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About — Chiari Clinic

Our Approach

Most people who find this page have already spent considerable time in a medical system that was not sure what to do with them. What follows is an honest account of how we think about Chiari malformation, what a consultation here involves, and when surgery is — and is not — the answer.

One surgeon. No institution. No predetermined outcome.

Chiari Clinic is a specialized neurosurgical program of Cerbo Clinic, an independent neurosurgery practice serving the Peninsula and Bay Area. There is one surgeon. There is no institution behind the name, no committee, no marketing department deciding how to present neurosurgery to you. What you encounter here is the clinical thinking of a single board-certified neurosurgeon who has chosen to focus significantly on adult Chiari malformation — because it is a condition that, more than almost any other in neurosurgery, suffers from being managed without adequate expertise.

That focus is not a marketing claim. It is a consequence of a specific observation: the majority of adults with a Chiari diagnosis are either undertreated — managed with a "watch and wait" that has no real structure behind it — or referred to large institutional programs where wait times are long, access is difficult, and the relationship with the surgeon is thin. The independent, accessible, subspecialty-focused practice does not currently exist in this space in the Bay Area. This clinic exists because it should.

When surgery is — and is not — the answer

The most important thing this clinic believes about Chiari surgery is that it is indicated for a minority of people diagnosed with Chiari malformation — and that determining whether you are in that minority requires genuine clinical evaluation, not a reflexive response to a radiology report.

Treatment decisions should be driven by the clinical picture, not by the radiographic finding alone. A patient with 15mm of tonsillar descent and no symptoms is not a surgical candidate. A patient with 4mm of tonsillar descent, progressive hand weakness, and an expanding cervical syrinx almost certainly is. The millimeters on the report are the beginning of the conversation, not its conclusion.

This principle is drawn from the 2022 international consensus document on Chiari and syringomyelia authored by 32 specialists from 10 countries — the governing document behind the clinical recommendations on this site and in this practice.

What surgery can reliably accomplish
  • Resolution or substantial improvement of Valsalva-triggered occipital headache
  • Halting syrinx progression — and in many cases, reduction in syrinx size
  • Halting of neurological deterioration
  • Improvement of existing neurological deficits in a meaningful subset of patients
What surgery typically cannot accomplish
  • Reversal of neurological deficits that are already established and chronic
  • Elimination of co-occurring migraine or chronic daily headache driven by central sensitization rather than structural obstruction
  • Resolution of symptoms not actually caused by the Chiari finding
  • Relief of fatigue, diffuse pain, and cognitive symptoms whose mechanism is not structural

That last category matters more than most Chiari websites acknowledge. A significant proportion of patients who find this site carry symptoms that are real, disabling, and not being adequately addressed — but that will not be resolved by posterior fossa decompression, regardless of what the MRI shows. Telling a patient that surgery is unlikely to help their primary symptoms is not a failure of medicine. It is the practice of honest medicine. That conversation happens in this clinic. It happens early. And it is considered as important as the conversation about surgical technique.

A directed clinical assessment — not a confirmation of the radiology report

A consultation at Cerbo Clinic for Chiari malformation begins before the appointment and ends with a complete, honest account of where you stand — not a scripted summary of the condition, and not a recommendation shaped by anything other than your clinical picture.

  • 1

    Imaging review before you arrive

    Imaging is reviewed in detail before the appointment — not summarized from a report, but reviewed directly: the actual sequences, the morphology of the tonsils, the CSF spaces at the foramen magnum, the presence and characteristics of any syrinx, and the associated findings the radiology report may have mentioned in passing or missed entirely.

  • 2

    Directed clinical history

    The history is taken with attention to the specific symptoms that carry diagnostic weight in Chiari: the character, location, and trigger pattern of headache; the presence and distribution of sensory changes; hand strength and fine motor function; balance and coordination; sleep quality and respiratory symptoms; and autonomic symptoms including orthostatic intolerance. This is not a general screen. It is a directed assessment for a specific structural problem.

  • 3

    A Chiari-specific neurological examination

    The neurological examination covers what a Chiari assessment should cover: lower cranial nerve function, cerebellar signs, motor strength with attention to intrinsic hand muscles, sensory testing with separate evaluation of pinprick and temperature discrimination, fundoscopy for papilledema, and postural vital signs when indicated.

  • 4

    A complete, honest assessment — without pressure

    At the conclusion, a clinical assessment is offered: an honest account of where you are, whether the imaging and clinical findings are anatomically consistent, what additional evaluation may be warranted, and what the appropriate management approach is for your specific situation. For many patients, that will not be surgery. For some it will be a structured observation plan. For a subset it will be a recommendation for surgical planning — with a detailed explanation of what the surgery involves, what it can realistically accomplish, and what it cannot. It will always be a complete assessment delivered without pressure toward any predetermined outcome.

No institutional incentive to operate

Independent neurosurgical practice is not sustained by volume alone. A single-surgeon practice with a clinical focus on a condition that, for most patients, does not require surgery, is not a model that is motivated by maximizing the number of operations performed. It is motivated by being the consultation that was actually worth having.

This clinic has no institutional incentive to operate. There is no departmental surgical volume metric, no administrator counting procedures, no referral relationship that depends on maintaining a certain case load. The recommendation for or against surgery is made on the clinical merits of the individual case, explained in full, and offered without the pressure that institutional contexts sometimes create in both directions — toward surgery when it benefits the system, away from it when it does not fit a busy schedule.

Who this practice is — and is not — the right fit for

The right fit

Patients who want to understand their situation clearly before making any decision. Who can absorb honest complexity without needing it simplified into a binary. Who are prepared for the possibility that the answer is not surgery, and for the possibility that it is. And who want the surgeon sitting across from them to have thought carefully about which answer is true for them specifically — not for the average patient in a published series, but for them.

A better fit elsewhere

For the patient who has already decided and wants a surgeon to proceed, a major academic center with a high surgical volume may be a better match. We are glad to provide recommendations. The goal is for every patient to be in the right place — not necessarily here.

Board certification, scope of practice, and where subspecialty focus matters

Board certification in neurological surgery is awarded by the American Board of Neurological Surgery following successful completion of an accredited seven-year neurosurgery residency, a qualifying written examination, and an oral certifying examination with review of submitted surgical case records. It is the definitive credential verification for neurosurgical practice in the United States and can be confirmed at abns.org (opens in new tab).

Within neurosurgery, Chiari malformation management — specifically posterior fossa decompression with duraplasty, the standard surgical treatment for symptomatic adult CM-I — is core to neurosurgical training and within the scope of a board-certified neurosurgeon's practice. It requires meticulous microsurgical technique, careful patient selection, and thorough preoperative planning.

The surgical decision in Chiari cases, however, is where subspecialty focus matters most. The cases that present cleanly — progressive neurological deficit, syrinx with documented progression, Valsalva-triggered headache unresponsive to medical management — are straightforward in their indication. The majority of Chiari patients presenting for consultation do not present cleanly. They present with mixed symptom pictures, borderline imaging, comorbid conditions that complicate attribution, and clinical histories that require careful interpretation. Managing that complexity well is not a volume question. It is an experience and judgment question.

The focus on adult Chiari at this practice, the commitment to taking the full clinical picture seriously rather than defaulting to operative or non-operative management by habit, and the independent practice structure that removes institutional pressures from clinical decision-making — these are the elements that define the approach here and differentiate it from the standard academic center experience.

All clinical care takes place through Cerbo Clinic Neurosurgery

Chiari Clinic is a specialized program of Cerbo Clinic Neurosurgery. All clinical care, surgical planning, and operative care takes place through Cerbo Clinic. Patients seen through chiariclinic.com are patients of Cerbo Clinic — with access to the full scope of neurosurgical services that entails, not only Chiari-related care.

Cerbo Clinic accepts most major insurance plans and offers prompt appointments. Referrals from neurologists, primary care physicians, and imaging centers are welcome. Patients may also self-refer directly.

Learn more about the practice, the surgeon, and the care model on the Cerbo Clinic About page (opens in new tab), or go directly to schedule a consultation (opens in new tab).

Ready to schedule a consultation?

Cerbo Clinic accepts most major insurance plans. Referrals welcome. Self-referral welcome. Appointments available promptly.

Peninsula and Bay Area, California · cerboclinic.com (opens in new tab)

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This page describes the clinical approach of Cerbo Clinic Neurosurgery. Nothing on this site constitutes a physician-patient relationship or medical advice. Individual cases require individualized evaluation by a board-certified specialist.

Chiari Clinic · An Independent Chiari Reference · A program of Cerbo Clinic Neurosurgery · Peninsula and Bay Area