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Expanding the TBL1XR1 Disease Spectrum: Generalized Dystonia Associated with a New Genetic Variant
Maximilian Johannes Löw1, Felix Bernsdorff1, Christiane Weinrich1
1Department of Neurology, University Medical Center Göttingen, Göttingen, Germany.
Background:
A growing number of identified genes increasingly reveal genetic overlaps between neurodevelopmental disorders and combined dystonia syndromes.
Case Report:
We report a 61-year-old man with a neurodevelopmental disorder, mild ataxic signs and generalized dystonia who had been misdiagnosed with cerebral palsy for 40 years. Whole-exome sequencing identified a novel heterozygous pathogenic frameshift variant in TBL1XR1.
Discussion:
TBL1XR1 variants are classically associated with Pierpont syndrome and autism spectrum disorder. Although movement disorders have been reported, this case suggests generalized dystonia as a possible additional manifestation. It highlights the value of retrospective genetic phenotyping and next-generation sequencing in adults with long-standing neurodevelopmental diagnoses.
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