Middle cranial fossa arachnoid cyst

Case contributed by Dr Bruno Di Muzio

Presentation

Presented with sudden onset headache.

Patient Data

Age: 42
Gender: Male

There is a fluid density collection in the left middle cranial fossa ( 3.5 x 4.7 cm ) with an imperceptible wall and thinning of the overlying bone in keeping with an arachnoid cyst. This could be confirmed on follow up MRI. It exerts mass effect on the left temporal lobe and left lateral ventricle.

No evidence of acute ischaemia. No intra or extra-axial haemorrhage is seen. No hydrocephalus.

The fluid density collection in the left middle cranial fossa is again demonstrated and is in keeping with an arachnoid cyst. 

Case Discussion

Arachnoid cysts are relatively common benign lesions occurring in association with the central nervous system, both within the intracranial compartment (most common) as well as within the spinal canal. They are usually located within the subarachnoid space and contain CSF. 

PlayAdd to Share

Case information

rID: 37762
Case created: 22nd Jun 2015
Last edited: 10th Sep 2015
Tag: rmh
Inclusion in quiz mode: Included

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.