(n ¼ 41) Cerebral tumour Hereditary Hydrocephalus Porencephalic cyst Benign intracranial hypertension Optic nerve glioma Infantile Krabbe's disease Cerebral infarct Intraventricular haemorrhage Leigh syndrome Meningitis Neurofibromatosis-1 ODI syndrome Optic chiasm glioma Perinatal ischaemia Trauma Tuberous ...