title: The "dot sign".
authors.affiliation: Division of Neurosurgery, Children's Hospital of Eastern Ontario, University of Ottawa, 401 Smyth Road, Ottawa, Ont. K1H 8L1, Canada. ventureyra@cheo.on.ca
authors.forename: E C
authors.initials: EC
authors.lastname: Ventureyra
authors.forename: H
authors.initials: H
authors.lastname: Abdel Aziz
mesh_terms: D002420:Cauda Equina / Q000473:pathology*; D006801:Humans; D008159:Lumbar Vertebrae / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D009436:Neural Tube Defects / Q000473:pathology*