17 year-old male with hydrocephalus, status post ventriculoperitoneal shunt Stable in size of the ventricles is observed when compared to the prior examinations on coronal view images. The slightly increased in size represent on axial view may be secondary to acquisition position difference between the studies. Right frontal ventriculostomy catheter is unchanged in position, with distal tip at the level of the third ventricle. The fourth ventricle remains dilated, with bilateral cerebellar encephalomalacia, which is stable. Suboccipital craniotomy, with adjacent dystrophic calcifications is also stable. Redemonstration of the encephalomalacia in left frontal periventricular white matter, consistent with previous instrumentation change. No evidence of acute intracranial hemorrhage, midline shift or hydrocephalus. Gray-white matter differentiation is preserved. The visualized paranasal sinuses and mastoid air cells are well-pneumatized. There is redemonstration of C1 congenital platybasia.
1. Interval stable in size of the supratentorial ventricular system, as described above. The slightly increased in size represent on axial view may be secondary to acquisition position difference between the studies. 2. Stable in position of the right ventriculostomy catheter. Postsurgical changes, and stable encephalomalacia in the posterior fossa. 