Presentation
Mental retardation, developmental delay.
Patient Data
Age: 10 years
Gender: Female
From the case:
Dandy-Walker malformation
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Absent/severely hypoplastic cerebellar vermis.
Cystic dilatation of the fourth ventricle extending posteriorly.
Enlarged posterior fossa with circular-lambdoid inversion.
Aqueduct stenosis with marked tri-ventricular hydrocephalus and transependymal oedema.
Case Discussion
The features are consistent with Dandy-Walker malformation with associated aqueductal stenosis and obstructive hydrocephalus.