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VERTIGO, DIZZINESS and blurred vision due to CYSTERNA MAGNA.

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Hi! I am 35 years old patientold and have been experiencing vertigo, dizziness, balance issues and blurred vision 3 weeks after a car accident that occured 2 months ago. They did an MRI of the brain and it noted that a mega cisterna magna is noted but that the ventricles and subarachnoid spaces are appropriate for my age. Ive had 3 MRIS of the brain in the past prior to this accident for headaches and both those mris never noted mega cisterna magna. My neurologist doesnt seem concerned and in fact didnt even mention it as o found it when i read the results.

He claims the dizziness, vertigo is all related to the whiplash injury and the herniated disc i have in my neck. And possibly a post concussion syndrome. Which he claims I will make a complete recovery from.

I just want to be sure this result is not indicative of a brain cyst. Particular in anchroid cyst. In addition since my prior mris of the brain did not show this i was wondering could this be a result of the accident?

Also my neurologist said that in general this radiologist over reads things as when he was reading the report he laughed.

Thank you very much for any insight you can provide.


Category: Neurologist, Medical

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Category: Pediatric Neurologist
 21 Doctors Online

Thank you for posting your query at
I have noted your symptoms and MRI brain findings.
I agree with your neurologist that mega cisterna magna is an incidental finding and there is no need to worry about it. It is found in many normal people and radiologist may not always report this finding. So, in the previous MRIs, they may have just left out a mention of this.
This is not suggestive of arachnoid cyst or any other cyst.
Your symptoms are due to injury and you would get better over time.
I hope it helps.
Feel free to discuss further,
Best wishes,
Dr. Sudhir Kumar MD (Medicine), DM (Neurology)
Senior Consultant Neurologist

Patient replied :

Thank you so much!! I very anxious about this and that's why I joined two medical sites to inquire. I'm not usually an anxious person, however since these symptoms started this also has occured. Prior to this I was very active and in shape. I assume that the dizziness I have when turning my head is coming from the neck. The neurologist thinks it's a combination or the neck and post concussion regarding the dizziness and vertigo. He noticed nystagmus but said that can come from the neck, is this so? Also been to an ent and do not have bppv.
Last question just to be certain one can not just develop the mega cisterna magna correct?

Thank you and these should be my last questions.

Thank you for getting back.

Yes, your symptoms are due to neck injury and post concussion. A neck problem usually does not cause nystagmus.

Mega cisterna magna is always from birth, and one can not just develop it.

Best wishes,

Dr. Sudhir Kumar MD (Medicine), DM (Neurology) Senior Consultant Neurologist.

Patient replied :

Thank you very much. This is very helpful. I look forward to having a resolution of these symptoms soon/)

Thank you for your appreciation!
Feel free to discuss further queries.

Dr. Sudhir Kumar
Category: Pediatric Neurologist
Senior Residency, Fellowship: DM, Neurology, CMC, Vellore, 2001
Junior Residency: MD, Internal Medicine, CMC, Vellore, 1998
Medical School: MBBS, Christian Medical College, Vellore, 1995
Dr. Sudhir Kumar and 4 other Medical Specialists are ready to help you

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