Mega cisterna magna, arachnoid cyst, and Dandy Walker variant | First Look MRI

Midline posterior fossa fluid collections in adults usually represent benign congenital enlargement of the the cisterna magna. Arachnoid cysts of the posterior fossa are also possible and may be indistinguishable by imaging. Think of arachnoid cyst if the fluid is asymmetric and produces significant mass effect.
Mega cisterna magna, arachnoid cyst, and Dandy Walker variant

[@drsanjaynathani2006]

Thanks for the excellent lectures , please share more videos of neuroradiology and advanced mri imaging ( eg . CSF flow studies , defecography , MRS , prostate etc ) . Thanks much

[@ozzymartinez9544]

I have a 1.5 cm i got that checked out they told me nothing to worry about

[@HAPPYPAL113]

is there also partial empty sella and tonsiller herniation on the first case?

[@dilshadahmad9913]

Bhai iski length kitni honi chahiye

[@digitalforensicsglobalsolu7966]

Hi I have MCM and I'm looking for a brain surgeon to fenestrate the posterior fossa cyst. I live in Colorado but am willing to go anywhere for treatment as I'm losing my vision. I'm 59 years old and have been suffering for many years with debilitating headaches. Thank you so much!

[@h8h81]

This is sad that nobody seems open to doing this. I managed to speak to a neurosurgeon within Kaiser who said he has done it but thinks mine is megacisterna magna. Would love to communicate with another patient in A similar situation. Maybe you can give me your contact info. Mine is 3.5*5.5*7 red, swollen eyes and terrible headaches and loosing balance/double vision.

[@souravrauthan9410]

Plsss help I have prominent cisterna magna last 2 years I am 28 years old .plssss suggest m what should I do

[@bonanza-md4yz]

Bird rat cyst acinroid vermis aka Dandy Walker Cyst

[@garybradford2852]

How big when it sould be removed

[@WatchPrayAlways]

Hello, interesting video! I have a (possibly) related personal question:
An incidental finding of an arachnoid cyst on my posterior fossa showed up on a brain CT scan I had back in 2013.
Oct 22, 2020 I had a "normal" brain MRI scan showing a mildly prominent cisterna magna and partially empty sella but no notation about arachnoid cyst of posterior fossa.
My question: is it possible they initially mistook my "mildy prominent cisterna magna" for "an arachnoid cyst of my posterior fossa" or vise versa? I think you mentioned these 2 anomalies being nearly indistinguishable from each other in this video...
I have a history of migraine with visual aura and other troubling symptoms, which is why the MRI (& MRA) was done, but they said my results are normal...or some "variant of normal" which is good news I guess.

[@Sreya-dd5or]

I have headache and took a ct scan had mega cisternae magna .. neurologist said it's normal... I dont know about it correctly

[@garybradford2852]

I have one that is 4. 7 by 8

[@kannadiga6776]

Great..Thank you

[@teeanatawmin8464]

I am 32 weeks pregnant and my baby has 12.2 mm. Is that a problem? Pls someone reply. I can not eat or sleep. Feeling vary depressed

[@Arsi-tiger007]

Sister can u tell me .. how about ur child right now

[@Arsi-tiger007]

My wife has same problem

[@teeanatawmin8464]

Hello brother. Now my 39 weeks running and in last ultra was normal. I did it 1 week before. Now the size is 9.2mm. It is getting normal Alhamdulillah.
My baby also had ventriculomegaly. Which also normal now.
Don't worry brother. Just pray for your baby. Don’t be panicked. Let it decided Allah SWT. Wish you all the best. I will give you update after my delivery

[@teeanatawmin8464]

@@Arsi-tiger007 hello

[@lokeshmunganti4132]

Sir how is your baby plse tell me I have a same problem I can't eat and sleep

[@bilmaquiquinte4750]

Necesito en español

[@dr.gayfirstlookmri]

Yes. Sometimes it is impossible to tell a mega cisterna magna from a midline arachnoid cyst.

[@samairasaam3508]

Why it happens any reason

[@samairasaam3508]

Plz reply me sir I'm warring

[@souravrauthan9410]

I have also prominent cisterna magna 8 mm plsss sir

[@adoor4067]

@@souravrauthan9410 how is your baby now??is it normal now?

[@h8h81]

What about a csf flow study? They just found a 3.5*5.5*7.5 one in my brain and the drs are saying they don't know if megacisterna or arachnoid cyst. How would they attempt surgery in some cases if there is no way to tell the difference? I am having trouble balancing and terrible headaches and went to ER three times before this mass was even discovered.

[@sajidgondal8994]

My 26 weeks pregnancy 12mm cisterna Megna men bahottttttt preshan hn Kia baby nrml ho ga?

[@samikshakaware4813]

Ab kaisa hai aapka baby

[@LifewithdesiAustralians]

apka baby theek born hva hai?

[@sajidgondal8994]

@@samikshakaware4813 ni peda hony k bad death ho gai the

[@btechid]

How about your baby now?

[@LifewithdesiAustralians]

@@sajidgondal8994 isolated mega cisterna magna tha?

[@sajidgondal8994]

Plz reply

[@JitendraKumar-tg2bo]

Right.h