Summary
During myelographic evaluation for a suspected herniated disc, a cystic neurilemmoma in the lower lumbar region was inadvertently punctured and a contrast study of the interior of the lesion resulted. The possibility of puncture of a cystic mass should be considered in the differential diagnosis when a complete block is encountered above and below the site of needle puncture, and particularly when the contrast column demonstrates a relatively smooth biconcave appearance.
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Hyman, R.A., Liebeskind, A.L. Endocystography in cystic neurilemmoma. Neuroradiology 13, 169–171 (1977). https://doi.org/10.1007/BF00344208
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DOI: https://doi.org/10.1007/BF00344208