A síndrome de braquidactilia-nistagmo-ataxia cerebelar é caracterizada por braquidactilia, nistagmo e ataxia cerebelar. Déficit intelectual e estrabismo também são relatados em alguns pacientes.
Introdução
O que você precisa saber de cara
A síndrome de braquidactilia-nistagmo-ataxia cerebelar é caracterizada por braquidactilia, nistagmo e ataxia cerebelar. Déficit intelectual e estrabismo também são relatados em alguns pacientes.
Escala de raridade
<1/50kMuito rara
1/20kRara
1/10kPouco freq.
1/5kIncomum
1/2k
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Sinais e sintomas
O que aparece no corpo e com que frequência cada sintoma acontece
Partes do corpo afetadas
+ 3 sintomas em outras categorias
Características mais comuns
Os sintomas variam de pessoa para pessoa. Abaixo estão as 8 características clínicas mais associadas, ordenadas por frequência.
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Genética e causas
O que está alterado no DNA e como passa nas famílias
Nenhum gene associado encontrado
Os dados genéticos desta condição ainda estão sendo catalogados.
Diagnóstico
Os sinais que médicos procuram e os exames que confirmam
Tratamento e manejo
Remédios, cuidados de apoio e o que precisa acompanhar
Onde tratar no SUS
Hospitais de referência no Brasil e o protocolo oficial do SUS (PCDT)
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[18F]Fluorodeprenyl-D2 PET as a Tool to Monitor Disease Activity in GAD65-Ab Autoimmune Encephalitis.
To evaluate [18F]fluorodeprenyl-D2 ([18F]F-DED) positron-emission tomography (PET) imaging as a biomarker of disease activity in autoimmune encephalitis (AIE) associated with glutamic acid decarboxylase 65 (GAD65) antibodies. [18F]F-DED PET was performed in 25 GAD65-AIE patients and 8 controls using dynamic (0-60 min) and static (30-60 min) acquisitions. Global astrogliosis was assessed by volumes of distribution (VT; 1-tissue-compartment model with carotid input) and standardized uptake values (SUV). Regional cerebellar and mesiotemporal (MT) uptake was normalized to global uptake (SUVr). PET measures were correlated with clinical phenotypes, MRI findings, and serum biomarkers (neurofilament light chain [sNfL], GAD65-Ab titers, and glial fibrillary acidic protein [sGFAP]). Clinical phenotypes included limbic encephalitis/temporal lobe epilepsy (LE/TLE; n = 17), stiff-person syndrome (n = 4), and cerebellar ataxia (CA; n = 4), with overlap in nine patients. Global [18F]F-DED uptake was higher in patients than controls. VT analysis showed increased cortical and MT uptake, while SUVr analysis demonstrated elevated MT uptake across the cohort. LE/TLE patients exhibited increased MT uptake, and CA patients showed higher cerebellar uptake. [18F]F-DED uptake did not correlate with sNfL or GAD65-Ab titers, but sGFAP showed associations with cerebellar and white-matter uptake. Regional uptake correlated with clinical severity in LE/TLE (MT lobe) and CA (cerebellar white matter). [18F]F-DED PET reveals region-specific astrogliosis corresponding to clinical manifestations and disease severity in GAD65-AIE, supporting its potential as a monitoring tool for disease activity.
Neuroblastoma-associated opsoclonus-myoclonus-ataxia syndrome: an important yet overlooked diagnosis in pediatric ataxia.
Opsoclonus-myoclonus-ataxia syndrome (OMAS) is a rare, immune-mediated neurological disorder, often associated with neuroblastoma (NB) in children. This study aimed to describe the clinical features, diagnostic challenges, treatment, and outcomes of pediatric patients with NB-associated OMAS. We retrospectively reviewed medical records of seven children diagnosed with NB-associated OMAS between November 1, 2015 and January 31, 2025. Data on demographics, clinical presentation, tumor characteristics, treatment protocols, relapses, and outcomes were collected. The Mitchell-Pike OMS Rating Scale was used to assess severity. The cohort included four girls and three boys, aged 18-36 months (median 31). All had a history of infection and/or vaccination preceding symptom onset. Ataxia was the most common initial symptom (6/7, 85.7%), followed by behavioral disturbances and sleep disorders (5/7, 71.4% each). At presentation, opsoclonus was present in two patients, which was initially misdiagnosed as nystagmus. All but one patient had opsoclonus during the disease course. Neuroblastomas were located in abdominal (n=4), thoracic (n=1), and sacral (n=2) regions; all tumors measured.
Novel PCDH12 pathogenic missense variants cause neurodevelopmental disorders with ocular malformation.
Protocadherin-12 (PCDH12), a cell-adhesion protein belonging to the non-clustered protocadherin family, plays a crucial role in the establishment and regulation of neuronal connections and communication. Bi-allelic loss-of-function (LoF) variants in the PCDH12 gene have been associated with several neurodevelopmental disorders (NDDs) such as diencephalic-mesencephalic junction dysplasia syndrome, cerebral palsy, and cerebellar ataxia, often accompanied by ocular abnormalities. However, genotypes exhibit variable expressivity. Affected individuals sharing the same PCDH12 variant presenting differing phenotypic severities have posed major challenges towards identification of the underlying pathogenic mechanisms. Here, we report three affected individuals from two families, each harbouring non-truncating pathogenic missense variants in PCDH12 . The patients are compound heterozygous, with each individual carrying one extracellular [c.1742T>G (p.Val581Gly) and c.1861_2del/insCA (p.Ile621His)] and one intracellular variant [c.3370C>T (p.Arg1124Cys) and c.3445G>A (p.Asp1149Asn] on each allele. The children present with a range of phenotypes similar to those associated with LoF variants. One child exhibited microcephaly and seizures, while the two siblings displayed developmental delays and severe behavioral disorders. All three children experienced some degree of visual impairment. The missense variants provided new insights into the neurodevelopmental consequences of compromised PCDH12 function by distinguishing the specific consequences associated with dysfunction in the extracellular versus intracellular domains of PCDH12. All identified missense variants are predicted to be deleterious and destabilizing. The expression of PCDH12 in HEK293T and HeLa cells demonstrated that PCDH12 is expressed effectively, regardless of the presence of missense variants. However, the extracellular variants p.Val581Gly and p.Ile621His compromised the stability of PCDH12's homophilic adhesion. Additionally, we found evidence of an interaction between PCDH12 and the extracellular domain of the epilepsy-associated PCDH19 protein. PCDH12 extracellular missense variants also affect PCDH19 stability. Our study provides evidence that PCDH12 mediates both homophilic and heterophilic interactions. Our findings also highlight the importance of stable PCDH12-mediated adhesion, emphasizing the need to further study the functional consequences of PCDH12 missense variants on brain and visual system development.
Characterizing SCN1A -Related Disorders Using Real-World Data Across 681 Patient-Years.
SCN1A -related disorders are the single most common monogenic cause of epilepsy and represent a major focus of precision medicine efforts. In conjunction with existing prospective studies, the analysis of real-world data obtained during routine clinical care can expand upon the scale and duration of available data and contribute to the development of meaningful outcomes for clinical trials. Here, we leveraged real-world data to delineate the longitudinal disease history of 100 individuals with SCN1A -related disorders using a systematic approach. We mapped a total of 671 unique clinical terms to a standardized framework in monthly increments across 681 patient-years, including 75 terms related to seizure types. Within this cohort, 89 individuals had presumed loss-of-function variants in SCN1A based on variant type and clinical diagnosis, including those with Dravet syndrome ( N = 79) and genetic epilepsy with febrile seizures plus ( N = 10). Ten individuals had a non-Dravet developmental and epileptic encephalopathy caused by gain-of-function variants in SCN1A . By annotating seizure type and frequency in monthly time-bins, we assessed seizure burden. A median of 17 changes in seizure frequency and ten terms referring to seizure type were identified per participant. Myoclonic seizures occurred with high frequency (median >5 daily), whereas hemiclonic, focal impaired consciousness, and bilateral tonic-clonic seizures occurred more rarely (median monthly). Retrospective analysis of developmental histories showed a range of cognitive abilities. Neurodevelopmental differences were observed in 83% (83/100) of individuals, of whom 83% (69/83) demonstrated delayed language skills. Motor coordination impairments, including gait disturbance, ataxia, hypotonia, and imbalance were annotated in 69% (69/100) of participants. EEG findings varied with age; most were reported as normal before nine months of age, after which the prevalence of abnormal interictal findings increased. Individuals with different clinical syndromes had unique medication landscapes, with 554 prescriptions of 37 unique therapies. Changes in treatment coincided with the diagnosis of an SCN1A -related disorder, with an increase in cannabidiol, clobazam, and fenfluramine and reduction in sodium channel-blocker use following genetic diagnosis. In summary, we reconstructed the longitudinal disease history of SCN1A -related disorders from electronic medical records using a standardized framework for the analysis of real-world clinical data. We refine existing natural history data of SCN1A -related disorders by providing a granular landscape of seizures, comorbidities, and treatment approaches over time.
Emerging disease-modifying therapies for Angelman syndrome: A comprehensive review for pediatric neurologists.
Angelman syndrome (AS), a rare neurogenetic disorder affecting approximately 1 in 15,000 live births, results from loss of functional UBE3A gene expression and manifests with severe developmental delay, intellectual disability, absent speech, ataxia, epilepsy, and distinctive behavioral features. Until recently, only symptomatic management was available. This review provides pediatric neurologists with a comprehensive, practice-oriented overview of emerging disease-modifying therapies for AS, focusing on therapeutic approaches advancing through clinical development. The molecular pathophysiology of AS, natural history considerations critical for trial interpretation, and the current evidence for antisense oligonucleotide (ASO) therapies (ION582, GTX-102/apazunersen, rugonersen), gene replacement approaches (MVX-220), and next-generation strategies including CRISPR-based gene editing, artificial transcription factors, small molecules, and novel delivery platforms are reviewed. ASO therapies targeting the UBE3A antisense transcript represent the most clinically advanced approach, with three candidates showing proof-of-concept efficacy in Phase 1/2 studies and two advancing to pivotal Phase 3 trials. Gene replacement therapy offers potential single-administration treatment but faces challenges regarding safety, immune responses, and durability. Next-generation approaches including CRISPR activation, epigenetic editing, and blood-brain barrier-penetrating delivery systems show preclinical promise. Critical challenges include outcome measurement limitations, genotype stratification, long-term safety monitoring, and ensuring equitable access. These advances herald a transformation in AS clinical care and represent a milestone in precision pediatric neurology.
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medRxiv : the preprint server for health sciencesCharacterizing SCN1A -Related Disorders Using Real-World Data Across 681 Patient-Years.
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Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical NeurophysiologyHLA and T-Cell Receptor Investigations in Idiopathic and Paraneoplastic Opsoclonus-Myoclonus in Children.
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Movement disorders clinical practiceThe spectrum of movement disorders in neurosyphilis: A systematic review.
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical NeurophysiologyMiller Fisher Variant of Guillain-Barré Syndrome Presenting With Dysphagia and Ophthalmoplegia.
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Clinical medicine insights. Case reportsSpinocerebellar ataxia, autosomal recessive type 23 (SCAR23) with compound TDP2 variants: clinical, molecular, and quantitative follow-up.
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical NeurophysiologyGerstmann-Sträussler-Scheinker syndrome neuropathology in a Creutzfeldt-Jakob disease-like phenotype patient caused by a novel 6-OPRI sequence in the PRNP gene.
Revue neurologiqueGenetic and Epidemiological Aspects of Louis-Bar Syndrome Transmission: The Impact of Consanguineous Marriages on the Incidence of Hereditary Disorders.
Journal of mother and childBetween the Borders: Balint Syndrome as a Rare Manifestation of Posterior Circulation Stroke.
CureusNeurocognition, cerebellar functions and psychiatric features in spinocerebellar ataxia type 34: a case series.
Frontiers in computational neuroscienceFatigue Limits Motor and Cognitive Improvements after High-intensity Exercise Prior to Balance Training over Telehealth in People with Spinocerebellar Ataxia.
International journal of telerehabilitationBrain atrophy staging in spinocerebellar ataxia type 3 for clinical prognosis and trial enrichment.
EBioMedicine[Strongyloides stercoralis: a neglected and latent threat].
Nederlands tijdschrift voor geneeskundeAutoimmune cerebellopyramidal syndrome as a complex form of autoimmune cerebellar ataxia: a cohort study.
Frontiers in immunologyClinical and Genetic Profiles of 11 Chinese Patients With Angelman Syndrome.
Genetics researchMicrostructural White Matter Alterations in Angelman Syndrome: A Fixel-Based Analysis.
Autism research : official journal of the International Society for Autism ResearchRepeat Expansions in a Chilean Cohort with Adult-Onset Cerebellar Ataxia.
Cerebellum (London, England)Expanding the Early Childhood Manifestations of ITPR1 Heterozygous Variants Beyond Congenital Ataxia and Gillespie Syndrome.
Neurology. GeneticsClinical Framework for Motor Rehabilitation in Parkinsonism: Integrating Individualized and Syndrome-Specific Approaches.
Brain & NeuroRehabilitationThe cyclic nucleotide binding sites of Swiss-Cheese, the Drosophila orthologue of human PNPLA6, are required for its catalytic function.
bioRxiv : the preprint server for biologyMolecular Repositioning of Celecoxib as a Neurotherapeutic Agent in Fragile X‑Associated Tremor/Ataxia Syndrome (FXTAS).
ACS pharmacology & translational scienceOpsoclonus-Myoclonus-Ataxia Syndrome Associated with Coexisting Anti-N-Methyl-D-Aspartate Receptor and Glial Fibrillary Acidic Protein Antibodies.
Movement disorders clinical practiceProdromal Sleep Disturbances and Polysomnographic Findings in Patients With Creutzfeldt-Jakob Disease.
Brain and behaviorPost-COVID Myoclonus-Ataxia Syndrome: A Case Report of Successful Recovery With Intravenous Immunoglobulin (IVIG) Treatment.
CureusLATERAL PONTINE STROKE SYNDROME PRESENTING AS A REPEAT STROKE: A CASE REPORT.
Annals of Ibadan postgraduate medicineChronic Lymphocytic Inflammation With Pontine Perivascular Enhancement Responsive to Steroids Clinical Manifestations in Children Versus Adults.
Pediatric neurologyAn Out-of-Place Etiology: Recognizing FMR1 Premutation in the Memory Clinic.
Annals of clinical and translational neurologyHydrogen Sulfide Signaling in Neurodegenerative Movement Disorders.
Handbook of experimental pharmacologyTDP-43 suppression of ATP8A2 cryptic splicing implicates phosphatidylserine-driven neuroinflammation in ALS/FTD.
bioRxiv : the preprint server for biologyA Novel Biallelic STN1 Mutation Is Associated With Adult-Onset Multisystemic Involvement: Broadening the Mutational Spectrum in Coats Plus Syndrome.
Clinical geneticsCase Report: developmental delay and intellectual disability linked to a maternally inherited derivative chromosome 3 from a t(3;8) translocation.
Frontiers in geneticsTwo-year decline in performance on the Cerebellar Cognitive Affective Syndrome Scale in spinocerebellar ataxias.
Journal of neurologyAntibody Positive Miller-Fisher Syndrome and Acute Motor Sensory Axonal Neuropathy With Respiratory Failure: A Rare Overlap.
CureusA Novel SIL1 Variant (p.E342K) Associated with Marinesco-Sjögren Syndrome Impairs Protein Stability and Function.
International journal of molecular sciencesEffect of Aminopyridines on Oculomotor Dysfunction in Anti-GAD Ataxia: A Brief Report.
Cerebellum (London, England)Post-infectious Cytomegalovirus Rhombencephalitis in an Immunocompetent Adult: A Case Report.
CureusParaneoplastic Lambert-Eaton myasthenic syndrome associated with non-small cell lung cancer: data from the European LEMS registry and systematic review.
Neurological research and practiceDeciphering Spastic Ataxia: Clinical and Genetic Profiles.
Neurology. GeneticsImmune Checkpoint Inhibitor-Induced Miller Fisher Syndrome: A Case of Relapsing Symptoms Requiring a Slow Corticosteroid Taper.
CureusThe Cerebellar Cognitive Affective Syndrome in Essential Tremor Plus.
Cerebellum (London, England)Anti-Tr/DNER Antibody-Associated Paraneoplastic Neurological Syndrome Complicated with Warthin Tumor: a Case Report and Literature Review.
Cerebellum (London, England)Oligodendrocyte Inclusion Pathology in Fragile X-Associated Tremor/Ataxia Syndrome.
Movement disorders : official journal of the Movement Disorder SocietySystematic Phenotyping and Molecular Analysis of the Woozy Mouse: A Preclinical Model of Cerebellar Ataxia.
Molecular neurobiologyReal-world evidence supporting orphan drugs approvals for rare neuromuscular disorders in the European Union and the United States: Review of public assessment reports (2015-2025).
Current opinion in pharmacologyThe Cerebellar Neuropsychiatric Rating Scale Version 2: Development and Validation.
Cerebellum (London, England)A case series of neuro-chikungunya: unmasking the neurotropic potential of chikungunya virus.
BMC infectious diseasesNeuroichthyosis: the interplay between brain and skin.
Practical neurologyClinical Reasoning: A 50-Year-Old Male Patient With Acute Severe Sensory Deafferentation and Bilateral Ptosis With Rapid Recovery.
NeurologyCerebellar ataxia, neuropathy and vestibular areflexia syndrome (CANVAS).
Arquivos de neuro-psiquiatriaA Case of Retinopathy-Sensory Neuropathy Syndrome With a Novel Compound Heterozygous FLVCR1 Variant.
Journal of the peripheral nervous system : JPNSImmunodeficiency and hemolytic uremic syndrome: a case report.
The Turkish journal of pediatricsITPR1 Deletion in a Patient With Sensory Ataxic Neuropathy and Sjögren Syndrome.
Journal of the peripheral nervous system : JPNSEtiologies of Acute Ataxia in Children: A Systematic Review of 1167 Subjects.
Journal of child neurologyAnti-Yo positive paraneoplastic limbic encephalitis associated with nasopharyngeal carcinoma: A rare case.
Radiology case reportsNerve ultrasound, neuronopathy and cough predict sensory neuropathy patients with RFC1 expansions.
Brain communicationsBeyond Parkinson's Disease: A Narrative Review of Neuromelanin MRI in Neurodegenerative Diseases.
Journal of neuroimaging : official journal of the American Society of NeuroimagingExperience of bortezomib use in refractory autoimmune neurological disorders.
Multiple sclerosis and related disordersH263A and SCAN1/H493R mutant TDP1 block TOP1-induced double-strand break repair during gene transcription in quiescent cells and promote cell death.
Cell death & diseaseParry-Romberg syndrome associated with ataxia: description of a patient improved after neurorehabilitation.
European journal of translational myology[Opsoclonus-myoclonus-ataxia syndrome associated with St Louis virus infection in Argentina].
MedicinaCase Report: Compound heterozygous KCTD7 variants in two siblings presenting with myoclonic epilepsy and ataxia.
Frontiers in neurosciencePsychomotor and non-motor correlates of cognition in spinocerebellar ataxias Types 1, 2, 3, and 6.
Brain communicationsMulti-Center National Study of Genotype-Phenotype Correlation and Clinical Characteristics in Children and Young Adults with Friedreich's Ataxia from Serbia.
BiomedicinesAssociações
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Referências e fontes
Bases de dados externas citadas neste artigo
Publicações científicas
Artigos indexados no PubMed ligados a esta doença no grafo RarasNet — título, periódico e PMID direto da fonte, sem intermediação de IA.
- [18F]Fluorodeprenyl-D2 PET as a Tool to Monitor Disease Activity in GAD65-Ab Autoimmune Encephalitis.
- Neuroblastoma-associated opsoclonus-myoclonus-ataxia syndrome: an important yet overlooked diagnosis in pediatric ataxia.
- Novel PCDH12 pathogenic missense variants cause neurodevelopmental disorders with ocular malformation.
- Characterizing SCN1A -Related Disorders Using Real-World Data Across 681 Patient-Years.
- Emerging disease-modifying therapies for Angelman syndrome: A comprehensive review for pediatric neurologists.
- Cerebellar clinical syndromes: the triad and rating scales.
- CLIPPERS syndrome following papillary thyroid carcinoma.
- A novel homozygous missense DNAJC3 variant in syndromic juvenile-onset diabetes.
- A Review of the Ocular Phenotype and Correlation with Genotype in Poretti-Boltshauser Syndrome.
- Overlapping syndrome with concomitant mGluR2-Ab and GFAP-Ab: A case report.
Bases de dados e fontes oficiais
Identificadores e referências canônicas usadas para montar este verbete.
- ORPHA:1246(Orphanet)
- OMIM OMIM:113400(OMIM)
- MONDO:0007226(MONDO)
- GARD:971(GARD (NIH))
- Busca completa no PubMed(PubMed)
- Q16944551(Wikidata)
Dados compilados pelo RarasNet a partir de fontes abertas (Orphanet, OMIM, MONDO, PubMed/EuropePMC, ClinicalTrials.gov, DATASUS, PCDT/MS). Este conteúdo é informativo e não substitui avaliação médica.
Conteúdo mantido por Agente Raras · Médicos e pesquisadores podem colaborar