1 MCQs in Pediatrics for NEET PG
A newborn girl presents with stridor and apneic spells within hours of birth. Prenatal ultrasound had shown a lumbosacral myelomeningocele with lemon and banana signs. Sagittal MRI of the brain reveals a small posterior fossa with downward displacement of the cerebellar vermis and medulla oblongata through an enlarged foramen magnum, as marked **A** in the diagram. Which of the following best explains the mechanism by which this herniation (marked **A**) develops in Chiari Type II malformation?
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