title: A vertebral extra dural chordoma at C5, possibly deriving from a clival chordoma.
abstract: BACKGROUND
  Clival chordomas are a rare type of cancer with low metastatic potential and primary metastasize to the lung or bones.
  
  
  METHODS
  This case report describes a possible metastatic, paravertebral chordoma at level C4-C5 in a patient with a past medical history of a clival chordoma.
  
  
  CONCLUSIONS
  Chordomas are unpredictable and may metastasise.
authors.affiliation: Department of Neurosurgery, Maastricht University Medical Center, PO box 5800, 6202AZ Maastricht, The Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Goes
authors.affiliation: Department of Neurosurgery, Maastricht University Medical Center, PO box 5800, 6202AZ Maastricht, The Netherlands.
authors.forename: J J
authors.initials: JJ
authors.lastname: van Overbeeke
keywords: Clivus; chordoma; metastatic; vertebral