Installing a standard ball trailer hitch on a tow vehicle can cost $200-$500 or more. A spare tire typically costs $20-$200 or more, depending on size and type, a bolt-on spare tire carrier adds $15-$100 or more.
Hydrocephalus is the buildup of fluid in the cavities (ventricles) deep within the brain. The excess fluid increases the size of the ventricles and puts pressure on the brain. Cerebrospinal fluid normally flows through the ventricles and bathes the brain and spinal column.
True fetal hydrocephalus has a variety of causes. The most common form of isolated, obstructive hydrocephalus is so-called âaqueductal stenosis,â which is the blockage of CSF passage through the aqueduct of Sylvius. It accounts for up to 20 percent of cases of fetal hydrocephalus.