Clinical Reasoning: A 24-Year-Old Man With Gait Impairment, Hearing Loss, and Recurrent Fever.

We present a case study of a 24-year-old man who reported mild balance and walking difficulties for 2 years. He had a history of recurrent fever, skin lesions, headache, and elbow pain, but most of these events resolved spontaneously. There was no significant family history. On examination, we observed frontal bossing, sensorineural hearing loss, and gait ataxia. This case underscores the significance of identifying clinical indicators in patients with neurologic symptoms, particularly recurrent fever, to establish a precise and thorough differential diagnosis.

Hereditary motor and sensory neuropathy Okinawa type mimicking proximal myopathy.

Hereditary motor and sensory neuropathy with proximal dominant involvement (HMSN-P), or, Okinawa type, is a rare neuromuscular disorder characterized by proximal dominant neurogenic atrophy and distal sensory alterations with an autosomal dominant inheritance pattern. We present a case of a Brazilian woman of Okinawan ancestry, with symmetrical proximal weakness, fasciculations, absent patellar reflexes and positive familial history for the same symptoms. These findings led to genetic testing, which identified a variant in the TFG gene (c.854 C>T;p.(Pro285Leu), confirming the diagnosis of HMSN-P. HMSN-P seemed to be restricted to populations in Okinawa, however, other HMSN-P cases were described in several parts of the world, especially in South America. This case report emphasizes the importance of considering HMSN-P in patients presenting with clinical features resembling proximal myopathy, especially in individuals with Okinawan ancestry.

Prevalence and Diagnostic Journey of Friedreich's Ataxia in the State of São Paulo, Brazil.

Friedreich's Ataxia (FRDA) is the leading cause of ataxia worldwide, but data on epidemiology and diagnostic journey are scarce, particularly in Latin America. Herein we estimated the prevalence of FRDA in the most populous Brazilian state and characterized the diagnostic odyssey of the disease. We received anonymized data of patients with FRDA from advocacy groups and physicians. Prevalence was estimated dividing the number of patients by the population of the state as reported in the last census. Patients were invited to answer an online survey to describe clinical data and diagnostic journey of the disease. FRDA estimated prevalence was 0.367:100,000, with a slight predominance of women (58.2% vs 41.7%). One hundred and four patients answered the survey (mean age of 37.3 ± 13.8 years; 75.9% classical and 24.0% late onset). On average, 6.2 ± 4.1 physicians were visited before reaching the diagnosis. Mean diagnostic delay was 7.8 ± 6.7 years; no difference between classical and LOFA groups was found. Most of the patients reported unsteadiness and gait abnormalities as the first symptom. Neurologists and orthopedical surgeons were the main specialties first sought by patients. We found a prevalence of 0.36:100,000 for FRDA in the state of São Paulo, Brazil. The disease is characterized by remarkable diagnostic delay, with no relevant differences between classical and LOFA patients.

Functional ataxia in a specialized ataxia center.

BACKGROUND: Functional gait is a disorder of ambulation and balance internally inconsistent and incongruent with the phenotypic spectrum of neurological gait disorders. OBJECTIVES: This paper aims to clinically characterize patients with functional ataxia. METHODS: Patients with functional ataxia were analyzed out of 1350 patients in Ataxia Unit of the Federal University of São Paulo circa 2008 to 2022. RESULTS: Thirteen patients (1 %) presented with functional ataxia; all female, with a median age of 34.8 years. Six (46.2 %) had psychiatric comorbidities and 7 (53.8 %) endorsed a trigger. Diagnostic features included variable base and stride (100 %), "huffing and puffing" (30.7 %), knee-buckling (30.7 %), uneconomic posturing (38.5 %), tightrope walking (23 %), and trembling gait (15.4 %). Remarkably, no falls were reported in any case. 53.8 % recovered fully or partially, despite no treatment. CONCLUSIONS: Variability of base and stride are universal features of functional ataxia, yet falls are inconspicuous. Functional Ataxia is rare even in a specialized ataxia center.

What General Neurologists Should Know about Autoinflammatory Syndromes?

Autoinflammatory disorders encompass a wide range of conditions with systemic and neurological symptoms, which can be acquired or inherited. These diseases are characterized by an abnormal response of the innate immune system, leading to an excessive inflammatory reaction. On the other hand, autoimmune diseases result from dysregulation of the adaptive immune response. Disease flares are characterized by systemic inflammation affecting the skin, muscles, joints, serosa, and eyes, accompanied by unexplained fever and elevated acute phase reactants. Autoinflammatory syndromes can present with various neurological manifestations, such as aseptic meningitis, meningoencephalitis, sensorineural hearing loss, and others. Early recognition of these manifestations by general neurologists can have a significant impact on the prognosis of patients. Timely and targeted therapy can prevent long-term disability by reducing chronic inflammation. This review provides an overview of recently reported neuroinflammatory phenotypes, with a specific focus on genetic factors, clinical manifestations, and treatment options. General neurologists should have a good understanding of these important diseases.

History and national survey on reflex hammers: which is the chosen one of Brazilian neurologists?

BACKGROUND: Percussion is an important part of the neurological examination and reflex hammers are necessary to obtain it properly. OBJECTIVE: We aimed to review the historical aspects of the main reflex hammers and to define the favorite one of Brazilian neurologists. METHODS: We searched original and review articles about historical aspects of the reflex hammers in Scielo and Pubmed and conducted an online survey to investigate the favorite reflex hammer of Brazilian neurologists. RESULTS: In the first part, we describe the major milestones in the creation of the reflex hammers. Following, we exhibit the results of the online survey: Babinski-Rabiner was the most voted. CONCLUSIONS: The origins of the reflex hammers goes back long before their creation, from a basic clinical examination method: percussion. Since the description of deep tendon reflexes and the creation of percussion hammers, much has been improved in this technique. Among all the hammers surveyed, the Babinski-Rabiner was the chosen one by a significant portion of Brazilian neurologists.

ANTECEDENTES: A percussão é uma parte importante do exame neurológico e os martelos de reflexo são necessários para obtê-la adequadamente. OBJETIVO: Nós visamos revisar os aspectos históricos dos principais martelos de reflexo neurológico e definir qual é o preferido dos neurologistas brasileiros. MéTODOS: Procuramos artigos originais e artigos de revisão sobre os aspectos históricos dos martelos de reflexo na Scielo e no Pubmed, e conduzimos um questionário online para investigar qual é o preferido dos neurologistas brasileiros. RESULTADOS: Na primeira parte, descrevemos os principais marcos na criação dos martelos de reflexo. Na sequência, expomos os resultados do questionário online: Babinski-Rabiner foi o martelo mais votado. CONCLUSõES: A origem dos martelos de reflexos vem muito antes de sua criação, a partir de um método de exame clínico básico: a percussão. Desde a descrição dos reflexos tendinosos profundos e da criação de martelos de percussão, muito se aperfeiçoou sobre essa técnica. Dentre todos os martelos pesquisados, o de Babinski-Rabiner foi o escolhido por uma parcela significativa dos neurologistas brasileiros.

History and national survey on reflex hammers: which is the chosen one of Brazilian neurologists? / História e questionário nacional sobre martelos de reflexo: qual é o escolhido dos neurologistas brasileiros?

Abstract Background Percussion is an important part of the neurological examination and reflex hammers are necessary to obtain it properly. Objective We aimed to review the historical aspects of the main reflex hammers and to define the favorite one of Brazilian neurologists. Methods We searched original and review articles about historical aspects of the reflex hammers in Scielo and Pubmed and conducted an online survey to investigate the favorite reflex hammer of Brazilian neurologists. Results In the first part, we describe the major milestones in the creation of the reflex hammers. Following, we exhibit the results of the online survey: Babinski-Rabiner was the most voted. Conclusions The origins of the reflex hammers goes back long before their creation, from a basic clinical examination method: percussion. Since the description of deep tendon reflexes and the creation of percussion hammers, much has been improved in this technique. Among all the hammers surveyed, the Babinski-Rabiner was the chosen one by a significant portion of Brazilian neurologists.

Resumo Antecedentes A percussão é uma parte importante do exame neurológico e os martelos de reflexo são necessários para obtê-la adequadamente. Objetivo Nós visamos revisar os aspectos históricos dos principais martelos de reflexo neurológico e definir qual é o preferido dos neurologistas brasileiros. Métodos Procuramos artigos originais e artigos de revisão sobre os aspectos históricos dos martelos de reflexo na Scielo e no Pubmed, e conduzimos um questionário online para investigar qual é o preferido dos neurologistas brasileiros. Resultados Na primeira parte, descrevemos os principais marcos na criação dos martelos de reflexo. Na sequência, expomos os resultados do questionário online: Babinski-Rabiner foi o martelo mais votado. Conclusões A origem dos martelos de reflexos vem muito antes de sua criação, a partir de um método de exame clínico básico: a percussão. Desde a descrição dos reflexos tendinosos profundos e da criação de martelos de percussão, muito se aperfeiçoou sobre essa técnica. Dentre todos os martelos pesquisados, o de Babinski-Rabiner foi o escolhido por uma parcela significativa dos neurologistas brasileiros.

Translation, Cross-Cultural Adaptation, and Validation to Brazilian Portuguese of the Cerebellar Cognitive Affective/Schmahmann Syndrome Scale.

Cerebellar cognitive affective syndrome (CCAS) is characterized by deficits in executive functions, language processing, spatial orientation, and affect regulation in patients with cerebellar disease. The symptoms can occur isolated or along with motor and coordination symptoms. The aim of our study was to translate and culturally adapt the CCAS scale to Brazilian Portuguese and validate the scale in our population. We performed a cross-sectional study with patients with primary and secondary ataxia. The study included 111 individuals, aged between 20 and 80 years, of both genders, 20 without cognitive and/or affective complaints who participated in the pre-test phase, 40 with cerebellar disease (hereditary/neurodegenerative ataxia or acquired/secondary cerebellar ataxia), and 51 healthy controls with no evidence of cognitive impairment and no affective symptoms matched for sex, age, and educational level. The scale was translated, culturally adapted, and validated. Statistical analysis of the data was performed, with association tests, mean comparison, and ROC curve analysis. Based on the analysis of the ROC curve, optimal cutoff values ​were found for each subitem of the scale. The translated and adapted scale has good internal consistency, is reproducible, has good reliability, and has the potential to be a reliable tool for screening cognitive symptoms in patients with cerebellar disease.

Combined assessment by transcranial sonography and Sniffin' Sticks test has a similar diagnostic accuracy compared to brain SPECT for Parkinson's disease diagnosis.

OBJECTIVES: This study aimed to investigate the accuracy of TCS combined with the Sniffin' sticks olfactory test (SST-16) for differentiation between idiopathic PD patients and healthy controls compared to that of 99 mTc-TRODAT-1 SPECT (TRODAT). METHODS: A cross-sectional study included PD patients diagnosed in accordance with United Kingdom PD Society Brain Bank criteria and a control group of age and sex- matched healthy subjects. All patients were examined by a movement disorder specialist and underwent brain SPECT using TRODAT, TCS examination and SST-16 test. Receiver Operating Characteristic (ROC) curves were used to calculate cut-off points for TCS, striatal TRODAT binding potentials and SST-16. The area under the ROC curve determined the diagnostic accuracy of the method. RESULTS: Twenty patients with PD (13 males and 7 females) and nine healthy subjects were included. Median age of PD onset was 56.5 years with median disease duration of 5 years. A larger substantia nigra (SN) echogenic area was observed in the PD group (p = 0.013). SN echogenic area cut-off point of 0.22 cm2 was obtained from a ROC curve for PD diagnosis. Considering this cut-off point, TCS diagnostic accuracy was estimated at 79.2% for PD diagnosis. The cut-off value of 0.90 for striatal TRODAT binding was associated with 99% diagnostic accuracy for the diagnosis of PD. SST-16 values equal or less than 9 points showed an 85.8% diagnostic accuracy for PD diagnosis. Combination of both SST-16 and TCS improved the diagnostic accuracy to 95% for PD diagnosis. CONCLUSION: Combined SST-16 and TCS assessment was indicated as accurate for distinguishing PD patients from healthy controls. The diagnostic accuracy of TCS combined with SST-16 for differentiation between idiopathic PD patients and healthy controls is similar to that of SPECT TRODAT.