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A meta-analysis on the prevalence of Charcot-Marie-Tooth disease and related inherited peripheral neuropathies. J Neurol 2023; 270:2468-2482. [PMID: 36631678 DOI: 10.1007/s00415-023-11559-8] [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: 12/05/2022] [Revised: 01/01/2023] [Accepted: 01/02/2023] [Indexed: 01/13/2023]
Abstract
BACKGROUND Charcot-Marie-Tooth disease and related inherited peripheral neuropathies (CMT&RIPNs) brings great suffering and heavy burden to patients, but its global prevalence rates have not been well described. METHODS We searched major English and Chinese databases for studies reporting the prevalence of CMT&RIPNs from the establishment of the databases to September 26, 2022. Based on the age, gender, study design, study region, and disease subtype, the included studies were correspondingly synthesized for meta-analyses on the overall prevalence and/or the subgroup analyses by using pool arcsine transformed proportions in the random-effects model. RESULTS Of the finally included 31 studies, 21 studied the whole age population and various types of CMT&RIPNs, and the others reported specific disease subtype(s) or adult or non-adult populations. The pooled prevalence was 17.69/100,000 (95% CI 12.32-24.33) for the whole age population and significantly higher for CMT1 [10.61/100,000 (95% CI 7.06-14.64)] than for other subtypes (P' < 0.001). Without statistical significance, the prevalence seemed higher in those aged ≥ 16 or 18 years (21.02/100,000) than in those aged < 16 years (16.13/100,000), in males (22.50/100,000) than in females (17.95/100,000), and in Northern Europe (30.97/100,000) than in other regions. CONCLUSION CMT&RIPNs are relatively more prevalent as CMT1 in the disease subtypes, and probably prevalent in older ages, males, and Northern Europe. More studies on the epidemiological characteristics of CMT&RIPNs with well-defined diagnosis criteria are needed to improve the prevalence evaluation and to arouse more attention to health care support.
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Warner WC. Orthopedic Surgery in Neuromuscular Disorders. Neuromuscul Disord 2022. [DOI: 10.1016/b978-0-323-71317-7.00009-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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3
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Lin T, Gibbons P, Mudge AJ, Cornett KM, Menezes MP, Burns J. Surgical outcomes of cavovarus foot deformity in children with Charcot-Marie-Tooth disease. Neuromuscul Disord 2019; 29:427-436. [DOI: 10.1016/j.nmd.2019.04.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 04/07/2019] [Accepted: 04/24/2019] [Indexed: 11/27/2022]
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Lousa M, Vázquez-Huarte-Mendicoa C, Gutiérrez AJ, Saavedra P, Navarro B, Tugores A. Genetic epidemiology, demographic, and clinical characteristics of Charcot-Marie-tooth disease in the island of Gran Canaria (Spain). J Peripher Nerv Syst 2019; 24:131-138. [PMID: 30569560 DOI: 10.1111/jns.12299] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/07/2018] [Accepted: 12/16/2018] [Indexed: 02/01/2023]
Abstract
Charcot-Marie-Tooth (CMT) disease is the most common hereditary neuromuscular disorder. This study involves the entire known CMT patient registry in Gran Canaria, represented by 256 patients belonging to 79 unrelated families, who were clinically and genetically characterized, along with physical and neurophysiological evaluation on 181 and 165 patients, respectively. Complete genotyping showed an estimated prevalence of CMT disease of 30.08/100 000 (95% confidence interval [CI] = 26.5;33.9), corresponding mainly (78.5%) to CMT1A (23.6/100 000) and hereditary neuropathy with liability to pressure palsies [HNPP] 17.5%; 5.29/100 000). Most patients (198) with CMT1A carried the 17p11.2 duplication including the PMP22 gene, 45 patients with HNPP were all affected by deletion of the 17p11.2 locus, and 10 patients presented with axonal phenotypes: CMT2A (MFN2), CMT2N (AARS), and CMT1X (GJB1). Despite showing a classical CMT1A phenotype, we found a much earlier age of onset in our CMT1A patients, along with increased frequency of appearance of postural hand tremor. Bilateral tongue atrophy was an additional phenotype observed. Being this CMT1A group, one of the largest cohorts known to date, this study provided a unique opportunity to further define the clinical phenotype of CMT1A patients carrying the 17p11.2 duplication in a homogeneous ethnic group.
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Affiliation(s)
- Manuel Lousa
- Department of Neurology, Complejo Hospitalario Universitario Insular-Materno Infantil, Las Palmas de Gran Canaria
| | | | - Antonio J Gutiérrez
- Department of Neurology, Complejo Hospitalario Universitario Insular-Materno Infantil, Las Palmas de Gran Canaria
| | - Pedro Saavedra
- Department of Mathematics, University of Las Palmas de Gran Canaria
| | - Beatriz Navarro
- Department of Neurophysiology, Complejo Hospitalario Universitario Insular-Materno Infantil, Las Palmas de Gran Canaria
| | - Antonio Tugores
- Research Unit, Complejo Hospitalario Universitario Insular-Materno Infantil, Las Palmas de Gran Canaria
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Reilly MM, Pareyson D, Burns J, Laurá M, Shy ME, Singh D. 221st ENMC International Workshop:: Foot Surgery in Charcot-Marie-Tooth disease. 10-12 June 2016, Naarden, The Netherlands. Neuromuscul Disord 2017; 27:1138-1142. [PMID: 29074294 DOI: 10.1016/j.nmd.2017.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 09/13/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Mary M Reilly
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, London, UK
| | - Davide Pareyson
- Department of Clinical Neurosciences, IRCCS Foundation, Carlo Besta Neurological Institute, Milan, Italy
| | - Joshua Burns
- The University of Sydney, Sydney Children's Hospitals Network (Randwick and Westmead), Sydney, New South Wales, Australia
| | - Matilde Laurá
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, London, UK.
| | | | - Dishan Singh
- Royal National Orthopaedic Hospital, Stanmore, UK
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Vaeth S, Vaeth M, Andersen H, Christensen R, Jensen UB. Charcot-Marie-Tooth disease in Denmark: a nationwide register-based study of mortality, prevalence and incidence. BMJ Open 2017; 7:e018048. [PMID: 29101144 PMCID: PMC5695502 DOI: 10.1136/bmjopen-2017-018048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVES Charcot-Marie-Tooth disease (CMT) is the most common inherited disorder of the peripheral nervous system, yet no studies have compared the mortality in patients with CMT with that of the general population, and prevalence estimates vary considerably. We performed a nationwide register-based study to investigate the prevalence, incidence and mortality of CMT in Denmark. DESIGN We used the Danish National Patient Registry to select all records with primary diagnostic codes for CMT between 1977 and 2012 given at a neurological, neurophysiological, paediatric or clinical genetic clinic. The prevalence was estimated by 31 December 2012, and the incidence rate was calculated based on data from 1988 to 2012. We calculated a standardised mortality ratio (SMR) and an absolute excess mortality rate (AER) stratified according to age categories and disease duration. RESULTS A total of 1534 patients (652 women) were identified. The prevalence proportion was 22.5 per 100 000 (95% CI 21.2 to 23.7) and the incidence rate was 0.98 (95% CI 0.93 to 1.04) per 100 000 person-years. The SMR was 1.36 (95% CI 1.21 to 1.53), and the AER was 4.87 per 1000 person-years (95% CI 2.77 to 6.96). We found a significantly higher SMR in cases below 50 years of age, and in cases with disease duration of more than 10 years. CONCLUSIONS We found a reduced life expectancy among patients diagnosed with CMT. To our knowledge, this is the first study of CMT to use nationwide register-based data, and the first to report an SMR and an AER.
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Affiliation(s)
- Signe Vaeth
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Michael Vaeth
- Department of Public Health, Section for Biostatistics, Aarhus University, Aarhus, Denmark
| | - Henning Andersen
- Department of Neurology, Aarhus University Hospital, Aarhus, Denmark
| | - Rikke Christensen
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Uffe Birk Jensen
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
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Marttila M, Kytövuori L, Helisalmi S, Kallio M, Laitinen M, Hiltunen M, Kärppä M, Majamaa K. Molecular Epidemiology of Charcot-Marie-Tooth Disease in Northern Ostrobothnia, Finland: A Population-Based Study. Neuroepidemiology 2017; 49:34-39. [PMID: 28810241 DOI: 10.1159/000478860] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 06/14/2017] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Charcot-Marie-Tooth (CMT) disease is the most common hereditary neuromuscular disorder with a population prevalence of 9.7-82.3/100,000. In this study, we have estimated the prevalence of CMT and its subtypes in Finland and examined the frequency of molecular etiologies. METHODS A population-based survey included adult patients with peripheral neuropathy from the province of Northern Ostrobothnia, Finland. Secondary causes of peripheral polyneuropathy were excluded and patients with clinical and neurophysiological features pertinent with CMT were included. Molecular diagnostics was carried out when DNA was available. RESULTS We found 107 subjects with CMT yielding a prevalence 34.6/100,000 in Northern Ostrobothnia. The heterozygous point mutation p.His123Arg in ganglioside induced differentiation associated protein 1 (GDAP1) was found in 31.5% and peripheral myelin protein 22 (PMP22) duplication in 16.9% of the affected. Point mutations in myelin protein zero, mitofusin 2, and gap junction protein beta 1 accounted for 6.7% of the cases. In addition, 18 persons had hereditary neuropathy with liability to pressure palsies and 15 of them carried the PMP22 deletion. CONCLUSIONS The prevalence of CMT in Northern Ostrobothnia, Finland, seems to be slightly higher than those in previous studies in European populations. Founder mutation in the GDAP1 gene accounts for a large part of the genetically defined CMT2 in Finland.
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Affiliation(s)
- Maria Marttila
- Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
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8
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Charcot-Marie-Tooth disease variants-classification, clinical, and genetic features and rational diagnostic evaluation. J Clin Neuromuscul Dis 2014; 15:117-28. [PMID: 24534835 DOI: 10.1097/cnd.0000000000000020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Inherited neuropathies are among the most prevalent inherited neurologic disorders, and with current advances in molecular biology and genetic testing, the clinical spectrum of phenotype/genotype has been expanding enormously. Genetic testing is nowadays commercially available to several subtypes although many remain because of unknown genetic defect. A stepwise rational approach, which is shown in , facilitates reaching a specific diagnosis and reduces the cost.
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Gess B, Röhr D, Young P. Ascorbic acid and sodium-dependent vitamin C transporters in the peripheral nervous system: from basic science to clinical trials. Antioxid Redox Signal 2013; 19:2105-14. [PMID: 23642070 DOI: 10.1089/ars.2013.5380] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
SIGNIFICANCE Ascorbic acid and sodium-dependent vitamin C transporters (SVCT) have been shown to have important functions in the peripheral nervous system (PNS). Ascorbic acid is known to promote myelination in vitro in Schwann cell/dorsal root ganglion co-cultures by the formation of a collagen- and laminin-containing extracellular matrix. RECENT ADVANCES Recently, the function of ascorbic acid and SVCT2 in the PNS has been shown in vivo as well. Several studies on ascorbic acid treatment of Charcot-Marie-Tooth neuropathy 1A (CMT1A) have been completed and showed no clinical benefit. CRITICAL ISSUES Possible reasons for the failure of ascorbic acid in CMT1A treatment are discussed in this review. More preclinical trials, ideally using different animal models, should be considered before the initiation of clinical trials in humans. More knowledge about ascorbic acid transport kinetics and inter-individual differences in humans is necessary for future studies. FUTURE DIRECTIONS Further research into ascorbic acid transport mechanisms in the PNS is warranted. Especially the effects of transgenic or pharmacologic SVCT2 up-regulation on PNS myelination and remyelination will be an interesting area of research in the future. Furthermore, the potential use of ascorbic acid for peripheral neuropathies other than CMT1A would be a possible future research direction.
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Affiliation(s)
- Burkhard Gess
- 1 Department of Neurology, Clinic for Sleep Medicine and Neuromuscular Disorders, University of Muenster , Muenster, Germany
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Mladenovic J, Milic Rasic V, Keckarevic Markovic M, Romac S, Todorovic S, Rakocevic Stojanovic V, Kisic Tepavcevic D, Hofman A, Pekmezovic T. Epidemiology of Charcot-Marie-Tooth Disease in the Population of Belgrade, Serbia. Neuroepidemiology 2011; 36:177-82. [DOI: 10.1159/000327029] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 03/03/2011] [Indexed: 11/19/2022] Open
Affiliation(s)
- J Mladenovic
- PCR Center, Faculty of Biology, University of Belgrade, Belgrade, Serbia
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van der Linden MH, Kalkman JS, Hendricks HT, Schillings ML, Zwarts MJ, Bleijenberg G, van Engelen BGM. Ambulatory disabilities and the use of walking aids in patients with Hereditary Motor and Sensory Neuropathy type I (HMSN I). Disabil Rehabil Assist Technol 2009; 2:35-41. [DOI: 10.1080/17483100600995086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Nelson LM, Tanner CM, Van Den Eeden SK, McGuire VM. Peripheral Neuropathy. Neuroepidemiology 2004. [DOI: 10.1093/acprof:oso/9780195133790.003.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
This chapter focuses on peripheral neuropathy, which is the third or fourth most common neurologic disorder, even among the elderly. It begins with a description of the classification system for peripheral neuropathies. Because the underlying etiology or precipitating events of peripheral neuropathy are identifiable for the majority of affected individuals, epidemiologic research has largely focused on descriptive studies of disease frequency or on identifying the factors that modify the influence of the already existing risk factors. Three of the most common neuropathies are covered in detail: diabetic neuropathy, carpal tunnel syndrome, and Guillain–Barré syndrome. Each of these conditions is discussed in terms of distribution and risk factors, and is concluded with a discussion of future research directions to address unanswered questions. The chapter emphasizes methodologic approaches that that could be employed to improve the rigor of studies of these conditions.
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Abstract
The spectrum of hereditary neuropathies has evolved recently as a result of the exponential growth of genetic research. For the purpose of this review, we will use Charcot-Marie-Tooth (CMT), hereditary liability to pressure palsy (HNPP) and hereditary sensory and autonomic neuropathies (HSAN) to illustrate the current clinical and genetic approach to such neuropathies.
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Affiliation(s)
- Safwan S Jaradeh
- From the Department of Neurology, Medical College of Wisconsin, Milwaukee
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14
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Benstead TJ, Grant IA. Progress in clinical neurosciences: Charcot-Marie-Tooth disease and related inherited peripheral neuropathies. Can J Neurol Sci 2001; 28:199-214. [PMID: 11513338 DOI: 10.1017/s0317167100001347] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The classification of Charcot-Marie-Tooth disease and related hereditary motor and sensory neuropathies has evolved to incorporate clinical, electrophysiological and burgeoning molecular genetic information that characterize the many disorders. For several inherited neuropathies, the gene product abnormality is known and for others, candidate genes have been identified. Genetic testing can pinpoint a specific inherited neuropathy for many patients. However, clinical and electrophysiological assessments continue to be essential tools for diagnosis and management of this disease group. This article reviews clinical, electrophysiological, pathological and molecular aspects of hereditary motor and sensory neuropathies.
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Affiliation(s)
- T J Benstead
- Division of Neurology, QEII Health Sciences Centre and Dalhousie University Medical School, Halifax, Nova Scotia, Canada
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Dupré N, Cossette L, Hand CK, Bouchard JP, Rouleau GA, Puymirat J. A founder mutation in French-Canadian families with X-linked hereditary neuropathy. Can J Neurol Sci 2001; 28:51-5. [PMID: 11252295 DOI: 10.1017/s0317167100052550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND The aim of the present study was to identify the mutations in the connexin 32 gene in French-Canadian families with X-linked Charcot-Marie-Tooth disease (CMTX). METHODS Molecular analysis was performed by nonisotopic single strand conformation polymorphism (SSCP) analysis and sequencing. Clinical evaluation was carried out according to the scale defined by the European Hereditary Motor and Sensory Neuropathy Consortium. RESULTS In one family, the mutation Arg142Trp was located in the transmembrane domain III whereas, in four other families we identified a novel mutation (Ser26Trp) located in the transmembrane domain I of the connexin 32 gene. Haplotype analysis revealed that these four families are related and suggests a founder mutation. Sixteen patients from these four families were studied. As expected, all the affected males were more clinically affected than the females and all affected patients exhibited some electrophysiological characteristics of demyelination. CONCLUSION Our study suggests that the Ser26Trp mutation may cause a primary demyelinating neuropathy that is not associated with a specific clinical phenotype. We also find evidence that the majority of kindreds share a common ancestor.
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Affiliation(s)
- N Dupré
- Laboratoire de Recherche en Génétique Humaine, CHU Laval, Ste-Foy, Québec, Canada
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Darin N, Tulinius M. Neuromuscular disorders in childhood: a descriptive epidemiological study from western Sweden. Neuromuscul Disord 2000; 10:1-9. [PMID: 10677857 DOI: 10.1016/s0960-8966(99)00055-3] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A retrospective epidemiological study of neuromuscular disorders was carried out in children born between 1979 and 1994 in western Sweden. The purpose was to determine overall and specific prevalences, overall cumulative incidence and birth incidences of selected disorders. Cases were ascertained from 12 different sources and medical records, investigations and diagnosis were reviewed. We found a point prevalence in the population < 16 years of age of 63.1 x 10(-5) for all neuromuscular disorders and 53.1 x 10(-5) for inherited neuromuscular disorders. The point prevalence in children of school age was even higher. We found a higher occurrence of hereditary motor and sensory neuropathy, congenital myopathies and mitochondrial encephalo-myopathy, a slightly lower occurrence of Duchenne muscular dystrophy and spinal muscular atrophy and equal occurrence of myotonic dystrophy compared to previous studies in other countries. We conclude that neuromuscular disorders are more common in childhood than has previously been reported.
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Affiliation(s)
- N Darin
- Department of Paediatrics, Sahlgrenska University Hospital-Ostra, Göteborg, Sweden
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17
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Meretoja P, Silander K, Kalimo H, Aula P, Meretoja A, Savontaus ML. Epidemiology of hereditary neuropathy with liability to pressure palsies (HNPP) in south western Finland. Neuromuscul Disord 1997; 7:529-32. [PMID: 9447611 DOI: 10.1016/s0960-8966(97)00100-4] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An epidemiological study of hereditary neuropathy with liability to pressure palsies (HNPP) was carried out in south western Finland, with a population of 435,000. The diagnosis was established in 69 patients from 23 unrelated families through family and medical history, clinical neurological and neurophysiological examinations and with documentation of the deletion at gene locus 17p11.2 in at least one member of each family. This gave a prevalence of at least 16/100,000, which is remarkably high. However, due to the insidious nature of HNPP, most probably it is still an underestimation. This is the first population-based prevalence figure reported for HNPP. The prevalence is somewhat lower than that obtained for CMT in the same population, which agrees with the proposal that HNPP and CMT 1A are reciprocal products of the same unequal crossing-over. The clinical pictures of our patients were, in general, similar to those previously described in HNPP.
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Affiliation(s)
- P Meretoja
- Department of Clinical Neurophysiology, University Central Hospital of Turku, Finland
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Affiliation(s)
- C N Martyn
- MRC Environmental Epidemiology Unit, Southampton University, Southampton General Hospital, UK
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Nelis E, Holmberg B, Adolfsson R, Holmgren G, van Broeckhoven C. PMP22 Thr(118)Met: recessive CMT1 mutation or polymorphism? Nat Genet 1997; 15:13-4. [PMID: 8988161 DOI: 10.1038/ng0197-13] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Goto T, Hurford WE. Postoperative acute respiratory failure following thoracotomy in a patient with Charcot-Marie-Tooth disease. J Clin Anesth 1994; 6:434-6. [PMID: 7986519 DOI: 10.1016/s0952-8180(05)80019-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We present the case of a patient with Charcot-Marie-Tooth (CMT) disease who required prolonged ventilatory support following a thoracotomy due to respiratory muscle weakness. Although CMT was traditionally believed to affect only skeletal muscles, recent evidence suggests that respiratory involvement is relatively common, even in the absence of pulmonary symptoms. Assessment of respiratory muscle strength using measurements of vital capacity and negative inspiratory force is helpful in evaluating pulmonary reserve in patients with CMT.
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Affiliation(s)
- T Goto
- Department of Anesthesia, Massachusetts General Hospital, Boston
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Holmberg BH, Holmgren G, Nelis E, van Broeckhoven C, Westerberg B. Charcot-Marie-Tooth disease in northern Sweden: pedigree analysis and the presence of the duplication in chromosome 17p11.2. J Med Genet 1994; 31:435-41. [PMID: 8071969 PMCID: PMC1049919 DOI: 10.1136/jmg.31.6.435] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Sixty-seven patients in 29 families with the diagnosis of Charcot-Marie-Tooth disease or hereditary motor and sensory neuropathy in northern Sweden were examined by pedigree and DNA analysis for the CMT1a duplication within chromosome 17p11.2. There were 39 patients in nine families with Charcot-Marie-Tooth type 1 and autosomal dominant inheritance and in all these cases the duplication was seen. In six patients in three families with Charcot-Marie-Tooth type 1 the pedigrees strongly suggested autosomal recessive inheritance. In two patients DNA analysis was not informative but in the others no duplication was shown. There were also 11 "sporadic" patients and one pair of sibs classified as Charcot-Marie-Tooth type 1, but there was no duplication shown although in four patients DNA analysis was not informative. In nine patients with Charcot-Marie-Tooth type 2 from five families and in 13 unaffected relatives of Charcot-Marie-Tooth patients the CMT1a duplication was not found.
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Affiliation(s)
- B H Holmberg
- Department of Neurology, University Hospital, Umeå, Sweden
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