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Related to arachnoidal: Arachnoid villi, arachnoid cyst


Relating to the arachnoid membrane, or arachnoidea.
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Patient discussion about arachnoidal

Q. What is the treatment for an arachnoid cyst? My 15 year old son has just been diagnosed with an arachnoid cyst. What is the treatment? Is an operation necessary?

A. An operation is not always necessary, it depends on the size and location of the cyst. I suggest you take your son to a neurologist or a neurosurgeon for further consult.

Q. info on arachnoid cyst in the right posterior fossa

A. Basically it's like a small sac filled with fluid. The problem is that the skull is a rigid closed space, which means that if there's something other than the brain, it'll occupy space, usually on expense of the brains' space. These kinds of problems are often referred to as "space occupying lesion".

It's usually congenital (i.e. develops during pregnancy), and even when it cause symptoms they develop slowly.

YOu can read more here (

Q. Is there any problem, if an arachnoid cyst ,2cmx1.5cm size, rostral to cerebellar region left untreated? symptoms: repeated headaches, twitching of muscles, tiredness

A. An arachnoid cyst that leads to symptoms usually needs treatment. Mild symptoms as you suggested are ok to left untreated however gradual onset of new symptoms may arise such as seizures, paralysis and other complications, therefore once symptoms occur one should consider treatment.

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References in periodicals archive ?
Our research showed tumor volume, margins, intraoperative signs of arachnoidal and pial invasion to be associated with PTBE in intracranial meningiomas.
Blood vessel wall was not changed in comparison with D2; however, border arachnoidal cells were highly positive (panel (d)).
have reviewed the MRI findings in 4 patients with ONG and have found that double-intensity tubular thickening characteristic of perineural arachnoidal gliomatosis, elongation of the nerves and downward kinking of the nerves in the mid-orbit are typical imaging findings on MRI.
A small dural and arachnoidal incision was made and a 2 to 3 mm segment of polyethylene tubing connected to a micropipette was inserted caudally through the durotomy.
Chronic subdural hemorrhage into a giant arachnoidal cyst (Galassi classification type IH).
Jennie was born with an arachnoidal cyst on the left side of her brain.
INTRODUCTION: Meningiomas are histologically benign tumors of the intracranial and intraspinal compartments arising from meningothelial cells of arachnoid layers (Arachnoidal cap cells) surrounding central nervous system.
These included patient 1 with a multiloculated cyst, possibly of arachnoidal origin (Figure 1, A), in which innumerable S100-positive nerve rootlets were entrapped in cyst wall.
Pacchionian granulations are hypertrophic arachnoidal villi, which can erode through cranial bone, causing lytic lesions on skull roentgenograms or computed tomography (CT) scans.