Presentation
A boy with ataxia and developmental delay
Patient Data
Age: 20 months
Gender: Male
From the case:
Dandy Walker malformation
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Evidence of vermis aplasia associated with enlarged posterior fossa and torcular-lambdoid inversion is seen. Cystic dilation of 4th ventricle is also noted.
These findings are compatible with Dandy Walker malformation.
Case Discussion
This is a classic case of a Dandy-Walker malformation.
hypoplasia of the vermis and cephalad rotation of the vermian remnant
cystic dilatation of the fourth ventricle extending posteriorly
enlarged posterior fossa with torcular-lambdoid inversion (torcular lying above the level of the lambdoid due to abnormally high tentorium