A 3-year-old boy with spina bifida develops hydrocephalus.What is the likely cause of this?

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Hydrocephalus in spina bifida is usually caused by a blockage of the median or lateral apertures, which results in a buildup of cerebrospinal fluid (CSF). CSF is produced by the choroid plexus and flows through the ventricles of the brain before exiting through these apertures into the subarachnoid space. In spina bifida, the abnormal spinal cord can cause a blockage of these apertures, leading to hydrocephalus.

A 3-Year-Old Boy with Spina Bifida Develops Hydrocephalus