Head circumference at 90 percentile for 2 mths old baby

Hi. Anyone has a baby who has big head circumference? My baby is 2 mths old and his head circumference is 41cm, 90 percentile. His height is 80 per and weight 50 per. Polyclinic doc refer him to KKH for further check up. As his head jump from 32cm from birth to 41cm within 2 mths.