It's a condition where there is a fluid build up in the brain. This causes the skull to expand in infants where it is not fixed. A shunt is usually inserted into the brain so the fluid can drain.
I was born with hydrocephalus,but it wasn't discovered until I was 17 months old.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi