RT Journal Article SR Electronic T1 Epidural pneumatosis associated with spontaneous pneumomediastinum. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 271 OP 272 VO 14 IS 1 A1 S Balachandran A1 F C Guinto A1 P Goodman A1 F M Cavallo YR 1993 UL http://www.ajnr.org/content/14/1/271.abstract AB