The surgeon makes an opening in the bone. The most common type of surgery for Chiari I malformations is posterior fossa decompression. It may not always be necessary for people with mild symptoms. Surgery is not required for asymptomatic Chiari I malformations. Specific Chiari malformations require surgery. This may be a helpful test, particularly when planning future pregnancies. This looks at a large part of your child’s genetic material. For example, they may recommend whole exome sequencing. Your child’s neurologist may recommend additional genetic testing for Chiari II and III malformations. In asymptomatic Chiari I malformations, repeat imaging is not usually needed.Ĭhiari II and III malformations are often initially seen on ultrasounds during pregnancy. In a Chiari I malformation with mild symptoms, the MRI may be repeated after a year or so. It can identify whether there is a syrinx in the spinal cord. Once the Chiari I malformation is diagnosed, a spine MRI may be done. They will also check to see if CSF flow is blocked. They will check how far down the cerebellar tonsils protrude. The doctor will look at the spinal canal. This enlarged, fluid-filled space in the spinal cord is then called a syrinx.Ĭhiari I malformations are usually diagnosed with an MRI. ![]() When CSF flow back to the brain is blocked, this space becomes enlarged.
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