Question 1

do all arachnoid cysts cause slight compression? how could a doctor tell if a cyst is causing compression by just looking at a scan? left parietal lobe arachnoid cyst 30mm by 18mm?

Accepted Answer

: If the cyst is big enough it may compress the brain or spine but it most often does not cause any symptoms. Yes, we can tell the compression when we look at the CT or MRI brain images. Base of the clinical symptoms and the images, we will decide if the cyst needs to be taken care of.

Question 2

what symptoms would a 2cm arachnoid cyst in the right parietal region (extending inferolaterally to the frontal parietal region) cause?

Accepted Answer

Parietal area: If the problem were to cause symptoms. You would expect symptoms of tingling, numbness or weakness on the left side of your body.

Question 3

found arachnoid cyst in non contrast mri? chances of misdiagnosis? can arachnoid cyst hide like a tumor underneath or be a tumor? how easy are these identified without contrast.

30 mm * 18 mm left parietal region

advice on cyst pleasee :?

Accepted Answer

EXPLANATION?: Arachnoid cysts are not uncommon, and involve congenital, lifetime, usually benign and incidental lesions.  These are NOT "brain tumors" and in most cases cause no notable symptoms.  Most radiologist reports reflect accuracy from MRI

Question 4

my neuro says he is sure there is slight compression of an arachnoid cyst that is 30mm by 18mm left parietal lobe, how can he tell? my mri mentioned just the size but a ct mentioned discrete mass effect 8 months later, does this mean growth?

Accepted Answer

: Tough to compare size on CAT scan vrs MRI.  Since you appear so worried and focused, suggest you see a neurosurgeon for a second opinion regarding the best ways to objectify and manage this arachnoid cyst.

Question 5

did a mri non contrast and a ct contrast about 8 months apart both normal except for arachnoid cyst small in left parietal lobe. ct says 10mm thick and discrete mass effect but the mri did not just said 30mm by 18 mm arachnoid cyst? indicates growth?

Accepted Answer

: The report of the second study should have directly commented on whether the change is significant and indicates significant enlargement of the cyst. Discuss with your doctor, who in turn may want to have a discussion with the radiologist.

Question 6

heard the term arachnoid cyst- info please. ?

Accepted Answer

Spinal fluid balloon: Arachnoid is a membrane in the nervous system which is in contact with spinal fluid. Sometimes the fluid is entrapped in folds of the arachnoid causing a pocket of fluid to form either in skull or spinal canal. At times the cyst can enlarge causing brain or spinal cord compression. Arachnoid cysts can be present at birth or develop later.

Question 7

my granddaughter got diagnosed with an arachnoid cyst.  what happens to such a baby?

Accepted Answer

More details please: The location and size of the cyst impact the treatment decisions.
Is this a primary or secondary cyst>
how old is your granddaughter and is she having symptoms? Was this cyst present at birth? Please resubmit your question with more details and also talk with the physician who made the diagnosis.
Sometimes it helps to write down your three most important concerns and ask the doctor.

Question 8

i have been diagnosed with a arachnoid cyst, what can i do besides surgery to live with this?

Accepted Answer

Likely benign: Arachnoid cysts are congenital lesions and if you have made it into adulthood, it is unlikely to need any intervention .  If surgery is recommended, make sure to find out why as unless there are progressive neurological deficits directly attributable to the cyst,  surgery is not indicated.

Question 9

at what size is an arachnoid cyst considered large?

Accepted Answer

: Usually 3cm and above is considered large enough to be treated but a smaller size can become a problem depending on the location. Most arachnoid cysts do not need treatment

Question 10

what is the definition or description of: arachnoid cyst?

Accepted Answer

Arachnoid cyst: Arachnoid cyst =   collection of fluid  within the arachnoid membrane - which covers the brain or spinal cord.

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Doctor answers about:

Parietal arachnoid cyst

A member asked:

Do all arachnoid cysts cause slight compression? how could a doctor tell if a cyst is causing compression by just looking at a scan? left parietal lobe arachnoid cyst 30mm by 18mm?

A member asked:

What symptoms would a 2cm arachnoid cyst in the right parietal region (extending inferolaterally to the frontal parietal region) cause?

A member asked:

Found arachnoid cyst in non contrast mri? chances of misdiagnosis? can arachnoid cyst hide like a tumor underneath or be a tumor? how easy are these identified without contrast. 30 mm * 18 mm left parietal region advice on cyst pleasee :?

A member asked:

My neuro says he is sure there is slight compression of an arachnoid cyst that is 30mm by 18mm left parietal lobe, how can he tell? my mri mentioned just the size but a ct mentioned discrete mass effect 8 months later, does this mean growth?

A member asked:

Did a mri non contrast and a ct contrast about 8 months apart both normal except for arachnoid cyst small in left parietal lobe. ct says 10mm thick and discrete mass effect but the mri did not just said 30mm by 18 mm arachnoid cyst? indicates growth?

A member asked:

Heard the term arachnoid cyst- info please. ?

A member asked:

My granddaughter got diagnosed with an arachnoid cyst. what happens to such a baby?

A member asked:

I have been diagnosed with a arachnoid cyst, what can i do besides surgery to live with this?

A member asked:

At what size is an arachnoid cyst considered large?

A member asked:

What is the definition or description of: arachnoid cyst?

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