Pathogenic variants (mutations) in the CACNA1A gene cause a range of neurological and developmental disorders, including epilepsy (mild to severe), episodic ataxia (periods of unsteadiness and poor balance), hemiplegic migraines (a rare and severe type of migraine that involves weakness or paralysis on one side of the body), atypical eye movements, developmental delays, and autism spectrum disorder. The symptoms a child experiences and the severity of the disorder can vary widely and depend on the particular CACNA1A variant the child has.
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