Dandy-Walker malformation

Case contributed by Huda B. Gharbia
Diagnosis almost certain

Presentation

Macrocephaly, developmental delay.

Patient Data

Age: 6 months
Gender: Male
mri

Abnormal posterior fossa with a large cystic space of CSF signal intensity continuous with dilated fourth ventricle, hypoplasia of cerebellar vermis, cephalad rotation of the vermian remnant and elevated torcular.

Case Discussion

Triad of enlargement of the posterior fossa, cystic dilatation of fourth ventricle and hypoplasia of cerebellar vermis, suggestive of Dandy-Walker malformation.

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