title: Cauda equina syndrome complicating ankylosing spondylitis: MR features.
abstract: A case of cauda equina syndrome complicating long standing ankylosing spondylitis is presented. Bony erosions were demonstrated on CT. Magnetic resonance showed arachnoid diverticula filling the erosions. Magnetic resonance obviated the need for intrathecal contrast medium injection.
authors.affiliation: Department of Radiology, State University of New York, Stony Brook, Long Island.
authors.forename: D J
authors.initials: DJ
authors.lastname: Rubenstein
authors.forename: O
authors.initials: O
authors.lastname: Alvarez
authors.forename: B
authors.initials: B
authors.lastname: Ghelman
authors.forename: P
authors.initials: P
authors.lastname: Marchisello
mesh_terms: D002420:Cauda Equina / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000175:diagnosis* / Q000209:etiology; D013167:Spondylitis, Ankylosing / Q000150:complications*