What Does Low Lying Cerebellar Tonsils Mean?
What Does Low Lying Cerebellar Tonsils Mean? Normally, the cerebellar tonsils should lie no more than 3 mm below the foramen magnum. Extension below the foramen between of 3 and 5 mm is considered borderline. Chiari malformations larger than 5 mm but smaller than 10 mm are symptomatic in approximately 70% of patients. Is it