 Right frontal approach Omaya catheter with the tip not discretely visualized however appears to terminate in the right foramen of Monro. There is mild associated susceptibility along the right frontal scalp. The ventricles are stable in size. The basal cisterns remain patent. There is no midline shift or mass effect. Extensive symmetric periventricular and subcortical white matter FLAIR hyperintense signal similar in distribution to recent CT head but markedly progressed since previous MRI brain study on 3/19/2016. There is no diffusion abnormality. No extra-axial fluid collection is identified.Normal flow-voids are demonstrated in the major intracranial vascular structures.
1. Incomplete exam as above. Extensive symmetric periventricular and subcortical white matter FLAIR hyperintense signal similar to recent CT head however markedly progressed since prior MRI brain study of 3/19/2016. This is nonspecific but likely represents treatment-related changes given the symmetric distribution however evaluation is limited without intravenous contrast and other pathology is not excluded.2. Stable ventricular caliber with right frontal approach ventriculostomy catheter.