If you had a CT by your dentist, @Luba, it was a CBCT (cone beam CT) & you’ll need to get a more extenisve CT scan of your head & neck done though it sounds like you may have done that based on this comment you made:
Was the CT scan of your head & neck down to your hyoid bone? Many radiologists aren’t familiar w/ ES so don’t look for elongated styloid processes in scans. @JugularEagle suggested getting a your CT scan re-read by a radiologist & specifically request the styloid processes to be looked at, measured & commented on.
As @Jules said, a CT with contrast is the best way to see if you have vascular compression being caused by your styloids & possibly other structures in your neck. If you can get it done dynamically - with your head in different positions - turned left/right, looking up/down, etc., it would be even better.
Here are links to a couple of posts about Dr. Viallet -
In the second link, @rachael posted she was having ES surgery w/ Dr. Viallet in 3 months from Jan 2024 which would have been perhaps in April. I don’t believe we’ve heard back from her to know how her surgery went.