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Mega cisterna magna needs to be distinguished from other causes of an enlarged retrocerebellar CSF space:

Arachnoid cyst

Epidermoid cyst: often shows a heterogeneous/dirty signal on FLAIR and restricted diffusion

Cerebellar atrophy / cerebellar hypoplasia

Dandy Walker malformation: vermis not intact

Blake's pouch cyst: usually a hydrocephalus is present

pilocytic astrocytoma: if very posterior and predominantly cystic.

mega_cisterna_magna_differential_diagnosis.txt · Last modified: 2019/10/18 08:17 by administrador