RT Journal Article SR Electronic T1 Exophytic intramedullary hemangioblastoma presenting as an extramedullary mass on myelography. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 883 OP 884 VO 16 IS 4 A1 P Corr A1 T Dicker A1 M Wright YR 1995 UL http://www.ajnr.org/content/16/4/883.abstract AB Exophytic intramedullary tumors can look like extramedullary tumors on myelography, as in this case. Contrast-enhanced sagittal and axial MR shows the true origin of these tumors.