16 year old man with history of CP in context of FAS and prematurity of 26 weeks, status post 3rd ventriculostomy. Evaluate ventricle size. Limited sequences of the brain were obtained to follow the ventricular size and assess third ventriculostomy. Dilatation of the lateral ventricles is unchanged when compared to the prior exam from 2013, again measuring 5.5 cm in ML dimension when measured in the coronal plane. The third and fourth ventricles are similarly unchanged in caliber. There is extensive cystic periventricular leukomalacia of the white matter. Diminished supratentorial white matter is also noted. Thinning of the corpus callosum is also unchanged. Mild cerebellar tonsillar ectopia again seen. No new intracranial mass or mass effect.Although the CSF flow study is technically suboptimal, there appears to be biphasic flow across the floor of the third ventricle, consistent with history of third ventriculostomy. Findings appear similar to the prior study.
1. Unchanged dilatation of the supratentorial ventricular system. 2. CSF flow study is technically suboptimal, but there appears to be biphasic flow across the floor of the third ventricle, consistent with patent third ventriculostomy. 3. Extensive cystic periventricular leukomalacia, unchanged. 