i hope this helps it does mention hydrocephakus in toddlers further down.
Hydrocephalus in Infants and Children
Hydrocephalus in infants and young children is frequently diagnosed at birth or shortly thereafter, but sometimes it is not diagnosed until the child is a little older.
With the advent of sophisticated imaging technologies such as magnetic resonance imaging (MRI) and ultrasonography, hydrocephalus can be diagnosed in utero, before the baby is born. Read more about prenatal hydrocephalus.
Signs and Symptoms of Hydrocephalus
In an infant, the most obvious sign of hydrocephalus is an abnormal enlargement of the baby's head. The soft spot (fontanel) may be tense and bulging. The scalp may appear thin and glistening, and the scalp veins may appear to have unnatural fullness (prominence), as well. When you feel your baby's head along the suture lines, you may find that the bones are separated. Symptoms to watch for are vomiting, sleepiness, irritability and downward deviation of the baby's eyes (the sunsetting sign).
Toddlers whose sutures have not yet closed also show the signs of head enlargement. Older toddlers and children, once their sutures have closed, will show other symptoms of raised intracranial pressure (ICP) caused by their enlarged ventricles. Often these symptoms include headache, nausea, vomiting and sometimes blurred or double vision. The child might have problems with balance, delayed development in such areas as walking or talking, or poor coordination. As with infants, a child may be more irritable or tired than normal. The child may show a change in personality or be unable to concentrate or remember things, and their school performance may decline. Older children may have difficulty waking up and staying awake. While at times the symptoms are very noticeable, other times they can be very subtle and progress so slowly that only in retrospect are they appreciated.