Just a thought, (& probably not helpful to throw something else into the mix!), but several members have had SCDS- Semicircular Canal Dehiscence- which can cause disabling dizziness. It’s potentially caused by pressure eroding the bones, for example if there’s jugular compression which can raise the Intracranial pressure. Might be worth looking into, I think it should be able to be seen on a head CT by a skilled radiologist…you can search the discussions for info, but here’s one discussion:
Semicircular Canal Dehiscence - General - Living with Eagle
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