while i am sure there IS something out there that would describe this, i really do not totally know exactly what it is you are truely describing? it IS very hard to fully describe certain things when it comes to location or what things simply look like or compare to either. sooo, is this 'just' the very backside doing this then like within the spinous processes(just very confused as you can tell)? the one suggestion i have that may help here since this just really DOES sound to me anyways like this was something you were probably actually born with? look up "congenital spinal (or spinal column)abnormalities" or something along those lines? that 'may' possibly help? have you ever seen a good neurosurgeon for a consult/eval, or an orthosurgeon? i would think that at least one of those two specialists would more than likely actually know what this is and what created this to even begin with too? i am assuming you have actually had at least a CT, x ray or MRI at one time to even KNOW that this just is?
just exactly how old are you and how long have you known your spinal was this way? is there any other family members that also have at least "some' of what you have?
knowing what types of actual testing/films you have had so far would help, and of course what the interpretting rad mentioned in his report too? if that spinal is actually twisted as you described, certain things like the nerve roots, the cord and flow of CSF within that surrounding dura could have issues that would only be 'seeable" upon like at least an MRI being done?
are you suffering ANY actual symptoms or pain from this? it just 'sounds' like it would have at least "some' types of real consequences/signs/ symptoms to me. please let me know what you find out. good luck, FB