A progressive complex neurodevelopmental condition caused by variants in the CACNA1A gene. Phenotypic onset (usually) occurs around age 1 and most often includes intellectual disability but can also include epileptic encephalopathy, benign paroxysmal torticollis of infancy and paroxysmal tonic upgaze psychomotor delay, learning difficulties, absence epilepsy, episodic ataxia, and hemiplegic migraines.
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microcephaly and chorioretinopathy
MONDO:0000181
episodic ataxia type 2
MONDO:0007163
microcephaly with or without chorioretinopathy, lymphedema, or intellectual disability
MONDO:0007918
autosomal dominant primary microcephaly
MONDO:0007988
Prader-Willi syndrome
MONDO:0008300
Smith-Magenis syndrome
MONDO:0008434