title: Skull Base and Cervical Spine Involvement in Jansen Syndrome: Case Report.
abstract: BACKGROUND
  Metaphyseal chondrodysplasia, Jansen type (JMD), is a rare form of endochondral ossification resulting in short limbs and dwarfism.
  
  
  METHODS
  A child presented with JMD and was found to have involvement of the cervical spine. Conservative treatment was given to the patient who at the long-term follow-up continues to have no neurological findings or cervical spine instability.
  
  
  CONCLUSIONS
  To our knowledge, this case represents the first report of involvement of the superior cervical spine in a patient with JMD. Clinicians should be aware of this potential albeit rare finding.
authors.affiliation: Seattle Science Foundation, Seattle, WA, USA.
authors.forename: Rabia
authors.initials: R
authors.lastname: Khan
authors.forename: Peter
authors.initials: P
authors.lastname: Oakes
authors.forename: Christian
authors.initials: C
authors.lastname: Fisahn
authors.forename: Brittni
authors.initials: B
authors.lastname: Burgess
authors.forename: Kristina M
authors.initials: KM
authors.lastname: Kirkpatrick
authors.forename: Rod J
authors.initials: RJ
authors.lastname: Oskouian
authors.forename: R Shane
authors.initials: RS
authors.lastname: Tubbs
authors.forename: Jeffrey P
authors.initials: JP
authors.lastname: Blount
mesh_terms: D000015:Abnormalities, Multiple; D002574:Cervical Vertebrae / Q000002:abnormalities*; D004392:Dwarfism; D006132:Growth Plate / Q000002:abnormalities*; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D010009:Osteochondrodysplasias / Q000145:classification / Q000000981:diagnostic imaging; D019291:Skull Base / Q000002:abnormalities*; D013577:Syndrome; D014057:Tomography, X-Ray Computed