What Is Meant By Hydrocephalus Fluid In Brain In New Born?

Hi DoctorGood Morning<My son is 4 months old and PGI Chandigarh doctor told that he has hydrocephalus fluid in brain, but they did not do MRI, they did CT scan. They asked to come after 2 months and they will do MRI in 8th month. Please guide what should we do or we should stick to PGI Chandigarh treatment.