EURORAD ESR

Case 1180

Retrodental pseudotumor in an elderly patient with os odontoideum

Author(s)
V. Katsiva, E. Kailidou, G. Michailidis, S. Zymaris(*), M. Tibishrani
 
Patient
male, 75 year(s)
 
 
  • Figure 1
    Sagital spin-echo, T1-weighted contrast-enhanced midline image of the cervical spine.

    The anterior arch of the C1 vertebra appears situated posterior in relation to the body of the axis. The os odontoideum is seen in the place of the dens, extending into the anterior rim of the foramen. The retrodental...

     
    Area of Interest: unknown; Imaging Technique: Sagital spin-echo, T1-weighted contrast-enhanced midline image of the cervical spine.;
     
     
  • Figure 2
    Sagital gradient-echo, midline image of the cervical spine.

    The mass appears hypointense and the transverse ligament greatly attenuated. Spondylotic changes are also noted.

     
    Area of Interest: unknown; Imaging Technique: Sagital gradient-echo, midline image of the cervical spine.;
     
     
  • Figure 3
    Spiral CT of the cervical spine

    The presence of os odontoideum is confirmed.

     
    Area of Interest: unknown; Imaging Technique: Spiral CT of the cervical spine;
     
     
The anterior arch of the C1 vertebra appears situated posterior in relation to the body of the axis. The os odontoideum is seen in the place of the dens, extending into the anterior rim of the foramen. The retrodental soft tissue mass shows marginal enhancement which probably represents displaced engorged venus plexus.
 
The mass appears hypointense and the transverse ligament greatly attenuated. Spondylotic changes are also noted.
 
The presence of os odontoideum is confirmed.
 
 
 
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