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Axial (A and B) and sagittal (C) T2-weighted MR images reveal synovial cysts at L4–5 bilaterally, causing severe central canal stenosis in a patient with.

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Presentation on theme: "Axial (A and B) and sagittal (C) T2-weighted MR images reveal synovial cysts at L4–5 bilaterally, causing severe central canal stenosis in a patient with."— Presentation transcript:

1 Axial (A and B) and sagittal (C) T2-weighted MR images reveal synovial cysts at L4–5 bilaterally, causing severe central canal stenosis in a patient with neuroclaudication symptoms. Axial (A and B) and sagittal (C) T2-weighted MR images reveal synovial cysts at L4–5 bilaterally, causing severe central canal stenosis in a patient with neuroclaudication symptoms. A small tail is seen extending from the posterolateral aspect of the left synovial cyst to the left L4–5 facet joint (B), with associated degenerative changes of the facet joint. D, Two 22-ga 3.5-inch spinal needles are advanced with CT guidance into the posterior aspect of the L4–5 facet joints bilaterally, and a test injection of contrast confirms appropriate access to each joint, respectively. E, After forceful injection of contrast mixed with steroid, epidural extension of contrast material is seen, confirming cyst rupture. Contrast extravasation is also noted along the needle trajectory, (F). J.L. Bykowski, and W.H.W. Wong AJNR Am J Neuroradiol 2012;33: ©2012 by American Society of Neuroradiology

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