Porencephalic cyst
nCongenital vs. Acquired
nClassification
nTrue porencephalic cyst- defect in generative process or migration- sylvian fissure
nPorencephalic pseudocyst- disruption of normal brain tissue (stroke, infection, etc.)
nAgenetic porencephaly-destruction of germinal matrix prior to 26th week- overlying polymicrogyria
nCalvarial remodeling
nCSF pulsations, synechiae with ball-valve effect
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