Findings:
Building of the cervical spine through the
foreman magnum in to the cranial cavity is noted.
Tip of the odontoid process is compressing
the cervicomedullary junction resulting in bowing of this structure.
There is gross cerebellar tosillar
herniation in to the cervical spine.
Normal gray and white matter signal
intensities are noted in both cerebral and cerebellar hemispheres. Both lateral
and third ventricle are grossly dilated with ballooning of the corpus callosum.
Pituitary, parasellar areas optic chiasma,
thalami, basal ganglia and pons appear normal in signal characteristics and
morphology.
There are suggestion of dysplstic
occipital bones with calcified posterior falx cerebri. CP angles are clear.
Visualized cranial nerves appear normal.
Impression:
Features in favor of Chiary I hind brain
malformation with platybasia and basilar invagination along with gross
triventricular hydrocephalus.
