Mega cisterna magna

Case contributed by Dr David Cuete

Patient Data

Age: 40
Gender: Female

CT Brain

CSF density space posterior to the cerebellum. 

Case Discussion

This either represents an arachnoid cyst of mega cisterna magna; distinguishing between the two can be difficult. 

Mega cisterna magna is a benign variant of development in the the cistern is enlarged, seen in 1-3% of population. Since it communicates with the subarachnoid space, is not associated with hydrocephalus

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Case information

rID: 26363
Published: 17th Dec 2013
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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