IL18 and intracranial hemorrhage: Irrespective of the underlying cause, IL-18 concentrations were significantly higher in HPHC neonates than in controls, median and range: SBA: 80 (23–232) pg/ml; aqueduct stenosis: 66 (55–226) pg/ml; fetal intracranial haemorrhage: 223 (103–406) pg/ml; controls: 12.5 (12.5–158) pg/ml.