Well the thing is, I had some major injuries to my back bout 10 years ago, stress fractures and spondylothesis, so back then they took plenty of x-rays and bone scans of my lower back. With the specific intent of looking for problems with the lower back, how could they miss spina bifida back then, when a doc now so easily saw it show up on the x-ray?
On top of that, last summer I had yet another back injury from a wave that threw me when I was down the shore. Before this injury, I could crack my lower back by twisting, for example while sitting in a chair. After this injury, I cannot crack my back anymore. I'll twist, but nothing happens.
I'm wondering if it's possible I'm damaged the spine so that it appears to be spina bifida!