Chiari decompression, also called posterior fossa decompression, is a procedure that removes a small portion of bone at the back of the skull.
This:
- Creates more space for the cerebellum
- Reduces crowding at the brainstem
- Improves the flow of CSF
In some cases, the covering of the brain (dura) is also expanded to further increase space.
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WHY IS THIS PROCEDURE PERFORMED?
Surgery is considered when Chiari malformation is causing symptoms or complications.
Common Reasons for Surgery
- Headaches triggered by coughing or straining
- Neck pain or neurologic symptoms
- Presence of a syrinx (fluid-filled cavity in the spinal cord)
- Progressive or worsening symptoms
👉 Not all Chiari malformations require surgery—careful patient selection is critical
WHO IS A CANDIDATE?
Patients may be candidates if:
- Symptoms clearly correlate with Chiari findings on MRI
- Symptoms are significant or progressive
- There is evidence of impaired CSF flow
- A syrinx is present
Surgery is not recommended for:
- Incidental Chiari malformations without symptoms
- Symptoms that are unlikely to be related to Chiari
HOW THE PROCEDURE IS PERFORMED
Step-by-Step Overview
- Anesthesia
- The procedure is performed under general anesthesia
- Positioning
- The patient is positioned to allow access to the back of the head and upper neck
- Bone Removal
- A small portion of bone at the base of the skull is removed
- Dural Opening (when needed)
- The dura is opened and expanded with a patch (duraplasty)
- Restoration of CSF Flow
- The goal is to create more space and improve CSF circulation
OUR APPROACH
Our focus on careful patient selection and tailored surgical technique.
- Surgery is only recommended when symptoms clearly match imaging findings
- We aim for adequate decompression while minimizing unnecessary intervention
- Duraplasty is used selectively based on anatomy and CSF flow
- The goal is durable symptom relief with low complication risk
👉 Thoughtful decision-making is just as important as surgical technique
WHAT TO EXPECT
Before Surgery
- MRI review and clinical evaluation
- Discussion of risks, benefits, and expected outcomes
- Preoperative planning
Day of Surgery
- Procedure typically takes several hours
- Performed under general anesthesia
Hospital Stay
- Usually 2–4 days
- Pain control and early mobilization
Recovery
- Gradual return to normal activity over several weeks
- Headaches may improve early, but some symptoms take longer
- Follow-up imaging may be performed
OUTCOMES & SUCCESS RATES
- Many patients experience significant improvement in headaches
- Neurologic symptoms often improve over time
- Syrinx (if present) may decrease or resolve
- Outcomes are best when patients are carefully selected
RISKS & COMPLICATIONS
As with any surgery, risks include:
- Infection
- CSF leak
- Bleeding
- Persistent or incomplete symptom relief
- Need for additional surgery (rare)
👉 These risks are minimized with careful technique and appropriate patient selection
FREQUENTLY ASKED QUESTIONS
Will this cure my Chiari malformation?
The goal is to relieve symptoms and restore CSF flow, not necessarily “cure” the anatomy.
How long is recovery?
Most patients recover over several weeks, with gradual improvement.
Will I need a fusion?
Fusion is rarely required and only in select cases.
What if I don’t have surgery?
Many patients can be safely monitored if symptoms are mild or unclear.
FOR REFERRING PHYSICIANS (Optional Expandable Section)
- Refer patients with:
- Symptomatic Chiari malformation
- Syringomyelia
- Progressive neurologic symptoms
- MRI brain and cervical spine recommended
- Consider referral for:
- Evaluation of symptom correlation
- Surgical candidacy assessment
RELATED CONDITIONS / PROCEDURES
- Chiari Malformation
- Syringomyelia
- CSF Flow Disorders
CALL TO ACTION
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