MRI of the brain 12.07.2014 CONCLUSION: external hydrocephalus. Lateral ventricles ASYMMETRICAL BRAIN L> R, Ext. Third ventricle is not expanded, the

Hydrocephalus. External hydrocephalus is a build up of cerebrospinal fluid over the surface of the brain rather than in the ventricles. Normally cerebrospinal fluid circulates from the brain to the spinal cord and back to the brain. When there is poor reabsorption or blockage then hydrocephalus (water on the brain) develops. See a neurosurgeon to help with treatment.