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001     281817
005     20251114102931.0
024 7 _ |a 10.1002/mds.30328
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024 7 _ |a 0885-3185
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024 7 _ |a 1531-8257
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037 _ _ |a DZNE-2025-01199
041 _ _ |a English
082 _ _ |a 610
100 1 _ |a Indelicato, Elisabetta
|0 0000-0003-0217-8630
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245 _ _ |a GAA-FGF14 Expansions and CACNA1A Variants: Phenotypic Overlap and Diagnostic Implications.
260 _ _ |a New York, NY
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520 _ _ |a An intronic (GAA)•(TTC) repeat expansion in FGF14 was recently identified as the cause of spinocerebellar ataxia 27B (SCA27B), a disorder presenting with both chronic cerebellar ataxia and episodic symptoms. The phenotype of SCA27B overlaps with that of CACNA1A spectrum disorders.The objective of this work was to investigate the prevalence of GAA-FGF14 repeat expansions in patients with ataxia so far considered to be related to underlying CACNA1A variants.This is a cross-sectional multicenter study.GAA-FGF14 testing showed pathogenic expansions (≥250 repeats) in 6/67 (9%) patients carrying CACNA1A variants. All patients with a pathogenic GAA-FGF14 expansion had a disease onset >40 years and carried variants of uncertain significance (VUSs) in CACNA1A. Genetic reevaluation led to the reclassification of CACNA1A VUSs as likely benign in four of six patients, who were ultimately diagnosed with SCA27B.Late-onset ataxia cases previously considered as CACNA1A-related disorder should be reevaluated and tested for SCA27B, particularly if related to a VUS in CACNA1A. © 2025 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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650 _ 7 |a CACNA1A
|2 Other
650 _ 7 |a GAA‐FGF14 ataxia
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650 _ 7 |a SCA27B
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650 _ 7 |a episodic ataxia
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650 _ 7 |a spinocerebellar ataxia 27B
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650 _ 7 |a CACNA1A protein, human
|2 NLM Chemicals
650 _ 7 |a fibroblast growth factor 14
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650 _ 7 |a Fibroblast Growth Factors
|0 62031-54-3
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650 _ 7 |a Calcium Channels
|2 NLM Chemicals
650 _ 2 |a Humans
|2 MeSH
650 _ 2 |a Male
|2 MeSH
650 _ 2 |a Female
|2 MeSH
650 _ 2 |a Middle Aged
|2 MeSH
650 _ 2 |a Cross-Sectional Studies
|2 MeSH
650 _ 2 |a Adult
|2 MeSH
650 _ 2 |a Fibroblast Growth Factors: genetics
|2 MeSH
650 _ 2 |a Phenotype
|2 MeSH
650 _ 2 |a Aged
|2 MeSH
650 _ 2 |a Calcium Channels: genetics
|2 MeSH
650 _ 2 |a Spinocerebellar Ataxias: genetics
|2 MeSH
650 _ 2 |a Spinocerebellar Ataxias: diagnosis
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700 1 _ |a Fleszar, Zofia
|0 P:(DE-2719)9000074
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700 1 _ |a Pellerin, David
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700 1 _ |a Nachbauer, Wolfgang
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700 1 _ |a Zuchner, Stephan
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700 1 _ |a Traschütz, Andreas
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700 1 _ |a Amprosi, Matthias
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700 1 _ |a Schöls, Ludger
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700 1 _ |a Haack, Tobias B
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700 1 _ |a Brais, Bernard
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700 1 _ |a Boesch, Sylvia
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700 1 _ |a Synofzik, Matthis
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773 _ _ |a 10.1002/mds.30328
|g Vol. 40, no. 10, p. 2262 - 2268
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