Slightly enlarged lateral ventricles in children may be related to trauma, meningitis, physiological factors and other reasons, which are analyzed as follows: 1. Trauma: If children suffer from serious trauma to the brain, it may lead to cerebrospinal fluid circulation disorder and slightly enlarged lateral ventricles, usually children have a history of trauma. 2. Meningitis: Meningitis can lead to subarachnoid hemorrhage, resulting in meningeal adhesions leading to obstructive hydrocephalus, and finally enlarged ventricles. Children may also suffer from vomiting, fever and convulsions. 3. Physiologic factors: Children with slightly enlarged lateral ventricles, without any other symptoms or medical history, may be caused by individual differences and may choose to observe and follow up. There may be other reasons for the slightly enlarged lateral ventricles in children. It is recommended to go to the hospital in time for a complete examination to clarify the cause of the disease and then give targeted treatment or therapy.