This Arnold Chiari II malformation results in a variety of symptoms related to the cerebellum, and often resulting in hydrocephalus, an abnormal accumulation of cerebrospinal fluid in the brain.
For example, as pinealomas, medulloblastomas, and ependymomas enlarge - the mass of the tumor can compress nearby ventricles blocking the flow of cerebrospinal fluid which causes swelling, called hydrocephalus.
So I poured some latex on the inside and made a mold of what the shape of the brain is and then planned on the computer how I would approach the brain if this was water on the brain hydrocephalus.
And then one day I was at the hospital with my family because my dad, we know now that my dad has normal pressure hydrocephalus, but we did not know what was wrong with him at the time.