1
|
Meyer HJ, Schneider I, Emmer A, Kornhuber M, Surov A. Associations between magnetic resonance imaging and EMG findings in myopathies. Acta Neurol Scand 2020; 142:428-433. [PMID: 32436228 DOI: 10.1111/ane.13284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/03/2020] [Accepted: 05/14/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Magnetic resonance imaging (MRI) is a cornerstone in diagnosis of myopathies. The present study sought to elucidate possible associations between electromyography (EMG) findings and histogram parameters derived from clinical MRI in myositis and other myopathies. MATERIALS AND METHODS Twenty six patients with myopathies were included in this retrospective study. Clinical MRI was performed with a 1.5T MRI scanner including T2- and T1-weighted images. EMG analysis was performed during clinical diagnostic workup. The histogram parameters of the MRI sequences were obtained of the same muscle, which was investigated with EMG. RESULTS Several correlations were identified between mean duration of the motor unit potentials (MUP) and histogram parameters derived from T1- and T2-weighted images. The highest for T1-weighted images was mode (r = -.73, P < .0001) and for T2-weighted images was p25 (r = -.57, P = .022). There were significant differences for several histogram parameters between muscles with pathological spontaneous activity and without. So, for T1-weighted images, the best discrimination was achieved with mean (P = .096), and for T2-weighted images for p10 (P = .05). Mean SI values derived from T1-weighted images achieved an AUC of 0.84 with a sensitivity of 0.81 and a specificity of 0.86 to discriminate patients with and without pathological spontaneous activity (PSA). CONCLUSIONS The present study identified strong associations between histogram analysis derived from morphological MRI sequences and the duration of the MUP derived from EMG in myopathies strengthening the fact that both diagnostic modalities can reflect disease state in a similar fashion. Histogram parameters can predict muscles with PSA.
Collapse
Affiliation(s)
- Hans-Jonas Meyer
- Department of Diagnostic and Interventional Radiology, University of Leipzig, Leipzig, Germany
| | - Ilka Schneider
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Alexander Emmer
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Malte Kornhuber
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Alexey Surov
- Department of Diagnostic and Interventional Radiology, University of Magdeburg, Magdeburg, Germany
| |
Collapse
|
2
|
Meyer HJ, Emmer A, Kornhuber M, Surov A. Associations between apparent diffusion coefficient and electromyography parameters in myositis-A preliminary study. Brain Behav 2018; 8:e00958. [PMID: 29761011 PMCID: PMC5943752 DOI: 10.1002/brb3.958] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 02/05/2018] [Accepted: 02/21/2018] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE MRI is widely used in several muscle disorders. Diffusion-weighted imaging (DWI) is an emergent imaging modality sensitive to microstructural alterations in tissue. The apparent diffusion coefficient (ADC) is used to quantify the random motion of water molecules. Electromyography (EMG) is a clinically used diagnostic tool in myositis. The aim of this study was to elucidate possible associations between ADC values and EMG findings in myositis patients. METHOD Seven patients (eight investigated muscles) with myositis (mean age 51.43 ± 19 years) were included in this study. The diagnosis was confirmed by histopathology in every case. DWI was obtained with a 1.5-T scanner using two b-values 0 and 1000 s/mm². In all patients, a needle electromyography (EMG) was performed within 3 days to the MRI. The following EMG parameters were studied: motor unit action potential (MUAP) amplitudes and durations, as well as pathological spontaneous activity. Spearman's correlation coefficient was used to analyze associations between investigated parameters. RESULTS The estimated mean ADC mean value was 1.51 ± 0.29 × 10-3 mm²/s, mean ADC min was 1.28 ± 0.27 × 10-3 mm²/s, and mean ADC max was 1.73 ± 0.28 × 10-3 mm²/s. Correlation analysis identified significant associations between ADC mean and duration of the MUAP (p = .78 P = .0279) and between ADC min and duration of the MUAP (p = .85, P = .01). There were no significant differences according to pathological spontaneous activity. CONCLUSION ADC mean and ADC min showed strong positive correlations with the duration of the MUAP in myositis patients. Both modalities might similarly reflect muscle fiber loss in myositis patients.
Collapse
Affiliation(s)
- Hans-Jonas Meyer
- Department of Diagnostic and Interventional Radiology University of Leipzig Leipzig Germany
| | - Alexander Emmer
- Department of Neurology Martin-Luther University Halle-Wittenberg Halle Germany
| | - Malte Kornhuber
- Department of Neurology Martin-Luther University Halle-Wittenberg Halle Germany
| | - Alexey Surov
- Department of Diagnostic and Interventional Radiology University of Leipzig Leipzig Germany
| |
Collapse
|
3
|
Malik A, Hayat G, Kalia JS, Guzman MA. Idiopathic Inflammatory Myopathies: Clinical Approach and Management. Front Neurol 2016; 7:64. [PMID: 27242652 PMCID: PMC4873503 DOI: 10.3389/fneur.2016.00064] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 04/12/2016] [Indexed: 01/30/2023] Open
Abstract
Idiopathic inflammatory myopathies (IIM) are a group of chronic, autoimmune conditions affecting primarily the proximal muscles. The most common types are dermatomyositis (DM), polymyositis (PM), necrotizing autoimmune myopathy (NAM), and sporadic inclusion body myositis (sIBM). Patients typically present with sub-acute to chronic onset of proximal weakness manifested by difficulty with rising from a chair, climbing stairs, lifting objects, and combing hair. They are uniquely identified by their clinical presentation consisting of muscular and extramuscular manifestations. Laboratory investigations, including increased serum creatine kinase (CK) and myositis specific antibodies (MSA) may help in differentiating clinical phenotype and to confirm the diagnosis. However, muscle biopsy remains the gold standard for diagnosis. These disorders are potentially treatable with proper diagnosis and initiation of therapy. Goals of treatment are to eliminate inflammation, restore muscle performance, reduce morbidity, and improve quality of life. This review aims to provide a basic diagnostic approach to patients with suspected IIM, summarize current therapeutic strategies, and provide an insight into future prospective therapies.
Collapse
Affiliation(s)
- Asma Malik
- Neurology, Saint Louis University, Saint Louis, MO, USA
| | - Ghazala Hayat
- Neurology, Saint Louis University, Saint Louis, MO, USA
| | - Junaid S. Kalia
- Department of Neurology and Neurotherapeutics, The University of Texas Southwestern, Dallas, TX, USA
| | - Miguel A. Guzman
- Department of Pathology, Saint Louis University, Saint Louis, MO, USA
| |
Collapse
|
4
|
Alshekhlee A, Katirji B. Clinical perspectives of statin-induced rhabdomyolysis. Am J Med 2007; 120:e29; author reply e33. [PMID: 18060911 DOI: 10.1016/j.amjmed.2006.08.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2006] [Revised: 07/28/2006] [Accepted: 08/05/2006] [Indexed: 11/30/2022]
|
5
|
LIMAYE V, BLUMBERGS P, SCOTT G, ROBERTS-THOMSON P. The clinical features of dermatomyositis in a South Australian population. ACTA ACUST UNITED AC 2007. [DOI: 10.1111/j.1479-8077.2007.00266.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
6
|
Al-Shekhlee A, Hachwi R, Katirji B. Subtle needle electromyography changes may be seen in patients with inflammatory myositis also. J Clin Neuromuscul Dis 2005; 7:95-96. [PMID: 19078791 DOI: 10.1097/01.cnd.0000185649.26496.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
|
7
|
Gilchrist JM, Sachs GM. Electrodiagnostic studies in the management and prognosis of neuromuscular disorders. Muscle Nerve 2003; 29:165-90. [PMID: 14755481 DOI: 10.1002/mus.10489] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Prognosis remains a neglected aspect of modern medical care and research, behind diagnosis and treatment. The very term "electrodiagnosis" implies as much. Despite this, much has been published regarding the use and benefit of electrodiagnostic techniques in assessing prognosis and assisting in management of patients after the diagnosis has been established. This information is often hidden or otherwise not emphasized. This review summarizes the literature regarding the use of such techniques for prognosis and management of disorders of lower motor neurons, peripheral nerves, neuromuscular transmission, and muscle.
Collapse
Affiliation(s)
- James M Gilchrist
- Department of Neurology, Rhode Island Hospital, Brown Medical School, 593 Eddy Street, APC 689, Providence, Rhode Island 02903, USA.
| | | |
Collapse
|
8
|
Abstract
Through the recent efforts of multi-center collaborative study groups, a number of measures have been developed and partially validated to assess disease activity, disease damage, and health-related quality of life in adult and juvenile patients with IIM. Preliminary core set domains and core set measures of activity and damage have also been developed for adult and juvenile patients with myositis. Validated definitions of improvement and disability should be forthcoming in the next few years. These extraordinary developments will enable much-needed standardization in the assessment of the IIM, particularly in therapeutic and other clinical research studies. Despite this substantial progress, there is a need to develop more sensitive measures to assess IIM disease activity and damage, to further validate the existing tools, to define their performance characteristics in various IIM subgroups, to develop improved imaging techniques that are also quantitative, and to validate activation markers as surrogate measures. The ongoing cooperation of multiple specialists with expertise in these disorders, combined with emerging novel technologies, should continue to enhance the assessment of myositis. Improved clinical care and more rapid development of new therapies for patients with myositis will be the ultimate gains realized from these efforts.
Collapse
Affiliation(s)
- Lisa G Rider
- National Institute of Environmental Health Sciences, NIH 9 Memorial Drive, Room 1W107, MSC 0958 Bethesda, MD 20892, USA.
| |
Collapse
|
9
|
Abstract
A child with Wilm's tumor and a child with immune thrombocytopenic purpura (ITP) were each noted to have persistent elevations of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH). Both children underwent thorough evaluation for liver disease and, as a result, experienced delays in treatment of the Wilm's tumor and ITP. Eventually both children were found to have extremely elevated serum creatine kinase (CK). Muscle biopsy confirmed diagnoses of Duchenne's muscular dystrophy in one child, and Becker's muscular dystrophy in the second. Hematologists/oncologists should consider obtaining a serum CK to rule out muscle disease in patients with unexplained elevations of AST, ALT, and LDH.
Collapse
Affiliation(s)
- D N Korones
- Department of Pediatrics, University of Rochester, School of Medicine and Dentistry, Children's Hospital at Strong, New York 14642, USA.
| | | | | |
Collapse
|
10
|
Abstract
New information regarding myositis specific autoantibodies, histopathologic analysis of muscle biopsy specimens, and immunogenetic features of the different serologic subsets of disease has greatly increased our understanding of the pathogenesis of the inflammatory myopathies. The clinical descriptions of inclusion body myositis and 'amyopathic dermatomyositis' (Euwer and Sontheimer, 1993) are examples of our expanded descriptive capabilities in the evaluation of patients with myopathy. Finally, newer techniques such as cytokine analysis and magnetic resonance imaging may help in the ongoing assessment of disease activity in patients with myositis. The combination of these recently described clinical and laboratory parameters are enough to force a reconsideration of the previously described classification and diagnostic criteria in the inflammatory myopathies.
Collapse
Affiliation(s)
- C V Oddis
- Department of Medicine, University of Pittsburgh School of Medicine, PA 15261, USA
| | | |
Collapse
|
11
|
Rider LG, Miller FW. Laboratory evaluation of the inflammatory myopathies. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 1995; 2:1-9. [PMID: 7719899 PMCID: PMC170091 DOI: 10.1128/cdli.2.1.1-9.1995] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The laboratory plays an important role in the diagnosis, evaluation, and classification of the heterogeneous group of diseases known as the IIM, which are characterized by chronic muscle inflammation. Serial measurements of the levels of muscle-derived enzymes in serum are the traditional laboratory studies used to follow the clinical course of patients with IIM, although other laboratory tests can also be useful in assessing myositis disease activity. Several markers of immune system activation, including cytokines and lymphocyte markers, show promise as possibly more sensitive measures of myositis disease activity. Discovery of a unique group of MSAs over the past decade has provided an immunologic basis for defining relatively homogeneous subsets of patients who share similar clinical features, disease courses, and responses to therapy. Future investigations of novel immunologic activation markers, as well as the cloning and expression of target autoantigens of the MSAs, should allow better diagnostic assays, enhanced prognosis, and a better understanding of the pathogenesis of these disorders.
Collapse
Affiliation(s)
- L G Rider
- Molecular Immunology Laboratory, U.S. Food and Drug Administration, Bethesda, Maryland 20892
| | | |
Collapse
|
12
|
Kundrotas LW, Clement DJ. Serum alanine aminotransferase (ALT) elevation in asymptomatic US Air Force basic trainee blood donors. Dig Dis Sci 1993; 38:2145-50. [PMID: 8261813 DOI: 10.1007/bf01299887] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The purpose of this study was to determine the etiology of elevated alanine aminotransferase (ALT) in a population of asymptomatic volunteer blood donors. Subjects with an ALT value > 2.25 sd above norm (> 55 IU/liter) from the donated unit, were prospectively evaluated over a six-week interval. The subjects consisted of blood donors (78% male, 22% female) beginning basic military training at Lackland Air Force Base. Of 44,160 individuals screened, 19,877 (45%) voluntarily donated blood, 99 (0.5%) of which had confirmed ALT elevation. Of these (90 male/9 female), an associated condition or explanation was made in 12%: four with acute hepatitis B, four positive for anti-HCV, two with autoimmune disease, one with cholelithiasis and one associated with acute appendicitis. In 87 the ALT elevation could not be explained using available testing methods but may represent individual variation from a non-Gaussian distribution, be of nonhepatic origin (muscle), or of hepatic disease not detected by the diagnostic algorithm used. To increase the diagnostic yield, it is suggested that at least two elevated ALT values be established in this population over a period of time (yet undefined), before an extensive hepatic investigation is pursued.
Collapse
Affiliation(s)
- L W Kundrotas
- Department of Gastroenterology, Wilford Hall USAF Medical Center, Lackland Air Force Base, Texas 78236-5300
| | | |
Collapse
|