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Cerebellar hypoplasia is a developmental disorder characterized by the incomplete or underdevelopment of the cerebellum. It may be genetic or occur sporadically. Cerebellar hypoplasia may be caused by thyroid abnormalities, environmental influences such as drugs and chemicals or viral infections or stroke. In infancy, symptoms may include developmental delay, hypotonia, ataxia, seizures, mental retardation and involuntary eye movements (nystagmus). At later ages, symptoms include headache, vertigo, imbalance, and hearing impairment. Cerebellar hypoplasia may be associated with other disorders including Dandy Walker syndrome, Werdnig-Hoffman syndrome and Walker-Warburg syndrome.
There is no standard course of treatment for cerebellar hypoplasia. Treatment is symptomatic and supportive.
Cerebellar hypoplasia is a progressive disorder.
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