<% strPathPics = Session("strPathPicsL") imgBg = strPathPics + Session("strMedia") %> Acute Hydro

Acute Hydrocephalus from Cerebellar Stroke

A 64 year-old man presented with nausea, vomiting and right sided ataxia. He was found to have a right cerebellar stroke. Two days later, he abruptly deteriorated. He was obtunded with decerebrate posturing.

Show the Cerebellar Infarct        Show the Compressed 4th Ventricle        Show the Enlarged 3rd and Lateral Ventricles

Axial CT scan - note the hypodensity in the right cerebellum (left image) denoting the subacute stroke. However, in this case, the stroke has swelled, compressing the fourth ventricle. This then results in acute hydrocephalus (right image). The third ventricle which normally has the shape of a slit now becomes round. The temporal horns of the lateral ventricles become markedly enlarged. No sulci are seen over the convexity - they have been effaced by the underlying increase in pressure. This picture requires emergency neurosurgery and ventricular shunting.

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