leptomeningeal cyst

a·rach·noid cyst

a fluid-filled cyst lined with arachnoid membrane, frequently situated near the lateral aspect of the lateral sulcus of cerebral hemisphere; usually congenital in origin. Synonym(s): leptomeningeal cyst

leptomeningeal cyst

A commonly used synonym for a growing skull fracture, see there.

Patient discussion about leptomeningeal cyst

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

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 (http://en.wikipedia.org/wiki/Arachnoid_cyst)

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