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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Does This MRI Of Brain Indicate?

I was comparing 2 of my mris. 1 from years ago states that my chiari malformation was low lying and 1cm below a line drawn between the basion and opisthion.My most recent mri states the tonsils are very low lying and extend to the superior margin of the c1 elements. Since the 2 mris were done by different measuring standards, I cannot tell if the condition has progressed. Can you tell me if the 2 mri shows progression? Thank you.
Tue, 24 Feb 2015
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Radiologist,  's  Response
Hi,
Thanks for writing in.

Chiari malformation is a congenital condition affecting the cerebellar tonsils and upper portion of spinal cord. In the first MRI there is a technical comment saying that the cerebellar tonsils are below 1 cm to a line drawn across from the basion to opisthion. In the second report there is mention of extension till the level of C 1. In such a situation, it will be better to see the images once again and draw a common reference for the distance of the tonsil to the line between basion and opisthion in both MRI scans and make a comparative conclusion. If you can make arrangements to send in both your scan (mid sagittal section) image then I will do it and give a detailed report on your progression of condition if any. Please do not worry.
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What Does This MRI Of Brain Indicate?

Hi, Thanks for writing in. Chiari malformation is a congenital condition affecting the cerebellar tonsils and upper portion of spinal cord. In the first MRI there is a technical comment saying that the cerebellar tonsils are below 1 cm to a line drawn across from the basion to opisthion. In the second report there is mention of extension till the level of C 1. In such a situation, it will be better to see the images once again and draw a common reference for the distance of the tonsil to the line between basion and opisthion in both MRI scans and make a comparative conclusion. If you can make arrangements to send in both your scan (mid sagittal section) image then I will do it and give a detailed report on your progression of condition if any. Please do not worry.