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Between two vertebrae there is an intervertebral disc. In your case there is herniation or moving forward of this disc between cervical vertebrae 4 & 5 and this herniation has involved both the central and sides of the disc. This has caused narrowing of the canal through which the nerves pass and this narrowing is causing pressure on the spinal cord.
Ependymitis granularis though sounds big is a normal finding in white matter of the brain which is seen as a hyperintense area on MRI. On the other hand gliosis signifies damage to the brain matter as is seen in Alzhiemer’s and multiple sclerosis.
Your symptoms of chronic neck/arm pain and headache can be explained by the spinal findings. The brain findings have to be clinically co-related. Please discuss this with your neurologist. Hope this helps. Take care!
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