Bilateral temporal arachnoid cysts

Case contributed by Dr Abdel-Rahman Abdel-Halim

Presentation

A 1 year old child. ? delayed milestones.

Patient Data

Age: 1 year
Gender: Male
CT

Non Contrast CT brain

Non-contrast  CT brain scan revealed extra-axial cystic lesions seen in both middle crainal fossae, the largest one is at the left side and it measures 3.5x3 cm in its maximum tranverse diameters.

Both temporal lobes appear hypoplsatic and displaced posterioly. 

Prominent subarachnoid spaces are noted.

Case Discussion

True arachnoid cysts are the most common congenital cystic lesions in the brain, accounting for approximately 1% of intracranial mass lesions. These cysts are related to the arachnoid membranes. 

Most common site: middle cranial fossa.

Clinically : most of them are asymptomatic, but may cause hydrocephalus.

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Case information

rID: 26406
Case created: 20th Dec 2013
Last edited: 30th May 2017
Inclusion in quiz mode: Included

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