Paroxysmal Kinesigenic Dyskinesia Caused by 16p11.2 Microdeletion
Background: Four cases of paroxysmal kinesigenic dyskinesia (PKD) have been reported in individuals with proximal 16p11.2 microdeletions that include PRRT2.
Case Report: We describe a fifth patient with PKD, features of Asperger’s syndrome, and mild language delays. Sanger sequencing of the PRRT2 gene did not identify any mutations implicated in PKD. However, microarray-based comparative genomic hybridization (aCGH) detected a 533.9-kb deletion on chromosome 16, encompassing over 20 genes and transcripts.
Discussion: This case underscores the importance of aCGH testing for individuals with PKD who do not have PRRT2 mutations, particularly when developmental delays, speech problems, intellectual disability, and/or autism spectrum disorder are present.
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Also Published In
- Tremor and Other Hyperkinetic Movements
More About This Work
- Academic Units
- Center for Parkinson's Disease and Other Movement Disorders
- Published Here
- January 23, 2015