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    The risks are low, but the fact that this is a deep spinal injection means that there's about a 1-3/100 chance of infection, bleeding, or hitting a nerve.

    Discograms don't appear to injure the disk...
    Risks in cervical (neck) discography...
    You can have a painful disk in your neck and it can be missed on MRI...
    The largest study on cervical discograms and complications...
    An older article on complications of cervical discograms (prior to strict protocols being put in place)...