Seattle, WA

A 32-year-old female asked:

Had head ct scan with and w/o contrast. findings say all normal but possible small arachnoid cyst in anteromedial left frontal lobe. had mri w/o contrast 18 months ago with no mentions. could this have been missed? is this early brain cancer?

2 doctor answers • 2 doctors weighed in

Dr. Hiep Leanswered

Nephrology and Dialysis 44 years experience

What's the reason you had MRI and CT scan done?

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Reviewed Oct 07, 2021

Dr. Bennett Machanic

Dr. Bennett Machanic agrees1 doctor agrees

Dr. Bennett Machanicanswered

Neurology 54 years experience

An arachnoid cyst is NOT cancer and is usually very benign. Unless it is enlarging, leave it alone

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Answered Oct 07, 2021

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A 20-year-old male asked:

Confused / worried Last year did an MRI non contrast incidental arachnoid cyst found 30 mm * 18 mm without compressing brain, this year CT contrast for non-specific symptoms arachnoid cyst 10 mm "thick" and IS compressing brain? Is this growth or?

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A 20-year-old male asked:

What is better for seeing if an arachnoid cyst is compressing the brain mri non contrast vs ct contrast?

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A 25-year-old male asked:

I just had a MRI on my brain. I was told I had a cyst on my left frontal lobe. They're talking about putting me on needs what's should I look out for?

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Last updated Oct 7, 2021

Found in:

Cancer›Premature birth›Cyst

People also asked

Worried - Brain MRI w/out contrast 18 mo ago did not mention anything but recent CT w/contrast says possible small arachnoid cyst in anteriomedial frontal lobe. Could this be a tumor that grew since then?

2 doctor answers • 3 doctors weighed in

Is it possible for a 10 mm thick arachnoid cyst to be compressing the brain in the "left paretal frontal lobe region" How can a cyst be measured 18 * 30 mm (MRI) one year ago and no compression vs. 10 mm CT now with compression. Technique is MRI bett?

1 doctor answer • 1 doctor weighed in

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?

1 doctor answer • 2 doctors weighed in

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?

1 doctor answer • 1 doctor weighed in

Can brain cancer be misinterpreted as an arachnoid cyst on a CT scan w/ and w/out contrast?

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