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biological

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Arnold–Chiari malformation

Arnold–Chiari malformation Arnold–Chiari malformation is a group of congenital structural abnormalities affecting the brainstem, cerebellum, upper spinal cord, and nearby bones.

Arnold–Chiari malformation is a group of congenital structural abnormalities affecting the brainstem, cerebellum, upper spinal cord, and nearby bones. Different types vary in severity and may involve downward displacement or herniation of brain tissue, and can be associated with symptoms such as headache, dizziness, swallowing problems, abnormal eye movements, breathing problems, and poor coordination.