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Osteoarthritis of the posterior elements. (A) Axial CT of facet joint osteoarthritis (arrows). (B) Sagittal STIR showing edema in cervical facet joint osteoarthritis (arrow). (C) Sagittal CT showing Baastrup’s disease (arrow). (D) Interspinous bursitis (arrow) demonstrated during injection with dye and steroids of the facets joint. CT, computed tomography; STIR, short tau inversion recovery.
