title: Periodontoid pannus migration into the spinal canal with reduction of rheumatoid atlantoaxial subluxation: a case report.
abstract: We report a patient with rheumatoid arthritis in whom periodontoid pannus migrated into the spinal canal with reduction of atlantoaxial subluxation. In this case, magnetic resonance imaging in the extension position was valuable for determining the therapeutic strategy.
authors.affiliation: Department of Orthopaedic Surgery, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama 930-0194, Japan.
authors.forename: Eiko
authors.initials: E
authors.lastname: Kosaka
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Ishihara
authors.forename: Ryusuke
authors.initials: R
authors.lastname: Osada
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nakamura
authors.forename: Tomoatsu
authors.initials: T
authors.lastname: Kimura
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000150:complications / Q000175:diagnosis*; D001268:Atlanto-Axial Joint / Q000473:pathology / Q000601:surgery*; D019299:Decompression, Surgical / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D004204:Joint Dislocations / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D007593:Joint Instability / Q000150:complications / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D009809:Odontoid Process / Q000473:pathology*; D018570:Risk Assessment; D013117:Spinal Cord Compression / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D016896:Treatment Outcome