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A 45-year-old member asked:

What is pencilling of cerebellar tonsils in chiari malformation? what causes it?

1 doctor answer2 doctors weighed in
Dr. James Goodrich
Neurosurgery 39 years experience
Chiari malformation: A Chiari malformation is a situation where the cerebellar tonsils, two small structures at the base of the brain or forced through the hole at the base of the skull called the foramen magnum. The tonsils can developed a beak-like appearance or a "pencilling" due to the narrowed appearance on MR.

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A 32-year-old member asked:

What is pencilling of cerebellar tonsils in a chiari malformation?

1 doctor answer3 doctors weighed in
Dr. Nikolaos Zacharias
Maternal-Fetal Medicine 26 years experience
Herniation.: The middle part of the cerebellum herniates through the foramen magnum (at the top of the spinal canal) in chiari ii malformation, causing a particular configuration of the cerebellar tonsils.

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Last updated Nov 29, 2014

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