Question
The newborn is less than two months old and has developed bilateral temporal frontal subarachnoid cavity dilation, accompanied by bilateral lateral ventricle enlargement, with no other symptoms present. What could be the pathological cause of this condition? Why would a baby develop this disease? How should parents respond?
Answer
During infancy, symmetrical subarachnoid cavities (extracerebral spaces) in the frontal or frontal parietal lobes may be a physiological phenomenon within a certain range. In infants aged 2 to 12 months, extracerebral spaces (subarachnoid cavities) may appear significantly dilated, especially between 2 and 6 months. By the age of 2, most children’s extracerebral spaces and sulci have disappeared, leaving only narrow longitudinal fissures. Some scholars believe that the significant dilation of extracerebral spaces is due to a temporary imbalance in the production and absorption of cerebrospinal fluid during growth and development, as well as the slower growth rate of brain tissue compared to the skull in the first few months after birth. It is recommended to closely monitor the situation and handle it according to the advice of a professional physician.