Welcome to the forum UKDad.
It’s unbelievable the way people so often get correspondence in total tech-speak without any translation.
You’ve not said, but I’m wondering if the lesions in your brain and spine have been described as ‘demyelinating’. MS lesions are demylinating, ie they are caused when inflammation in your central nervous system attacks the myelin. Myelin is the substance that normally protects the nerves so when it’s attacked neurological symptoms appear.
IgG is immunoglobulin. I’m not certain what relation the levels of IgG have to the diagnosis of MS.
When you say ‘unique bands in CSF’, do your letters say these are Gadolinium bands? If so, that does have implications for MS, many people with MS have gadolinium bands present in their spinal fluid, but not in their blood serum. So unique bands in your CSF would be part of an MS diagnosis, although not everyone has unmatched bands and equally on their own, they don’t prove MS.
Certainly the treatment for an MS relapse is usually high dose steroids. The aim is to stop the inflammation in the nervous system and so bring the relapse to an early end. The steroids are unreliable, they don’t always work, but when taken early enough they stand a good chance of working.
You’ve said MS usually hits one side, I don’t believe thats necessarily true. MS is a strange disease, it affects each of us differently. So it’s impossible to state categorically that MS does X or doesn’t do Y.
None of these factors in isolation are definitive proof of MS. In fact it’s possible that even in combination they don’t prove MS. It is a matter of waiting to see what the neurologist has to say.
Obviously, I am not an expert. I’m just someone who’s had MS for quite a long time.
I hope some of this amateur information helps. Of course, we often say not to Google MS, symptoms or diagnosis; we should also say that trusting a random stranger on this forum is equally unreliable. So treat what I’ve written with utmost scepticism. If you need to look up specific terms, diagnosis or symptoms, try looking at the MS Trust or indeed, the MS Society.
Best of luck, let us know what happens. And of course, if you end help, just continue posting on here.