((GJ)) I read your request with much interest, or I should say interest in Tarlov cysts so I looked it up. Of course, there are tons of web sites with information, but I just started reading one and it struck a chord with me.
I'm curious where your's is located. I belong to a pretty private tailbone forum (YES! If you can believe it, there are even those.) because of constant tailbone pain and it is not pleasant.
It just makes me wonder.
Anyway, you may find this link interesting! I did. This poor woman went through a lot. But the other pages at the web site are interesting as well.
A Physician in Pain