What is the primary cause of hydrocephalus in most children with spina bifida?

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Prepare for your Neural Tube Defects Myelomeningocele/Spina Bifida test with detailed flashcards and multiple-choice questions. Each query is supplemented with hints and explanations. Ace your exam with confidence!

Multiple Choice

What is the primary cause of hydrocephalus in most children with spina bifida?

Explanation:
In spina bifida, hydrocephalus is most often caused by Chiari II malformation, where downward displacement of the hindbrain through the foramen magnum and crowding near the cerebral aqueduct blocks the normal CSF flow. This obstruction prevents cerebrospinal fluid from circulating properly, leading to enlarged ventricles and hydrocephalus. The problem isn’t excessive CSF production or a failure of absorption; it’s the hindbrain herniation that physically disrupts the CSF pathways. Chiari II malformation is the common structural issue tied to myelomeningocele, which is why it’s the primary driver of hydrocephalus in these children.

In spina bifida, hydrocephalus is most often caused by Chiari II malformation, where downward displacement of the hindbrain through the foramen magnum and crowding near the cerebral aqueduct blocks the normal CSF flow. This obstruction prevents cerebrospinal fluid from circulating properly, leading to enlarged ventricles and hydrocephalus. The problem isn’t excessive CSF production or a failure of absorption; it’s the hindbrain herniation that physically disrupts the CSF pathways. Chiari II malformation is the common structural issue tied to myelomeningocele, which is why it’s the primary driver of hydrocephalus in these children.

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