Chiari and Syringomylia

The Chiari malformation (CM) was first identified by Dr. Hans Chiari in 1891. It is an uncommon, complex, neurologic deformity which is present at birth.The brainstem normally sits in a funnel-like cavity just above the spinal cord. The problem occurs when the posterior fossa is not formed properly. Instead of the brainstem sitting in its proper space, the cerebellar tonsils are displaced downward into the funnel, thus causing pressure on this part of the brain and spinal cord.

 

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