Infant status post myelomeningocele repair

MRI of Chiari II malformation
Sagittal T1 MRI without contrast of the brain shows a small posterior fossa with downward cerebellar tonsil herniation and a small fourth ventricle. There is kinking of the spinal cord at the cervico-medullary junction. There is also agenesis of the body and rostrum of the corpus callosum.

The diagnosis was Chiari II malformation and agenesis of the corpus callosum.