{"title":"What Is in the Myopathy Literature?","authors":"Michael Isfort, David Lacomis","doi":"10.1097/CND.0000000000000559","DOIUrl":"10.1097/CND.0000000000000559","url":null,"abstract":"<p><strong>Abstract: </strong>This update begins with a discussion of treatable lipid storage myopathies associated with the use of sertraline and ranolazine. We then turn to monoclonal gammopathy-associated myopathies including a more recently identified disorder that is also treatment-responsive, monoclonal gammopathy-associated glycogen storage myopathy. Several reports on statins and muscle symptoms, toxic myopathy, and immune-mediated necrotizing myopathy follow. Other autoimmune myopathy topics are highlighted. Then, muscular dystrophies are covered with a focus on dystrophinopathies, limb-girdle muscular dystrophy, and facioscapulohumeral muscular dystrophy. Pompe disease follows with a focus on enzyme replacement therapy data. A short section on congenital myopathies precedes a review of reports on myotonic dystrophies and nondystrophic myotonias.</p>","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"63-81"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Progressive Myopathy and Respiratory Failure in a 7-Year-Old Boy With m.3251A>G MT-TL1 Mutation.","authors":"Daria Hoang, Alan Pestronk, Jafar Kafaie","doi":"10.1097/CND.0000000000000547","DOIUrl":"10.1097/CND.0000000000000547","url":null,"abstract":"<p><strong>Abstract: </strong>We report a pediatric case of severe isolated mitochondrial myopathy because of the rare m.3251A>G variant of the MT-TL1 gene. A 7-year-old boy presented to the hospital with acute-on-chronic weakness and respiratory insufficiency. Initial laboratory tests were notable for elevated lactate, aldolase, and lactate dehydrogenase. Despite a negative autoimmune panel, he was presumed to have myositis and treated with steroids and intravenous immunoglobulin. He continued to deteriorate, eventually requiring intubation and ventilation. Muscle biopsy revealed numerous ragged red fibers, abnormal intracellular lipid droplets with no lymphocytic inflammation, and increased succinate dehydrogenase reactivity, reflecting mitochondrial proliferation in many fibers. Steroids were discontinued, and he was started on a mitochondrial cocktail of cofactors with clinical improvement. Genetic testing identified the m.3251A>G variant, confirming primary mitochondrial disorder. This case expands the known phenotype of the m.3251A>G mutation. We also discuss clinical and histopathological differences between mitochondrial and inflammatory myopathies.</p>","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"89-95"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Karlos Acurio, Niels Pacheco-Barrios, Irving G Calisaya-Madariaga, Fritz F Váscones-Román, Fernando Canazas-Paredes, Miguel Chuquilin
{"title":"Hereditary Myopathy With Early Respiratory Failure: A Case Report and Review of the Literature.","authors":"Karlos Acurio, Niels Pacheco-Barrios, Irving G Calisaya-Madariaga, Fritz F Váscones-Román, Fernando Canazas-Paredes, Miguel Chuquilin","doi":"10.1097/CND.0000000000000549","DOIUrl":"10.1097/CND.0000000000000549","url":null,"abstract":"<p><strong>Introduction: </strong>Hereditary myopathy with early respiratory failure (HMERF) is a rare myopathy resulting from a mutation on the TTN region of the titin gene. A case report and a thorough review of PubMed-reported cases were conducted.</p><p><strong>Design/methods: </strong>A 53-year-old man reported progressive lower extremity weakness and dyspnea. On examination, he had steppage gait and muscle strength was reduced in lower limb muscles. Electromyography showed myopathic findings in iliopsoas and gastrocnemius muscles. A lumbar magnetic resonance imaging demonstrated patchy fatty atrophy of iliopsoas and lumbar paraspinals muscles. Next-generation sequencing revealed a heterozygous titin gene (TTN) mutation c.95187 G > C (p.Trp31729Cys) consistent with the diagnosis of HMERF.</p><p><strong>Results: </strong>Fifty-eight patients of HMERF (14-78 years old) were identified. The earlier age of onset was 14 years. Most patients presented with limb muscle weakness but 11 began with an initial respiratory complaint. On average, patients required noninvasive ventilation 5.5 years postsymptom onset.</p><p><strong>Conclusions: </strong>HMERF should be considered in the differential diagnosis of an adult with concomitant respiratory and limb muscle weakness.</p>","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"112-115"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Novel Pathogenic Variants in the SBF2 Gene in Two Siblings With Charcot-Marie-Tooth Disease Type 4B2.","authors":"Aishani Vengala, Ruthwik Duvuru, Aravindhan Veerapandiyan","doi":"10.1097/CND.0000000000000550","DOIUrl":"https://doi.org/10.1097/CND.0000000000000550","url":null,"abstract":"","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"122-123"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cecilia V Mitchell, Nathan P Young, Kitty Y Wu, Steven L Moran, Gokul Arumaithurai, Christopher J Klein, James B Meiling
{"title":"Pre-Plexal Extension of Parsonage-Turner Syndrome With Nerve Root Involvement on Needle Electromyography.","authors":"Cecilia V Mitchell, Nathan P Young, Kitty Y Wu, Steven L Moran, Gokul Arumaithurai, Christopher J Klein, James B Meiling","doi":"10.1097/CND.0000000000000553","DOIUrl":"10.1097/CND.0000000000000553","url":null,"abstract":"<p><strong>Abstract: </strong>Parsonage-Turner syndrome (PTS) is an inflammatory, immune-mediated neurogenic condition characterized by acute-onset, severe unilateral shoulder/upper arm pain followed by patchy weakness and atrophy. Often described as an idiopathic brachial plexitis, most cases of PTS involve the brachial plexus or its terminal branches, and root-level or paraspinal muscle involvement is rare. Among the differential diagnoses for proximal neuropathic root involvement, cervical radiculopathy by mechanical compression of the exiting nerve roots and diabetic cervical radiculoplexus neuropathy by way of immune-mediated microvasculitis, ischemic injury, and subsequent ischemic axonal damage should be considered. The latter also shares similar symptomatology to PTS with progression with subacute, painful, asymmetric involvement of the upper limb followed by atrophy and weakness of the limb. Here, we present a case of PTS with notable findings of cervical paraspinal muscle involvement on needle electromyography, highlighting a rare proximal, pre-plexal extension of this idiopathic inflammatory immune process.</p>","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"105-107"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cassie Kuhn, Mark Bromberg, Amber Margolis, Heather Hayes
{"title":"Exploring Intimacy in Amyotrophic Lateral Sclerosis: A Pilot Study of Educational Support in a Multidisciplinary Clinic.","authors":"Cassie Kuhn, Mark Bromberg, Amber Margolis, Heather Hayes","doi":"10.1097/CND.0000000000000546","DOIUrl":"10.1097/CND.0000000000000546","url":null,"abstract":"<p><strong>Objective: </strong>This pilot study explored the feasibility and perceived usefulness of an educational intervention on intimacy delivered within a multidisciplinary ALS clinic.</p><p><strong>Methods: </strong>Individuals with ALS and their partners (if applicable) received the publicly available \"Sexuality, Intimacy & Chronic Illness\" fact sheet during routine clinic visits. A follow-up survey was conducted 4-6 weeks later to assess whether the information was informative, sufficient, and helpful. Demographic and clinical data were collected, and open-ended responses were analyzed descriptively.</p><p><strong>Results: </strong>Forty-two individuals received the fact sheet; 6 individuals and their partners (N = 12) completed follow-up surveys. Most respondents (83%) reported that ALS had impacted their intimate relationships, and 75% had discussed these changes with their partner. Half found the fact sheet informative, and 58% felt the information was sufficient. Open-ended responses revealed diverse needs, including interest in tailored content (eg, erectile dysfunction) and a desire for providers to ask permission before discussing intimacy. Caregivers described shifting roles and emotional strain, indicating that written materials alone may not fully address intimacy-related challenges.</p><p><strong>Conclusions: </strong>Integrating discussions of intimacy into ALS care is feasible and appreciated by some patients and partners. Although written educational materials may offer a useful starting point, a more personalized, consent-based approach-potentially modeled on frameworks like Ex-PLISSIT-may better address the relational needs of individuals with ALS and their caregivers. These findings support incorporating intimacy into holistic ALS care and developing guidelines to facilitate such discussions in multidisciplinary settings.</p>","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"82-88"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"To Draw Reliable Conclusions About the Demographics of COCID-19-Related and Unrelated GBS, Coherent Diagnostic Criteria Must Be Applied.","authors":"Fulvio A Scorza, Josef Finsterer","doi":"10.1097/CND.0000000000000505","DOIUrl":"https://doi.org/10.1097/CND.0000000000000505","url":null,"abstract":"","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"117-118"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An Unusual Case of Anti-FGFR3 Antibodies, Sensory Neuropathy, and Adie Pupil in a Patient With Hodgkin Lymphoma in Remission and Review of the Literature.","authors":"Sydney Peters, Wade Whitt, Alexis A Lizarraga","doi":"10.1097/CND.0000000000000545","DOIUrl":"10.1097/CND.0000000000000545","url":null,"abstract":"<p><strong>Abstract: </strong>Autoantibodies against fibroblast growth factor receptor 3 (FGFR3) are associated with sensory neuropathy. In this report, we describe the case of a woman with a remote history of Hodgkin lymphoma in remission who presented with unilateral Adie pupil, trigeminal neuropathy, and progressive sensory neuropathy. After 3 years without a known etiology and slow progression of symptoms, a trial of intravenous immunoglobulin (IVIg) was initiated and she subsequently tested positive for anti-FGFR3 antibodies. Despite the delay in treatment, she showed significant improvement with maintenance monthly IVIg therapy. In addition to the case report, we provide a review of the literature on anti-FGFR3-positive sensory neuropathy. To our knowledge, this is the first report of Adie pupil in a patient with anti-FGFR3 antibodies.</p>","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"99-104"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reece M Hass, Sandra Reiter-Campeau, Ruple S Laughlin, Teerin Liewluck
{"title":"Respiratory Onset Amyotrophic Lateral Sclerosis in a Patient With C9orf72 Expansion.","authors":"Reece M Hass, Sandra Reiter-Campeau, Ruple S Laughlin, Teerin Liewluck","doi":"10.1097/CND.0000000000000556","DOIUrl":"10.1097/CND.0000000000000556","url":null,"abstract":"<p><strong>Abstract: </strong>Respiratory-onset amyotrophic lateral sclerosis (ALS) is uncommon, accounting for less than 5% of all patients with ALS. Familial ALS is also uncommon, with the most common variant being related to a C9orf72 hexanucleotide repeat expansion. Respiratory-onset ALS in familial ALS is rare, with few cases discussed in the literature related to ERBB4, SOD1, and FUS variants. Here we present a case of respiratory-onset ALS related to a C9orf72 repeat expansion, expanding the spectrum of associated phenotypes associated with C9orf72 expansions and highlighting the importance of genetic testing in patients living with ALS.</p>","PeriodicalId":39645,"journal":{"name":"Journal of Clinical Neuromuscular Disease","volume":"27 3","pages":"96-98"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147327675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}