Animation: CT/MR pair of images in patient wih hyperintensity and a bone spur.
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(A) hyperintensity in a portion of the dorsal root ganglion (*) on MRI and
(B) a bone spur (**) on the corresponding bone CT images that physically contacts the site of hyperintensity in the ganglion. Taken together the images demonstrates that a surgically treatable small bone spur is probably responsible for the persistent symptoms.
(C) The MR myelogram shows hyperintensity in the root.
(D) The absence of filling in the X-ray myelogram confirms that the brightness is attributable to hyperintensity rather than to the presence of CSF.
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