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Snapshot!

Batman

This young lady presented with a headache. She was known to have Dandy-Walker malformation (dysgenesis or agenesis of the cerebellar vermis associated with cystic dilatation of the fourth ventricle filling nearly the entire posterior fossa) with multiple intraventricular shunts in situ.

X-ray image

The scan shows a combination of hydrocephalus, large posterior fossa cyst and two intraventricular shunts, giving rise to this interesting appearance.

John Rusli
Senior Radiology Registrar
Royal Prince Alfred Hospital, Sydney, NSW

 

©MJA 1998
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