I think I remember the blue book from when I started with SSDI. If
I'm remembering this correctly, it was one of the reasons I was able
to get Disability, because Epilepsy (which I have) was listed in it. I
don't remember if hydrocephalus was listed, but that was another
reason that I was able to get SSDI-because I already had a "permanent
medical condition". (They were wording it differently, but I don't remember
the term(s) they used).

I'll look through all the links and hopefully, I'll find something that will help
me.

Thanks, ladies!