RT Journal Article SR Electronic T1 Extraosseous spinal chordoma: radiographic appearance. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 205 OP 207 VO 14 IS 1 A1 G Sebag A1 J Dubois A1 A Beniaminovitz A1 A Lelouch-Tubiana A1 F Brunelle YR 1993 UL http://www.ajnr.org/content/14/1/205.abstract AB The authors describe a chordoma arising within the soft tissues of the spinal canal (rather than from a vertebral body) in a 6-year-old boy. The lesion was entirely extradural as shown by CT and MR; this was confirmed at surgery.