Question

Dandy-Walker malformation presents as a massively dilated 4th ventricle and an absent cerebellar vermis. The remaining cerebellum is hypoplastic (cerebellar hemispheres) and an enlarged posterior fossa is noticeable. What is the characteristic feature of Dandy-Walker malformation?

1) Massively dilated 4th ventricle
2) Absent cerebellar vermis
3) Hypoplastic cerebellar hemispheres
4) Enlarged posterior fossa

Answer 1

The absence of the cerebellar vermis is the characteristic feature of Dandy-Walker malformation.

Step-by-step explanation:

The characteristic feature of Dandy-Walker malformation is the absence of the cerebellar vermis.

Dandy-Walker malformation is a congenital brain abnormality that affects the development of the cerebellum. It is characterized by a massively dilated 4th ventricle and a hypoplastic (underdeveloped) cerebellum, including the cerebellar hemispheres. Additionally, an enlarged posterior fossa is noticeable.

This anomaly can cause various neurological symptoms, including problems with coordination, balance, and cognitive development.