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FIG 2. Example of thyroid cartilage displacement visualized at fluoroscopy during cervical diskography in a 49-year-old man with severe neck pain radiating to his left arm and shoulder.
A, The prong deflector (arrow) lies adjacent to the right lateral margin of the thyroid cartilage (arrowheads). The cartilage is difficult to visualize as it overlies the disk spaces, uncinate processes and Lushka’s joints on the patients right.
B, With displacement of the thyroid cartilage toward the midline, the lateral margin of the cartilage is now visible (arrowheads) and can be seen, no longer overlying the lateral aspect of the disk space and no longer overlying the intended target.
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