title: Presurgical identification of extradural nerve root anomalies by coronal fat-suppressed magnetic resonance imaging: a report of six cases and a review of the literature.
abstract: In an attempt to depict the anatomy of the nerve roots, we obtained magnetic resonance (MR) images of the lumbar spine in the coronal plane with the frequency-selective fat-suppression technique. With this technique, extradural anomalies were identified in 20 (6.7%) of 300 patients. We report the appearance on coronal MR images of six surgically confirmed extradural anomalous nerve roots together with the myelography findings. These include type Ia, type Ib, and type 3 anomalies. These are readily recognized and allow detailed evaluation of the type of nerve root anomaly.
authors.affiliation: Department of Orthopaedic Surgery, Miura Municipal Hospital, Kanagawa, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Aota
authors.forename: Y
authors.initials: Y
authors.lastname: Saito
authors.forename: K
authors.initials: K
authors.lastname: Yoshikawa
authors.forename: T
authors.initials: T
authors.lastname: Asada
authors.forename: S
authors.initials: S
authors.lastname: Kondo
authors.forename: K
authors.initials: K
authors.lastname: Watanabe
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005727:Ganglia, Spinal / Q000002:abnormalities / Q000033:anatomy & histology; D006801:Humans; D008161:Lumbosacral Region; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009192:Myelography; D009408:Nerve Compression Syndromes / Q000175:diagnosis* / Q000601:surgery; D011129:Polyradiculoneuropathy / Q000175:diagnosis* / Q000601:surgery; D012585:Sciatica / Q000175:diagnosis; D013126:Spinal Nerve Roots / Q000002:abnormalities* / Q000033:anatomy & histology