Chiari Malformation Treatment with Dr. Shah-Naz Khan, Neurosurgeon in Flint, MI
A Chiari malformation is a structural problem in which the lower part of the brain, the cerebellar tonsils, sits below the base of the skull and pushes into the spinal canal. This can crowd the brainstem and block the normal flow of spinal fluid. Treatment ranges from watchful monitoring for mild cases to posterior fossa decompression surgery when symptoms are significant.
What it is
The lower brain (cerebellar tonsils) extends below the skull into the spinal canal, crowding the brainstem.
Who it affects
Chiari I, the most common type, is often found in teens and adults, sometimes by chance on an MRI.
Common symptoms
A headache at the back of the head that flares with coughing or straining, plus neck pain and balance trouble.
When it matters
Symptoms that disrupt daily life, or a fluid cavity in the spinal cord (syrinx), often prompt treatment.
Main treatments
Monitoring for mild cases; posterior fossa decompression surgery when symptoms are significant.
What is a Chiari malformation?
A Chiari malformation is a condition in which brain tissue extends into the spinal canal. It happens when the space at the base of the skull is smaller or more crowded than usual, pushing the lower part of the cerebellum, the cerebellar tonsils, down through the opening where the spinal cord passes.
The most common form, Chiari I, often causes no problems and is sometimes discovered by accident on a scan done for another reason. When it does cause symptoms, it is usually because the crowding presses on the brainstem or blocks the smooth flow of cerebrospinal fluid between the brain and spine.
That blocked fluid flow can sometimes create a fluid-filled cavity within the spinal cord, called a syrinx, which is one reason a full picture of the brain and spine matters. Care for Chiari sits within Dr. Khan's neurosurgical practice. See complex neurology →
Chiari types, in brief
When should Chiari symptoms be checked?
A Chiari malformation is usually not an emergency, but certain neurological symptoms should be evaluated promptly, and disabling symptoms are worth a neurosurgeon's review.
Get prompt medical care if…
These can signal significant pressure on the brainstem or spinal cord and should be assessed without delay.
- New or worsening weakness, numbness, or clumsiness in the arms or hands
- Difficulty swallowing, a change in your voice, or choking on food or liquids
- Trouble with breathing, or severe balance and coordination problems
- A sudden, severe headache with vomiting that is new for you
See a neurosurgeon soon if…
Worth a specialist's evaluation rather than waiting and wondering.
- A headache at the back of the head that flares when you cough, sneeze, strain, or bend over
- Neck pain, dizziness, ringing in the ears, or trouble with balance
- Numbness or tingling in the hands, or a scan that already mentioned a Chiari malformation or syrinx
- You want a clear explanation of whether monitoring or surgery is right for you
What causes a Chiari malformation?
Most Chiari I malformations are present from birth because of how the skull and the space beneath it formed. A smaller number develop later from another cause.
Usual (congenital) causes
- A smaller or more crowded posterior fossa, the space at the base of the skull
- Structural differences present from birth in how the skull and brain formed
- A family tendency in some cases, though most occur without a clear family history
- Often no identifiable lifestyle cause; it is a structural condition
Less common (acquired) causes
- A build-up or leak of cerebrospinal fluid that shifts pressure in the skull
- Prior surgery, injury, or a mass affecting the base of the skull
- Conditions that change spinal-fluid pressure over time
- These are sorted out with imaging so treatment targets the real cause
How is a Chiari malformation diagnosed?
Chiari is diagnosed with imaging that measures how far the cerebellar tonsils extend and checks the flow of spinal fluid.
MRI of the brain
An MRI is the key test. It shows how far the cerebellar tonsils extend below the skull (generally more than about 5 mm is significant) and reveals crowding at the brainstem.
MRI of the spine
Imaging of the spine looks for a syrinx, a fluid cavity within the spinal cord that can form when fluid flow is blocked and that may change the treatment plan.
CINE (flow) MRI
A specialized MRI can show whether cerebrospinal fluid is moving normally around the base of the skull, which helps decide whether decompression would help.
How is a Chiari malformation treated?
Not every Chiari needs surgery. Treatment is matched to your symptoms, your imaging, and whether there is a syrinx.
Monitoring
If the Chiari causes few or no symptoms, it is often safely watched with periodic check-ins and imaging, since surgery may carry more risk than benefit in that situation.
Managing symptoms
Headaches and pain can sometimes be eased with medication and activity guidance while you and your surgeon decide whether surgery is warranted.
Posterior fossa decompression
The most common surgery removes a small piece of bone at the base of the skull, and sometimes the back of the top vertebra, to create more room, ease pressure, and restore fluid flow.
Duraplasty
When more space is needed, a patch is sewn into the covering of the brain, the dura, to enlarge the area further. Your surgeon decides if this step is right for you.
Deciding between monitoring and surgery
The decision rests on how much the Chiari is affecting your life, what the MRI shows about crowding and fluid flow, and whether there is a syrinx in the spinal cord. Many mild cases are watched safely, while significant symptoms or a syrinx often point toward decompression.
Every case is reviewed by Dr. Khan personally, and surgery is recommended only when the benefit clearly outweighs the risk. You will get a clear, honest explanation of the trade-offs and time for your questions. Second opinions are welcomed. Request a second opinion →
What shapes the plan
Recovery and what to expect
For people who are monitored rather than operated on, care is mostly regular check-ins and imaging to make sure symptoms and any syrinx stay stable. When surgery is needed, posterior fossa decompression usually involves a short hospital stay followed by several weeks of gradual recovery.
Many people notice their cough-related headaches ease after decompression, though results vary and some symptoms improve slowly over months. Your care team will explain your specific timeline, activity limits, and follow-up imaging. These are general patterns, not a promise about any one person's recovery.
Follow-up scans are an important part of Chiari care, so your neurosurgeon can confirm the decompression is working and that any syrinx is shrinking or stable.
General recovery patterns
Chiari care from a fellowship-trained neurosurgeon
Shah-Naz Khan, MD, FRCSC, FAANS is a board-certified, fellowship-trained neurosurgeon who founded the Institute of General and Endovascular Neurosurgery in Flint, Michigan in 2014. Care for structural conditions of the brain and skull base, including Chiari malformation, is part of her neurosurgical practice.
Her standard is simple: excellence, ethics, and integrity. Every case is personally evaluated by Dr. Khan, surgery is recommended only when it is truly in your best interest, and second opinions are genuinely welcomed, which matters for a condition where monitoring is often the right first choice. Explore complex neurology →
Why patients choose IGEN
- Board-certified, fellowship-trained neurosurgeon
- Careful, imaging-led decisions about when surgery is and is not needed
- Every case personally reviewed by Dr. Khan, not delegated
- Surgery advised only when the benefit clearly outweighs the risk
- Second opinions welcomed
Chiari malformation: frequently asked questions
What is a Chiari malformation?
What are the symptoms of a Chiari malformation?
Is a Chiari malformation serious?
Does a Chiari malformation always need surgery?
What is posterior fossa decompression?
Is a Chiari malformation hereditary?
Do I need a referral to see Dr. Khan about a Chiari malformation?
Worried about a Chiari malformation? Get a clear plan.
Whether a scan mentioned a Chiari malformation or you are living with cough-triggered headaches, Dr. Khan will review your imaging personally and explain whether monitoring or surgery is the right path for you.
- Request a consultation by phone or through the contact form.
- Share any brain or spine MRI scans you already have so nothing is repeated needlessly.
- Meet Dr. Khan for a personal review, a clear explanation, and honest next steps.