Findings:
A hemosiderin lined cavity is present in the right caudate nucleus, extending to the right lentiform nucleus. Consequential ex vacuo dilatation of the right lateral ventricle body. Reduced volume of the right side of the brain stem with hyperintensity of the right corticospinal tract from internal capsule through the cerebral peduncle.
A few non-specific foci of FLAIR hyperintensity are noted in bilateral cerebral white matter. No diffusion restriction.
The pituitary gland is normal.
The orbits, paranasal sinuses and mastoid air cells are clear.
No bony abnormality is seen. The craniocervical junction is normal.
Conclusion:
Known, posthaemorrhagic area of encephalomalacia involving the right basal ganglia with associated Wallerian degeneration. No acute ischaemic event.