RT Journal Article SR Electronic T1 Spontaneous drainage of an ethmoidal mucocele: a possible cause of pneumosinus dilatans. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 729 OP 731 VO 12 IS 4 A1 Benedikt, R A A1 Brown, D C A1 Roth, M K A1 Geyer, C A A1 Ghaed, V N YR 1991 UL http://www.ajnr.org/content/12/4/729.abstract AB