Intraventricular hemorrhage with ventriculomegaly. There is marked dilatation of the third and lateral ventricles and diffuse thinning of the periventricular white matter. The fourth ventricles is also enlarged. There is a small right transfrontal ventricular catheter. There is absence of muc of the septum pellucidum and there is a thin septation that traverses the frontal horn of the left lateral ventricle. There is susceptibility effect in the bilateral occipital horns and left caudothalamic groove region. There is also susceptibility effect in right cerebellar hemisphere, with extensive encephalomalacia of the inferior right cerebellar hemisphere. There are a few other scattered foci of susceptibility effect in the vermis and left cerebellar hemisphere. There is no evidence of intracranial mass or acute infarct. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
Diffuse ventricular enlargement may represent communicating hydrocephalus and apparent periventricular leukomalacia may be related to prior germinal matrix hemorrhage with intraventricular hemorrhage. Sequela of prior right inferior cerebellar hemorrhagic infarction and smaller areas of chronic hemorrhage in the rest of the cerebellum are also apparent.