{"title":"Chronic pain as a presenting feature of dysferlinopathy","authors":"Lucia Sanchez - Casado , Teresinha Evangelista , Juliette Nectoux , Camille Verebi , Tanya Stojkovic","doi":"10.1016/j.nmd.2024.105269","DOIUrl":"10.1016/j.nmd.2024.105269","url":null,"abstract":"<div><div>Dysferlinopathies, caused by mutations in the dysferlin gene <em>(DYSF)</em> encoding the dysferlin protein, are a clinically heterogeneous group of autosomal recessive muscular dystrophies whose phenotypic spectrum is still evolving. Here we described a patient reporting diffuse muscular pain non related to physical exercise, mimicking fibromyalgic syndrome. Electroneuromyography was normal. Magnetic resonance imaging (MRI) of skeletal muscles found fatty replacement on T1-weighted and hyperintensity on T2-weighted and short tau inversion recovery (STIR) sequences in the adductor magnus, the vastus medialis, the gastrocnemius lateralis and medialis. A significant decrease in dysferlin expression was observed by immunohistochemistry in the muscle biopsy from the deltoid, which was confirmed by Western blot (WB) analysis. Genetic testing confirmed the diagnosis of dysferlinopathy with the presence of two heterozygous variants. We report a new clinical presentation with confounding features for dysferlinopathy, posing a diagnostic dilemma and widening the clinical spectrum of dysferlin myopathies.</div></div>","PeriodicalId":19135,"journal":{"name":"Neuromuscular Disorders","volume":"46 ","pages":"Article 105269"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142971137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Madeline Schopp , Kelly Beer , Ian Cooper , Kathryn Hird , Althea Doverty , Annik Panicker , Katie Schütze , Anna Brusch , Merrilee Needham
{"title":"The relationship between patient-reported and clinician-assessed outcome measures in Inclusion body myositis - insights from a retrospective cohort study","authors":"Madeline Schopp , Kelly Beer , Ian Cooper , Kathryn Hird , Althea Doverty , Annik Panicker , Katie Schütze , Anna Brusch , Merrilee Needham","doi":"10.1016/j.nmd.2024.105272","DOIUrl":"10.1016/j.nmd.2024.105272","url":null,"abstract":"<div><div>Inclusion body myositis (IBM) is an inflammatory myopathy, characterised by slow progression of weakness, skeletal muscle atrophy, and heterogeneous clinical presentation. This variability in disease progression and presentation complicates tracking of clinical progress and intervention response in clinical trials, presenting challenges in identifying reliable outcome measures. We aimed to identify the most useful suite of clinician-assessed and patient-reported outcome measures (PROMs) for use in clinical practice and trials from a selection of the most commonly used outcome measures in IBM. We retrospectively analysed clinician-assessed outcome measures (manual muscle testing (MMT8, MMT12)), right- and left-handed grip strength, modified timed up and go (mTUG), two-minute walk test (2MWT); a clinician-administered patient-reported tool (IBM Functional Rating Scale (IBMFRS)); and PROMs including the eating assessment tool (EAT-10), and neuromuscular symptom score (NSS) from 20 participants attending a single specialist myositis clinic in Perth, Australia. Correlation analysis revealed significant correlations between the IBMFRS, MMT8, MMT12, mTUG and 2MWT (<em>p</em> < 0.05). The NSS strongly correlated with the MMT8, MMT12 and 2MWT (<em>p</em> < 0.05). Univariate regression analyses revealed that 2MWT, MMT12 and mTUG were significant predictors of the IBMFRS and NSS, and backward stepwise linear regression highlighted that the 2MWT was a significant positive predictor for the IBMFRS (<em>p</em> < 0.001). Overall, we concluded that the IBMFRS, NSS, 2MWT and mTUG models were the best predictors of patient-perceived physical function in IBM.</div></div>","PeriodicalId":19135,"journal":{"name":"Neuromuscular Disorders","volume":"46 ","pages":"Article 105272"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142971371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Holter electrocardiography findings in Fukuyama congenital muscular dystrophy","authors":"Ryo Sugiyama , Eri Takeshita , Yuko Shimizu-Motohashi , Hirofumi Komaki","doi":"10.1016/j.nmd.2024.105273","DOIUrl":"10.1016/j.nmd.2024.105273","url":null,"abstract":"<div><div>Fukuyama congenital muscular dystrophy (FCMD) is the second most common childhood-onset muscular dystrophy in Japan. However, only a few comprehensive studies have investigated cardiac complications associated with FCMD, with none on arrhythmias. The present study evaluated 78 Holter electrocardiograms from 15 patients with FCMD. No patient developed fatal arrhythmia complications, but older patients tended to have increased premature ventricular contractions (PVCs). Besides age, no risk factors were found to be associated with the presence or absence of PVCs. The average heart rate over 24 h tended to be higher in patients with FCMD than in healthy young people. Moreover, some time domain variables of heart rate variability tended to decrease from the early stages of the disease, suggesting that autonomic nervous system function might have been impaired prior to the appearance of PVCs. FCMD is a progressive disease, with affected patients suffering from increased rates of PVCs over time, which can reflect cardiac dysfunction.</div></div>","PeriodicalId":19135,"journal":{"name":"Neuromuscular Disorders","volume":"46 ","pages":"Article 105273"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142971443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ujjawal Roy , Achal Kumar Srivastava , Michael S. Cartwright , Ajay Panwar , Viraat Harsh
{"title":"Muscle ultrasound as a key in assisting the diagnosis of neuromyotonia","authors":"Ujjawal Roy , Achal Kumar Srivastava , Michael S. Cartwright , Ajay Panwar , Viraat Harsh","doi":"10.1016/j.nmd.2024.105243","DOIUrl":"10.1016/j.nmd.2024.105243","url":null,"abstract":"<div><div>Neuromyotonia or Isaacs syndrome is a rare neuromuscular disorder secondary to hyperexcitable peripheral nerves which fire continuously causing motor unit activation and manifests clinically as cramps, muscle twitches, or visible muscle contraction associated with impaired muscle relaxation. Clinical suspicion and subsequent diagnostic work-up, including electrophysiology, aid in the diagnosis. However, when contractions are not appreciated clinically, there is a high possibility of misdiagnosis. Misdiagnosis may also be attributable to a lack of knowledge of symptoms among physicians and a paucity of diagnostic modalities, hence additional tools have been sought. Here we present the case of 15-year-old girl who presented to us with complaints of painful posturing and stiffness of both hands, which was initially diagnosed and managed as dystonia without symptomatic relief. We suspected the diagnosis of neuromyotonia only after we performed neuromuscular ultrasound, which became the main guiding light to reach the diagnosis.</div></div>","PeriodicalId":19135,"journal":{"name":"Neuromuscular Disorders","volume":"46 ","pages":"Article 105243"},"PeriodicalIF":2.7,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Katherine D Mathews , Jonathan Suhl , Kristin M Conway , Amy Moore , Joyce T. Alese , Russell J Butterfield , Paul A Romitti , the Muscular Dystrophy Surveillance, Tracking and Research Network (MD STARnet)
{"title":"Respiratory function and evaluation in individuals with facioscapulohumeral muscular dystrophy in the Muscular Dystrophy Surveillance, Tracking and Research Network","authors":"Katherine D Mathews , Jonathan Suhl , Kristin M Conway , Amy Moore , Joyce T. Alese , Russell J Butterfield , Paul A Romitti , the Muscular Dystrophy Surveillance, Tracking and Research Network (MD STARnet)","doi":"10.1016/j.nmd.2024.105240","DOIUrl":"10.1016/j.nmd.2024.105240","url":null,"abstract":"<div><div>Using data from the US population-based, multisite Muscular Dystrophy Surveillance, Tracking, and Research Network (MD STAR<em>net</em>), we describe respiratory testing and insufficiency among people with facioscapulohumeral muscular dystrophy (FSHD) diagnosed during 2008-2016. We calculated frequencies and proportions for selected outpatient respiratory assessments (pulmonary function tests [PFTs], forced vital capacity (FVC), inspiratory/expiratory pressure, and polysomnograms) and abnormal test results. We examined frequencies by disease characteristics (FSHD type, ages of onset, non-ambulatory status, scoliosis, lordosis), obesity, and number of health encounters. Of 170 people with FSHD, 20.0% underwent PFTs during 2008-2016. Polysomnograms were infrequent (14.1%). FVC <80% predicted was recorded for 64.7% of people tested; additional respiratory outcomes were rare (<5%). Frequency of evaluations and respiratory insufficiency were higher among those with known risk factors and longer follow-up. We observed low proportions of respiratory testing among all confirmed cases of FSHD, but relatively high proportions of mild respiratory insufficiency among those tested. The higher proportions of testing among people with conditions that increase risk of respiratory complications suggest targeted monitoring. Broad implementation of the FSHD guidelines recommending all individuals receive baseline respiratory evaluation at diagnosis could identify respiratory insufficiency as a complication of FSHD.</div></div>","PeriodicalId":19135,"journal":{"name":"Neuromuscular Disorders","volume":"46 ","pages":"Article 105240"},"PeriodicalIF":2.7,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142695779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}