Bilateral temporal arachnoid cysts
A 1 year old child. ? delayed milestones.
Non Contrast CT brain
Loading Stack -
0 images remaining
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.
2 case questions available
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.