Chiari II malformation: CT morphology

Case contributed by Dr Charlie Chia-Tsong Hsu

Patient Data

Gender: Male

Figure 1 a and 1b 
Mid sagittal view shows the morphological findings of Chiari II malformation including, tectal beaking (red), corpus callosum dysgenesis (orange), large mass intermedia (yellow), absence of fastigium (green), low-lying tentorium/torcular (blue),  vermian ectopia (purple) . 

Figure 2 a and 2b
Axial view shows a heart-shaped midbrain (a worthy Valentine gift). The apex of the heart correspond to the tectal beak on the sagittal view. 

Figure 3 a and 3 b
Axial view shows a funnel-shaped foramen magnum with notching of the opisthion (red arrow). There is crowding of the foramen magnum by vermian ectopia indicated by the purple arrows.

If you have not already noticed, the morphological appearance of Chiari II malformation is outlined by the colour of the rainbow.  

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Case information

rID: 18557
Case created: 12th Jul 2012
Last edited: 25th Jan 2016
Inclusion in quiz mode: Included

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