I get what you are saying it's frustrating because some tests even a cat scan can't pick up or pinpoint leak because there are many places the leak can come from with no or little knowledge I know the quickest way I know is next time you see any doctor is get a serum sample jar it's a little plastic jar with a screw on lid ..when spine fluid leaks start rub your nose on sides of it DO NOT BLOW or force the fluid in just collect samples no need to refrige it just keep adding up to an ounce if it takes a month or a couple weeks or even just a week if alot ..this proves there is leak if tests confirm spine fluid only ..this also forces more testing till they do find it which can be frustrating because so many places were leak can be