Chiari II malformation - subependymal heterotopia - absent septum pellucidum
Diagnosis almost certain
Presentation
Lumbar myelomeningocele.
Patient Data
Age: 1 year
Gender: Male
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Info
The MRI sequences demonstrate:
- Low lying cerebellar tonsils which are extended 10 mm below the foramen magnum
- dilated 3rd and lateral ventricles
- absent septum pellucidum
- multiple nodules isointense to the cortical grey matter on all sequences are noted along the ventricular margins, bulging into the ventricular lumen in keeping with subependymal grey matter heterotopia
Case Discussion
MRI features of Chiari II malformation with associated hydrocephalus, absent septum pellucidum, and subependymal grey matter heterotopia.
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