Hello Doctor, My baby is 13 months old, born premature (32wks) weighing only 1.5 kg. At the time of birth the HC of the child was 30cm whereas presently it's 50cm. He has undergone neurosonogram many times. As per last report, there is some space in Subarachnoid space. He is reaching his milestones on time. HC of both the parents is more than 56 cm. kindly guide us in this regard. what can be done now?? should we be worried for him ?