RT Journal Article SR Electronic T1 Dilation of the Subarachnoid Spaces Surrounding the Cranial Nerves with Petrous Apex Cephaloceles in Usher Syndrome JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A1283 A1 T.A. Stark A1 A.M. McKinney A1 C.S. Palmer A1 R.H. Maisel A1 C.L. Truwit YR 2008 UL http://www.ajnr.org/content/early/2008/10/22/ajnr.A1283.abstract AB