- mild cerebellar vermian hypoplasia with abnormal folia pattern, abnormally dilated 4th ventricle having umbrella or bat-wing configuration and molar tooth configuration of the midbrain
- slight dilatation of the supratentorial ventricular system
- no mass lesion
- normal cortical sulci, no extra-axial collection
Conclusion
Congenital vermian hypoplasia (Joubert’s syndrome).