US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.1.23
M. Privitera
{"title":"New Data Reveal More Americans Than Ever Have Epilepsy","authors":"M. Privitera","doi":"10.17925/USN.2018.14.1.23","DOIUrl":"https://doi.org/10.17925/USN.2018.14.1.23","url":null,"abstract":"","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"76 1","pages":"23"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67611881","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.1.25
Thapanee Somboon
{"title":"Effect of Positive Airway Pressure Therapy on Seizure Control in Patients with Epilepsy and Obstructive Sleep Apnea","authors":"Thapanee Somboon","doi":"10.17925/USN.2018.14.1.25","DOIUrl":"https://doi.org/10.17925/USN.2018.14.1.25","url":null,"abstract":"","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"25"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67611888","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.2.94
F. Chow, L. Darki, S. Beydoun
{"title":"The Challenge of Distinguishing POEMS from Chronic Inflammatory Demyelinating Polyneuropathy—Importance of Early Recognition and Diagnosis of POEMS","authors":"F. Chow, L. Darki, S. Beydoun","doi":"10.17925/USN.2018.14.2.94","DOIUrl":"https://doi.org/10.17925/USN.2018.14.2.94","url":null,"abstract":"POEMS is a rare syndrome characterized by the unique constellation of polyneuropathy, organomegaly, endocrinopathy, M-proteins, and skin changes. Correct diagnosis is often delayed in early stages of the syndrome when patients exhibit only isolated polyneuropathy due to the clinical and electrodiagnostic similarities with chronic inflammatory demyelinating polyneuropathy. We describe a case in which early suspicion for POEMS uncovered underlying malignancy, and we review the clinical, electrophysiological, pathological, and laboratory findings characteristic of POEMS. The importance of high clinical suspicion is key in the proper diagnosis and management of this complex syndrome.","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"94"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67612486","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.1.15
N. Bogdanovic
{"title":"The Challenges of Diagnosis in Alzheimer’s Disease","authors":"N. Bogdanovic","doi":"10.17925/USN.2018.14.1.15","DOIUrl":"https://doi.org/10.17925/USN.2018.14.1.15","url":null,"abstract":"Support: No funding was received in the publication of this article. Current neuropathologic examination of the brain is still the gold standard for diagnosis of Alzheimer’s disease (AD). Postmortem studies, however, have indicated that current methods for the clinical diagnosis of AD are suboptimal. Recent research has demonstrated the clinical utility of amyloid-beta positron emission tomography (PET) scans, which detect the presence of amyloid-beta plaques in the brain. In a study presented at the Alzheimer’s Association International Conference (AAIC) in London, UK, July 2017, by Nenad Bogdanovic, MD, PhD, of the University of Oslo in Norway, amyloid PET imaging was found to be a fundamental diagnostic tool for AD, establishing a definite diagnosis or excluding AD in all 50 study participants. The use of cerebrospinal fluid (CSF) amyloid testing with a higher amyloid-beta plaque threshold than that traditionally used to establish a positive finding also resulted in high diagnostic accuracy, resulting in diagnosis or exclusion in 44 of 50 participants (88%) compared with only 21 individuals (42%) using traditional cutoffs.","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"15"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67611866","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.1.35
J. Spence
{"title":"Homocysteine Lowering with B Vitamins for Stroke Prevention—A History","authors":"J. Spence","doi":"10.17925/USN.2018.14.1.35","DOIUrl":"https://doi.org/10.17925/USN.2018.14.1.35","url":null,"abstract":"Early trials of B vitamin therapy to lower plasma total homocysteine (tHcy) reported no reduction of stroke with high doses of folate/B6 and cyanocobalamin 400–1,000 μg daily. In patients with diabetic nephropathy, folate/B6 and cyanocobalamin 1,000 μg daily accelerated the decline of renal function and doubled cardiovascular events. Patients with renal failure have high cyanide levels. The French SUpplementation with FOlate, vitamin B6 and B12 and/or OMega-3 fatty acids (Su.Fol.OM3) trial—with the best renal function of the early trials and the lowest dose of cyanocobalamin (20 μg daily)—reported a 43% reduction of stroke. Then the China Stroke Primary Prevention Trial (CSPPT) reported that folic acid alone reduced stroke and was beneficial even in patients with impaired renal function. Patient-level data from the Vitamin Intervention to Prevent Stroke (VISP) and VITAmins TO Prevent Stroke (VITATOPS) trials and meta-analyses stratified by renal function and dose of cyanocobalamin confirmed that harm from cyanocobalamin among participants with renal impairment obscured the benefit of B vitamins in the early trials. It does seem that B vitamins reduce the risk of stroke. In the era of folate fortification, B12 is the main nutritional determinant of tHcy, and metabolic B12 deficiency is very common and usually missed. Therefore, folate alone is not the optimal way to lower tHcy: the use of folate (and possibly B6) with methylcobalamin or oxocobalamin should be considered.","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"35"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67612160","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.1.47
S. Beydoun, J. Rosenfeld
{"title":"Edaravone in Amyotrophic Lateral Sclerosis’Lessons from the Clinical Development Program and the Importance of a Strategic Clinical Trial Design","authors":"S. Beydoun, J. Rosenfeld","doi":"10.17925/USN.2018.14.1.47","DOIUrl":"https://doi.org/10.17925/USN.2018.14.1.47","url":null,"abstract":"Edaravone significantly slows progression of amyotrophic lateral sclerosis (ALS), and is the first therapy to receive approval by the Food and Drug Administration (FDA) for the disease in 22 years. Approval of edaravone has marked a new chapter in pharmaceutical development since the key trial included a novel strategic clinical design involving cohort enrichment. In addition, approval was based on clinical trials that had a relatively small patient number and were performed outside of the US. Edaravone was developed through a series of clinical trials in Japan where it was determined that a well-defined subgroup of patients was required to reveal a treatment effect within the study period. Amyotrophic lateral sclerosis is associated with wide-ranging disease heterogeneity (both within the spectrum of ALS phenotypes as well as in the rate of progression). The patient cohort enrichment strategy aimed to address this heterogeneity and should now be considered as a viable, and perhaps preferred, trial design for future studies. Future research incorporating relevant biomarkers may help to better elucidate edaravone’s mechanism of action, pharmacodynamics, and subsequently ALS phenotypes that may preferentially benefit from treatment. In this review, we discuss the edaravone clinical development program, outline the strategic clinical trial design, and highlight important lessons for future trials.","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"47"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67612178","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.2.108
Mukesh Dube, A. Lakhotia, Vaibhav Yadav, R. Jain
{"title":"Sporadic Hemiplegic Migraine with SCN1A Gene Mutation—A Case Report","authors":"Mukesh Dube, A. Lakhotia, Vaibhav Yadav, R. Jain","doi":"10.17925/USN.2018.14.2.108","DOIUrl":"https://doi.org/10.17925/USN.2018.14.2.108","url":null,"abstract":"Sporadic hemiplegic migraine (SHM) is a subtype of hemiplegic migraine, characterized by episodes of migraine with a reversible motor aura, without a positive family history, and is a mimicker of an atypical severe form of migraine, stroke, epilepsy, multiple sclerosis, metabolic disorders, or conversion disorder. Case presentation: We present the case of a young 28-year-old female, who had a history of recurrent reversible attacks of headache with sensory aura accompanied with left hemiparesis for the past 5 years, with no positive family history of similar symptoms. The work-up ruled out differential diagnoses and genetic work-up found a novel SCN1A gene missense variation in exon 26 (c.4855A>G; p.Met1619Val) in a case of SHM. She was discharged on flunarizine for prophylaxis. Conclusions: We describe, for the first time, a case of SHM with a mutation in the SCN1A gene.","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"108"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67612243","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.2.76
A. Rae-Grant
{"title":"Updated American Academy Guidelines on the Use of Disease-modifying Therapies in Multiple Sclerosis—What’s New?","authors":"A. Rae-Grant","doi":"10.17925/USN.2018.14.2.76","DOIUrl":"https://doi.org/10.17925/USN.2018.14.2.76","url":null,"abstract":"Support: No funding was received in the publication of this article. Recently released guidelines on the use of disease-modifying therapies (DMTs) in patients with multiple sclerosis (MS) include guidance on starting, switching, and stopping treatment. The guidelines, which were produced by a multidisciplinary panel and endorsed by the Multiple Sclerosis Association of America and the National Multiple Sclerosis Society, were presented at the American Academy of Neurology (AAN) 2018 Annual Meeting and published in Neurology. Included within the guidelines are recommendations for patients with relapsing-remitting MS, secondary progressive MS, and primary progressive MS, as well as those with clinically isolated syndrome of demyelination. In an expert interview, the lead author Alexander Rae-Grant discusses the major recommendations of the guidelines.","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"76"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67612377","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}
US neurologyPub Date : 2018-01-01DOI: 10.17925/USN.2018.14.2.98
N. Rad, S. Beydoun
{"title":"Late-onset Hereditary Transthyretin Amyloidosis in Two Patients with Acquired Demyelinating Features","authors":"N. Rad, S. Beydoun","doi":"10.17925/USN.2018.14.2.98","DOIUrl":"https://doi.org/10.17925/USN.2018.14.2.98","url":null,"abstract":"Autosomal-dominant transthyretin (TTR)-related amyloidosis usually manifests in the third to fifth decade with a length-dependent axonal neuropathy and prominent involvement of the small diameter nerve fibers. Objectives: To describe the clinical and para-clinical findings in patients with hereditary transthyretin amyloidosis (hATTR), formerly known as transthyretin-related familial amyloid polyneuropathy (TTR-FAP). Methods: Electrodiagnostic, cerebrospinal fluid (CSF), and TTR gene findings in two patients misdiagnosed with chronic inflammatory demyelinating polyneuropathy (CIDP). Results: A 78-year-old, right-handed, Caucasian male (patient 1) and a 69-year-old, right-handed, Japanese male (patient 2) were referred for late-onset sensory symptoms of the hands and feet as initial manifestations. The first patient, after several years, developed progressive leg weakness affecting his gait and balance, as well as dysautonomic complaints. The second patient had relatively rapid progression with bilateral foot drop and ambulation difficulty after a few months. In both patients, CSF findings were unremarkable. Lumbar spine magnetic resonance imaging did not reveal abnormal thickening or enhancement of the lumbar plexus and exiting nerve roots. Both patients were initially diagnosed with CIDP before being referred to our institution. Patient 2 was started on intravenous immunoglobulin by his primary neurologist, which was maintained for a year without a meaningful response. Repeat electrodiagnostic study at our institution revealed non-length-dependent axonal sensory loss and features of acquired demyelinating neuropathy. TTR gene testing identified pathogenic variants p.Val30Met or V30M, and p.Ala 117Ser or A117S, in the first and the second patient, respectively. Conclusion: hATTR can mimic CIDP clinically and electrodiagnostically. The presence of significant sensory axonal loss, rapid course, and lack of response to immunomodulation therapy should prompt consideration of this diagnosis and TTR gene testing.","PeriodicalId":90076,"journal":{"name":"US neurology","volume":"14 1","pages":"98"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67612495","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}