Patient History
History of shunted hydrocephalus, status post fall.
Findings
Right posterior parietal approach ventriculostomy catheter with the tip crossing the midline and terminating in the body of the left lateral ventricle, , similar to prior study. Compared to prior study, there has been a slight interval decrease in the caliber of the body and the posterior horns of bilateral lateral ventricles.
Stable findings of Dandy-Walker malformation including vermian aplasia, torcular elevation, and cystic enlargement of the fourth ventricle. The splenium of the corpus callosum is small in size as is the rostrum. There is no midline shift. There are no extra axial collections. There is absence of the septum pellucidum. Major flow voids are preserved.
Artifact in the right frontal region at the site of the shunt catheter, similar to prior study. Moderate to severe bilateral ethmoid, sphenoid, and maxillary mucosal opacification is again noted. Large left and minimal right mastoid effusions are stable from prior study.
Impressions
Compared to prior MRI, slight interval decrease in the caliber of body and posterior horns of bilateral lateral ventricles. Otherwise, no significant change including stable positioning of the right posterior parietal approach ventriculostomy catheter with the tip terminating in the body of the left lateral ventricle. Stable findings of Dandy-Walker malformation with partial hypoplasia of the corpus callosum and absence of the septum pellucidum.
