Enlarged posterior fossa 'CSF' space
Mega cisterna
magna • Mega cisterna magna - Ganzer Fall bei Radiopaedia
Enlarged
posterior fossa 'CSF' space • Epidermoid cyst - cerebellopontine angle - Ganzer Fall bei Radiopaedia
Arachnoid
cyst • Arachnoid cyst - posterior fossa - Ganzer Fall bei Radiopaedia
An enlarged posterior fossa 'CSF' space posterior to the cerebellum has a number of differentials that include:
Careful attention to the cerebellum needs to paid as also to be considered are:
- cerebellar atrophy
- Dandy-Walker malformations
- Blake pouch cyst
- vermian hypoplasia (Joubert anomaly)
- isolated fourth ventricle
