METRIZAMIDE MYELOGRAPHY OF THE EQUINE CERVICAL SPINE

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Abstract
Case histories of 14 horses with pelvic limb ataxia requiring myelography were reviewed. Because differential diagnosis requires radiography, comparisons of lesion location, radiographic techniques, and lesion patterns were studied. Survey radiography and myelography were performed under general anesthesia, with recumbent‐lateral and flexed‐lateral views of the carnial and caudal cervical spine. Metrizamide was the myelographic contrast medium. Assessment of radiography as a diagnostic aid for cervical vertebral instability and cervical stenotic myelopathy was made through the comparison of survey radiographs and myleograms, in nonflexed and flexed positions, using these criteria: width of dorsal and ventral columns of contrast medium, compression of intervertebral disc spaces, presence or absence of bone proliferation at articular facets, remodeling secondary to vertebral instability. Radiography was an adequate diagnostic aid for cervical vertebral instability and cervical stenotic myelopathy. Distribution of lesions showed C3–4 most common, with C2–3 and C4–5 following.

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