<% strPathPics = Session("strPathPicsL") imgBg = strPathPics + Session("strMedia") %> Non-communicatingas

Non-communicating Hydrocephalus - Aqueductal Stenosis - Case 1

A 47 year-old woman presented with confusion, headaches and gait imbalance. There was a history of meningitis as a child.

Show the Enlarged Lateral and Third Ventricles        Show the Normal Size 4th Ventricle        Show the Transependymal Edema

Axial CT scan - note the prominent enlargement of the lateral and third ventricles but with a normal size appearance of the 4th ventricle.  This pattern is one of obstructive hydrocephalus, which occurs from impaired drainage through the cerebral aqueduct (connecting the third to the fourth ventricles).  Note also the relatively effaced (i.e. small) sulci, which excludes the possibility of large due to atrophy (i.e., hydrocephalus ex vacuo).

Revised 04/21/06.
The Electronic Curriculum is copyrighted 1998,  Case Western Reserve University School of Medicine.