We learned just now, from the MRI, that Byron has hydrocephalus. This is a serious side effect of the previous brain surgery. About 30% of people with hemispherectomy get hydrocephalus. It is defined as:
"The buildup of fluid in cavities called ventricles deep within the brain. The excess fluid increases the size of the ventricles and puts pressure on the brain. Cerebrospinal fluid usually flows through the ventricles and bathes the brain and spinal column. But the pressure of too much cerebrospinal fluid can damage brain tissues and cause a range of symptoms related to brain function."
Byron will have neurosurgery tomorrow morning to insert a shunt, that will drain the fluid from his brain into his stomach. This is a permanent device that will need lifelong monitoring.
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