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Contributors NTHC drafted and revised the manuscript. CSB provided the spinal imaging and legend, and text within the body regarding the imaging. SJ provided the pathology images and legend, and text within the body regarding the histopathology. HAK reviewed and edited the manuscript.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed. This paper was reviewed by Robin Grant, Edinburgh, UK.
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