H/o porencephalic cyst . S/p Ommaya shunt. Evaluate for interval change. Examination demonstrates further enlargement of the right porencephalic cyst and the supratentorial ventricular system. There have been large areas of encephalomalacia in the bilateral cerebral hemispheres since prior exams. There has been an interval placement of a right frontal catheter, and the tip appears to be approximately within the confluence of the sinus. No hemorrhage is identified. The cerebellar hemispheres remain unchanged from prior exam.
1. Diffuse cerebral encephalomalacia which has further evolved since prior exam. Findings are compatible with ischemic injury. 2. Further enlargement of the right porencephalic cyst and the supratentorial ventricular system, which is secondary to underlying brain volume loss related to diffuse encephalomalacia versus increased intraventricular pressure. 