Diskography: science and the ad hoc hypothesis.

Two editorials were sought on the subject of diskography based on the paper by Schellhas et al in this issue of the AJNR. The suspicion was that there would be divergent opinions concerning the value of diskography in general and on its value at the C2–C3 level in particular. The reliance that many spine surgeons place on diskography should make us aware of the potential value of diskography in certain well-defined clinical situations. The journal encourages the submission of papers on this subject, particularly those that are evidence-based and deal with clinical outcomes.