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Quick Flicks: Association of Paroxysmal Kinesigenic Dyskinesia and Tics
Bettina Balint1,2,3, Sarah Wiethoff4,5, Davide Martino6
1Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology Queen Square London UK.
Background:
Paroxysmal kinesigenic dyskinesia (PKD) is a rare disorder characterised by brief attacks of chorea, dystonia, or mixed forms precipitated by sudden movement.
Methods:
Observational study with a cohort of 14 PKD patients and genetic testing for PRRT2 mutations.
Results:
In a series of 14 PKD patients seen in our clinic at the National Hospital of Neurology, Queen Square, from 2012-2017, we noted tics in 11 patients (79%), which stand in stark contrast to the estimated lifetime prevalence of tics estimated to reach 1%.
Conclusions:
The two reasons to point out this possible association are the clinical implications and the potential opportunity of a better understanding of shared pathophysiological mechanisms of neuronal hyperexcitability.
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