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A large posterior fossa cyst elevating the tentorium and straight sinus. The hypoplastic vermis is everted over the posterior fossa cyst. The cerebellar hemispheres with a winged appearance and brainstem are hypoplastic. Thinned occipital bone with occipital bossing is seen. Hypoplastic cerebellar hemispheres.
Findings are suggestive of Dandy Walker Malformation.