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A member asked:
If my cerebellar tonsils extend 4 to 5 mm below the foramem magnum and my csf flow is normal, do i have chiari or benign cerebellar ectopia?
A doctor has provided 1 answer
Ectopia: Probably ectopia. Tonsils usually greater than 5mm below magnum for chiari. However would make sure your images were read by a neuroradiologist. Morphology/shape of the tonsils also important. Have seen borderline/mild cases missed . I suggest caution, there are other reasons why tonsils could be low such as CSF leak etc.
Answered 11/5/2015
3.2k views
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