Chiari II malformation: CT morphology
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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.