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Affiliation(s)
- M C Gaeta
- Nuclear Medicine Department, S. Andrea Hospital, La Spezia, Italy.
| | - M Godani
- Neurology Department, S. Andrea Hospital, La Spezia, Italy
| | - R Nunziata
- Neuropathology and Neurology 5, IRCCS Foundation "Carlo Besta" Neurological Institute, Milano, Italy
| | - C Capellini
- Neuroradiology Unit, S. Andrea Hospital, La Spezia, Italy
| | - A Ciarmiello
- Nuclear Medicine Department, S. Andrea Hospital, La Spezia, Italy
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Qi S, Jia C, Yin Y. Measles. Radiology of Infectious Diseases: Volume 1 2015. [DOI: 10.1007/978-94-017-9882-2_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Measles is an acute respiratory infectious disease caused by measles virus. Clinically, it is characterized by fever, rhinorrhea, conjunctival congestion, respiratory catarrh symptoms, oral mucosa spots, and red skin maculopapules. The patients with acute measles are the only source of its infection, who are infectious from the final 1–2 days of the incubation period to the day 5 after skin rash. Measles is commonly transmitted via respiratory droplets, with occurrence all year round but more commonly in winters and springs. Measles is the most common infectious disease in children, with strong infectivity. In recent years, the cases of measles in adults are increasing. Elimination of measles has been listed as the next objective of WHO after elimination of poliomyelitis.
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Affiliation(s)
- Mathur Mahan
- Department of Radiology, Yale University School of Medicine, New Haven, CT, USA
| | - Muchantef Karl
- Department of Radiology, Yale University School of Medicine, New Haven, CT, USA
| | - Sze Gordon
- Department of Radiology, Yale University School of Medicine, New Haven, CT, USA.
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Abstract
Viral infections of the central nervous system (CNS) are commonly encountered and there has been continued emergence of new neurotropic viruses which are being frequently recognized. These may present clinically as encephalitis, meningitis, encephalomyelitis, and encephalomyeloradiculitis. The clinical manifestations are usually nonspecific and diagnosis is usually based on the laboratory investigations. Imaging plays a role in its early detection and at times suggests the specific diagnosis that may help in early institution of appropriate therapy. In this review, we summarize the pathology, clinical, and imaging features of the common viral infections that affect the CNS.
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Affiliation(s)
- Rakesh Kumar Gupta
- Department of Radiodiagnosis, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
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Ferraro A, Milhaud D. [Acute post infectious myelitis associated with measles: a case report]. Rev Neurol (Paris) 2012; 169:88-90. [PMID: 22695272 DOI: 10.1016/j.neurol.2012.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 02/26/2012] [Accepted: 03/25/2012] [Indexed: 11/30/2022]
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Husain N, Kumar P. Pathology of tropical diseases. Neuroimaging Clin N Am 2011; 21:757-75, vii. [PMID: 22032498 DOI: 10.1016/j.nic.2011.07.003] [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] [Indexed: 10/17/2022]
Abstract
Tropical diseases affecting the central nervous system include infections, infestations, and nutritional deficiency disorders. This article discusses the commonly encountered diseases. The infections include bacterial, mycobacterial, fungal, parasitic, and viral infections with varied clinical manifestations. Imaging sensitivity and specificity for the prediction of the cause of infections has improved with application of advanced techniques. Microbial demonstration and histology remain the gold standard for diagnosis. Understanding the basis of imaging changes is mandatory for better evaluation of images. Nutritional disorders present with generalized and nonspecific imaging manifestations. The pathology of commonly encountered vitamin deficiencies is also discussed.
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Affiliation(s)
- Nuzhat Husain
- Department of Pathology, Dr Ram Manohar Lohia Institute of Medical Sciences, Gomti Nagar, Lucknow, Uttar Pradesh, India.
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Messina M, Meli G, Viglianesi A, Scavone G, Belfiore G, Di Bella D. Transient Bilateral Basal Ganglia Lesions in Rotavirus Encephalopathy. Neuroradiol J 2010; 23:42-7. [DOI: 10.1177/197140091002300107] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 10/20/2009] [Indexed: 11/17/2022] Open
Abstract
Rotavirus gastroenteritis may be associated with the onset of an acute reversible encephalitis. We describe a case of transient bilateral basal ganglia lesions after a prodromal gastroenteritis which completely resolved four months later. Diffusion weighted images were determinant to depict the basal ganglia abnormalities and were helpful to evaluate the prognosis. A review of the literature indicates that many diseases may be accompanied by signal abnormalities within the basal ganglia and that differential diagnosis is possible only through the simultaneous evaluation of imaging, clinical and laboratory findings.
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Affiliation(s)
- M. Messina
- Department of Radiology, Catania University Hospital; Catania, Italy
| | - G.A. Meli
- Department of Radiology, “San Giovanni di Dio e Sant' Isidoro” Hospital of Giarre; Catania, Italy
| | - A. Viglianesi
- Department of Radiology, Catania University Hospital; Catania, Italy
| | - G. Scavone
- Department of Radiology, Catania University Hospital; Catania, Italy
| | - G. Belfiore
- Department of Paediatric Radiology, Catania University Hospital; Catania, Italy
| | - D. Di Bella
- Department of Paediatric Radiology, Catania University Hospital; Catania, Italy
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Abstract
Many viral infections can involve the central nervous systems (CNS) of fetuses, neonates, infants, and children. The pathogenesis, patterns of CNS involvement, and species of viral infection may differ in the developing fetus, infant and neonate, and early childhood. Familiarity with the clinical course and imaging appearances of the variable CNS diseases is helpful in making correct differential diagnoses and in prompting timely treatment. This article reviews the clinical courses, pathologic findings, and imaging features of the most common viral infections that may involve the CNS of neonates and infants, including congenital and neonatal CNS viral infections, common CNS viral infections, and parainfectious encephalomyelitis.
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Affiliation(s)
- Chung-Ping Lo
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center, 325, Section 2, Cheng-Kung Road, Neihu 114, Taipei, Taiwan, ROC
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Oguz KK, Celebi A, Anlar B. MR imaging, diffusion-weighted imaging and MR spectroscopy findings in acute rapidly progressive subacute sclerosing panencephalitis. Brain Dev 2007; 29:306-11. [PMID: 17098390 DOI: 10.1016/j.braindev.2006.09.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2006] [Revised: 06/05/2006] [Accepted: 09/22/2006] [Indexed: 10/23/2022]
Abstract
We are presenting two cases with subacute sclerosing panencephalitis of acute and rapid form, which were initially diagnosed as acute viral encephalitis. We obtained both diffusion-weighted imaging and magnetic resonance spectroscopy, whose findings suggested the presence of acute inflammatory and metabolic changes with peculiar distribution, which were not observed on conventional MR imaging. These techniques might help to demonstrate the extent and progression of the panencephalitis.
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Affiliation(s)
- Kader Karli Oguz
- Hacettepe University, Faculty of Medicine, Department of Radiology, Ankara, Turkey
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Alkan A, Korkmaz L, Sigirci A, Kutlu R, Yakinci C, Erdem G, Yologlu S. Subacute sclerosing panencephalitis: Relationship between clinical stage and diffusion-weighted imaging findings. J Magn Reson Imaging 2006; 23:267-72. [PMID: 16456844 DOI: 10.1002/jmri.20518] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 11/08/2022] Open
Abstract
PURPOSE To investigate the relationship between clinical stages and apparent diffusion coefficient (ADC) changes in the brain of patients with subacute sclerosing panencephalitis (SSPE). MATERIALS AND METHODS A total of 18 patients with stage II (N = 11) and III (N = 7) SSPE and 11 age-matched controls underwent routine MRI and diffusion-weighted imaging (DWI). The ADC values were automatically calculated. Seven distinct neuroanatomic structures (frontal, parieto-occipital, and cerebellar white matter; deep white matter; thalamus; basal ganglia; and brainstem) were selected for analysis in the patient and control groups. RESULTS Hyperintensities in the periventricular and subcortical white matters on T2-weighted images and ADC maps were detected in 63.6% of patients with stage II and in all patients with stage III. There were significant differences between stage II and III patients and also between patients and control group in ADC values that obtained from all locations. The highest mean ADC values were calculated in stage III patients. Although MRI and DWI findings were normal in four patients with stage II disease, ADC values were significantly increased when compared with controls. CONCLUSION The stage of disorder may be independent of DWI appearance during the early stage (stages I and II), even though the brain is affected. Therefore, DWI and ADC values supplemental to routine MRI should also be utilized for lesion detection and definition to enhance diagnostic accuracy in patients with SSPE.
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Affiliation(s)
- Alpay Alkan
- Department of Radiology, Inonu University School of Medicine, 44069 Malatya, Turkey.
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Abstract
Neuroimaging plays a crucial role in the diagnosis and therapeutic decision making in infectious diseases of the nervous system. The review summarizes imaging findings and recent advances in the diagnosis of pyogenic brain abscess, ventriculitis, viral disease including exotic and emergent viruses, and opportunistic disease. For each condition, the ensuing therapeutic steps are presented. In cases of uncomplicated meningitis, cranial computed tomography (CT) appears to be sufficient for clinical management to exclude acute brain edema, hydrocephalus, and pathology of the base of skull. Magnetic resonance imaging (MRI) is superior in depicting complications like sub-/epidural empyema and vasculitic complications notably on FLAIR (fluid-attenuated inversion recovery)-weighted images. The newer technique of diffusion-weighted imaging (DWI) shows early parenchymal complications of meningitis earlier and with more clarity and is of help in differentiation of pyogenic abscess (PA) from ring enhancing lesions of other etiology. Proton magnetic resonance spectroscopy (PMRS) seems to produce specific peak patterns in cases of abscess. The presence of lactate cytosolic amino acids and absence of choline seems to indicate PA. Also in cases of suspected opportunistic infection due to toxoplasma DWI may be of help in the differentiation from lymphoma, showing no restriction of water diffusion. In patients with herpes simplex and more exotic viruses like West Nile and Murray Valley virus DWI allows earlier lesion detection and therapeutic intervention with virustatic drugs.
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Affiliation(s)
- Oliver Kastrup
- Department of Neurology, University Duisburg-Essen, 45122 Essen, Germany.
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Abstract
High vaccination coverage rates and the administration of a second dose of measles vaccine have resulted in a significant decline in the incidence of measles and neurologic diseases due to measles in many countries. However, intermittent outbreaks of measles still occur even in countries with excellent vaccination coverage, suggesting the existence of high rates of measles virus introduction from endemic regions and/or waning of vaccine-induced immunity. Strategies to sustain high levels of global immunity to measles virus by increasing vaccine coverage with routine and supplementary vaccination campaigns must be supported.
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Affiliation(s)
- Martin O Ota
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA.
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Abstract
PURPOSE OF REVIEW Neuroimaging constitutes an important component in the diagnosis of the underlying infectious agents in central nervous system infection. This review summarizes progress in the neuroimaging of infectious central nervous system disease since January 2003. It focuses on imaging of viral encephalitis, including that caused by exotic and emerging viruses, and on imaging in immunodeficient patients. RECENT FINDINGS Diffusion-weighted imaging has been shown to be superior to conventional magnetic resonance imaging for the detection of early signal abnormalities in herpes simplex virus encephalitis but also in enterovirus 71 encephalitis and in West Nile encephalitis. Several studies defined the pattern of magnetic resonance imaging signal changes in endemic diseases such as West Nile encephalitis, Murray Valley encephalitis, enterovirus 71 encephalitis and Japanese encephalitis, but also in encephalitides due to ubiquitous viruses such as measles virus and Lyssavirus (rabies). In patients with HIV infection, apparent diffusion coefficient ratios obtained by diffusion-weighted imaging were significantly greater in lesions due to Toxoplasma encephalitis than in primary central nervous system lymphomas. SUMMARY The diagnosis of unclear infectious central nervous system diseases remains a challenge. More recent magnetic resonance imaging techniques, such as diffusion-weighted imaging and magnetic resonance spectroscopy, provide additional helpful information. However, the mainstay of diagnosis remains the detection of viral DNA or serological markers of specific infectious agents within the cerebrospinal fluid.
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Affiliation(s)
- Matthias Maschke
- Department of Neurology and Department of Radiology, University of Duisburg-Essen, Essen, Germany.
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Abstract
Although rare, encephalitis and hepatitis are major complications of measles that are more common in adults than in infants. On the other hand, although several other complications of measles, such as pneumonia and myocarditis, are found in all ages, acute pancreatitis in measles is very rare in both children and adults. We describe a 16-year-old female patient with measles encephalitis who developed acute pancreatitis. The response to steroid therapy was favorable.
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Affiliation(s)
- Kohzo Takebayashi
- Department of Medicine, Koshigaya Hospital, Dokkyo University School of Medicine, Koshigaya, Japan.
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