Familiar enough to be able to state unequivocally that surgery is the best and only way to treat it. You have to get that excess fluid out of there, and the only way to do that is to install a shunt to drain it away from the brain to another part of the body where it can be safely absorbed.
Fortunately, this is a relatively short and uncomplicated surgery and one that doctors have had plenty of experience with. They've been doing it on babies born with hydrocephalus for decades with great success, and I'm pretty sure that doing it on a full grown adult would be a snap by comparison.
Having it done in a world class hospital like Johns Hopkins is just about the best case scenario anyone could ask for. I'm sure elleng is going to be just fine! 
More info: https://www.hopkinsmedicine.org/neurology_neurosurgery/centers_clinics/cerebral-fluid/procedures/shunts.html
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