You might need to question the accuracy of the MRI...or even that it really is YOURS, if it doesn't show the spina-bifida. That is a strong indication that they may have mixed up your scan with someone else...seriously.

That is not something easily missed (I have spina-bifida as well). It is possible to mix up imaging with the person coming in behind you, as your name is already in the system (and they forget to put in the new patient info). Then their scan becomes your second scan...and the one on record. It is certainly worth bringing up...and easy to confirm by the doctor looking at the images itself to see if your spina bifidia is there...if not, then it's not your scan (spina-bifida doesn't go away). Kinda like looking at dental xray and yours fillings aren't there any more...lol

Just a thought.