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10905 Surgery

All of the following are true about Arnold-Chiari malformation except:

AType I Chiari malformation is displacement of cerebellar tonsil into cervical canal
BType II Chiari malformation is associated with syringomyelia of cervical canal (Correct Answer)
CType II Chiari malformation is characterized by elongation of the 4th ventricle and kinking of the brainstem, with displacement of the inferior vermis, pons, and medulla into the cervical canal
DType I Chiari malformation is not associated with hydrocephalus