yes lissa is 100 percent correct regarding chiro on neck. but theres even scarier stuff to worry about. the nerves and the blood vessels travel close together in the neck. some studies show chiro adjustments in neck can actually cause strokes.
regarding whether a ct scan be wrong. i doubt a ct of the bones and calcium deposits would ever be wrong. where there is always a question is the discs. they are tough to diagnose even with an mri. sometimes even the mri isnt that accurate. studies have shown the ct myelogram to be the most accurate but its not the safest or most comfortable procedure.
ten years ago i had the best neurosureon in town do a 4 level fusion on my neck. he told me he wanted the best pictures he could get before the surgery. so he did mri, ct, and even the myelogram. he said each test give him more valuable info....i am pretty much pain free now in arms , neck and shoulders.
its always good to get a few opinions regarding surgery.....pete