RT Journal Article SR Electronic T1 Myelography of Spinal Block from Epidural Tumor: A New Approach JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 121 OP 123 VO 2 IS 2 A1 Philip B. Katz A1 Ya-Yen Lee A1 Sidney Wallace A1 Ronald D. Ray YR 1981 UL http://www.ajnr.org/content/2/2/121.abstract AB Eleven patients with spinal canal block from metastatic epidural tumor, documented with Pantopaque myelography, were given an additional injection of up to 5 cc of air. This technique forced contrast material past the block in 10 of 11 cases. It failed in one case in which symptoms had been present for 19 days. Air injection allowed visualization of more cephalad lesions and defined the superior extent of the initial obstructing lesion without the need for a lateral cervical or cisternal puncture. It caused transient discomfort but no neurologic deterioration. This technique is less painful, requires less patient cooperation, expedites localization, and does not require the special skills needed for cervical puncture.