 There is a left posterior approach shunt catheter that terminates in the third ventricle near the right foramen of Monro after traversing the left parietal region porencephalic cyst. The porencephalic cyst is not significantly changed in size. There is redemonstration of agenesis of the corpus callosum with associated high riding third ventricle and interhemispheric cyst, a parallel configuration of the lateral ventricles, and bilateral colpocephaly. There is unchanged disorganization of the left cerebral hemisphere with extensive left cerebral hemisphere polymicrogyria, primarily involving the left frontal lobe with what appears to be a thin schizencephalic cleft. There is an unchanged diffuse paucity of periventricular white matter. The major cerebral flow voids are grossly intact. There is mucosal thickening in the bilateral maxillary and ethmoid sinuses. The orbital contents are unremarkable.
1. No significant interval change in size of left parietal porencephalic cyst with a traversing catheter in position.2. Unchanged size of the ventricular system with an associated interhemispheric cyst and bilateral colpocephaly.3. Unchanged stigmata of agenesis of the corpus callosum, extensive left frontal hemisphere polymicrogyria, and left frontal schizencephaly.