title: Foramen magnum meningioma originating from the dentate ligament.
abstract: OBJECTIVE
  The authors report a woman with a foramen magnum meningioma originating from the dentate ligament.
  
  
  METHODS
  A 72 year-old woman developed posterior neck pain and a tingling sensation in the left arm. Magnetic resonance imaging showed a well defined and homogenously enhancing mass at the foramen magnum with no dural attachment. Angiography did not demonstrate a blood supply to the tumour via the posterior meningeal branches of the vertebral artery. The mass was totally removed via a midline suboccipital approach. Intraoperatively, the mass was found to adhere to the dentate ligament without a dural attachment. Histopathology findings were consistent with the diagnosis of meningioma.
  
  
  CONCLUSIONS
  This case is the first report of a meningioma originating from the dentate ligament and the tumour may have originated from the pia-arachnoidal extension of the spinal cord to the dura.
authors.affiliation: Department of Neurosurgery, Chonnam National University Hwasun Hospital & Medical School, Gwangju, Republic of Korea.
authors.forename: Tae-Young
authors.initials: TY
authors.lastname: Jung
authors.forename: Shin
authors.initials: S
authors.lastname: Jung
authors.forename: In-Young
authors.initials: IY
authors.lastname: Kim
authors.forename: Sam-Suk
authors.initials: SS
authors.lastname: Kang
mesh_terms: D000368:Aged; D019299:Decompression, Surgical; D005260:Female; D005539:Foramen Magnum / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008022:Ligaments / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008578:Meninges / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008579:Meningioma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D019547:Neck Pain / Q000209:etiology; D019635:Neurosurgical Procedures; D010292:Paresthesia / Q000209:etiology; D011859:Radiography; D019292:Skull Base Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D013116:Spinal Cord / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D013117:Spinal Cord Compression / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D013346:Subarachnoid Space / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D016896:Treatment Outcome