dilatation of ventricles

hi below is the report of my son.

i want to know what are may the  casue for such a result?or it can be normal?and what my be the treatment?what medication needed?


HISTORY **:Large head**

FINDINGS **:The ventricles are somewhat dilated and prominent, they are largerthan usually seen in an infant.
The lateral ventricles aresymmetrically enlarged, the third ventricle is moderately dilated,the fourth ventricle is normal in caliber.
The ventricles arenormal in position. There are no masses, there is no intracranialhemorrhage. The brain parenchyma itself is normal.

** IMPRESSION **:The intracranial ventricular system is prominent with somedilatation of the lateral ventricles and the third ventricle.
Thisis a nonspecific finding. There are no associated findings thatmight suggest significant pathology, no congenital anomalies areseen.