A member asked:

I had a brain mri stating cerebral tonsils terminating 5mm below foramen magnum. c spine mri says no chiari malformation. is it chiari or not?

A doctor has provided 1 answer
Dr. Michael Gabor answered

Specializes in Diagnostic Radiology

is a borderline measurement. There is some variability between investigators regarding the precise range of normal. In the abscence of any other findings, most authors would consider 5mm at the upper limit of normal. Some would term this "benign tonsillar ectopia", an incidental and asymptomatic finding. Some would consider 5mm indeterminate.As an isolated finding, it is not diagnostic of chiari

Answered Nov 28, 2017



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