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Washington University Experience | DEVELOPMENTAL MALFORMATIONS | Aqueductal Stenosis, Atresia & Septa | 9A2 Hydrocephalus, pontine septum & Hydromyelia (Case 9) 5
A thin septum occupies the distal cerebral aqueduct/proximal portion of the IV ventricle resulting in aneurysmal dilatation of the floor of the III ventricle.