Cystic Brain Lesions
Cystic lesions of the brain have a number of causes but ventriculomegaly and choroid plexus cyst are the most common. Usually, the location and associated abnormalities are very helpful in the differential diagnosis. For example, interhemispheric cyst is commonly related to agenesis of the corpus callosum. Likewise, ventriculomegaly and dorsal sac in the case of holoprosencephaly are often associated with other abnormalities, whereas others are mostly isolated findings. The choroid plexus cyst is always a lateral cyst located in the choroid plexus and is often isolated and not difficult to diagnose. Cystic lesions of Dandy-Walker malformations are always located in the posterior fossa.
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