Dandy-Walker malformation with dysgenesis of the corpus callosum and arachnoid cyst

Case contributed by Dr Ammar Haouimi


Increased head circumference with axial hypotonia.

Patient Data

Age: 1 year
Gender: Male

MRI sequences demonstrate an enlarged posterior fossa with cystic dilatation of the 4th ventricle, communicating with an enlarged posterior peri-cerebellar space through a vermian hypoplasia. Mild anterolateral displacement of the cerebellar hemispheres. Dilatation of the 3rd, and lateral ventricles with dysgenesis of the corpus callosum. Extra-axial cystic lesion of CSF signal on all sequences is noted in the left middle cerebral fossa (arachnoid cyst).

Case Discussion

Classic features of a Dandy-Walker malformation with associated hydrocephalus, dysgenesis of the corpus callosum, and arachnoid cyst.


Additional contributor: Karima Chennaf, radiographer CIM "Aurès" Batna, Algeria

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Case information

rID: 69785
Published: 21st Jul 2019
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included
Institution: Aurès Medical Imaging Center - Batna Algeria

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