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What is Not true regarding Dandy Walker cyst ? and explain in detail?
Ans is 'c' ie Arachnoid cyst "The Dandy-Walker malformation consist of a cystic expansion of the fouh ventricle in the posterior fossa, which results from a development failure of the roof of the 4th ventricle during embryogenesis. Approximately 90% of pts. have hydrocephalus A significant number of children have associated anomalies including agenesis of the posterior cerebellar vermis and corpus callosum" - Nelson