The information on this website is not intended for diagnosis or treatment. Please consult your physician for health concerns.

+90 850 321 50 00

Chiari Malformation

Group of structural anomalies of the cerebellum and brainstem in which cerebellar tonsils descend below the foramen magnum, with type I being most common in adults and ranging from asymptomatic to disabling cough headache and syringomyelia.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Nöroloji department. Book Appointment →

What is Chiari Malformation?

Chiari malformation describes downward displacement of the cerebellar tonsils through the foramen magnum, with four traditional types — type I (tonsillar herniation > 5 mm), type II (with myelomeningocele), type III (encephalocele), and type IV (cerebellar hypoplasia).

Type I is most common in adults and may be associated with syringomyelia in 30 to 65 percent of cases; type II almost always coexists with spina bifida.

MRI of the brain and full spine confirms tonsillar position and identifies syrinx, and dynamic MRI evaluates CSF flow at the craniocervical junction.

Symptoms

Cough-, sneeze-, or Valsalva-induced occipital headache
Neck pain, dizziness, and tinnitus
Cerebellar signs — ataxia, dysmetria, gait instability
Lower cranial nerve symptoms — dysphagia, dysarthria, sleep apnea
Sensory loss in cape distribution and weakness from associated syringomyelia

Risk Factors

Family history of Chiari malformation
Connective tissue disorders such as Ehlers-Danlos syndrome
Hydrocephalus or pseudotumor cerebri
Tethered spinal cord and other neural tube defects
Female sex with mild but symptomatic descent

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Recurrent occipital headache triggered by cough or strain
  • New gait instability, balance problems, or limb weakness
  • Sleep apnea, dysphagia, or hoarseness with cerebellar findings
  • MRI evidence of syringomyelia or progressive symptoms

Treatment Methods

01
Observation with serial MRI and symptom monitoring in incidentally found, asymptomatic Chiari I
02
Symptomatic medical management — analgesia, sleep apnea support, vestibular therapy
03
Posterior fossa decompression with suboccipital craniectomy and C1 laminectomy in symptomatic patients with progressive symptoms or syringomyelia
04
Duraplasty and tonsillar reduction tailored intraoperatively to optimize CSF flow
05
Postoperative MRI follow-up to assess decompression, syrinx response, and recurrence risk

Which Department to Visit?

You can visit our Nöroloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Nöroloji Department

Let us help you

You can make an appointment with our specialists or contact us for your concerns.

Book AppointmentContact Us

Related Health Topics

Other articles from the same department you may want to explore.

Headache and Migraine

Nöroloji

What you need to know about headache types, migraine attacks, and triggering factors.

Low Back Pain

Nöroloji

Learn about the most common causes of low back pain, risk factors, and appropriate treatment approaches.

Neck Pain and Cervical Disc Herniation

Nöroloji

Learn about the symptoms and treatment options for cervical disc herniation and problems in the neck region.

Epilepsy

Nöroloji

Accurate information about epilepsy, types of seizures, and recommendations for patients and families.

Parkinson Disease

Nöroloji

Parkinson disease is caused by progressive degeneration of dopaminergic neurons and alpha-synuclein accumulation; well-timed therapy substantially improves function and quality of life.

Alzheimer's Disease and Dementia

Nöroloji

Information about early signs, diagnosis, and the care process for Alzheimer's and other types of dementia.

Multiple Sclerosis (MS)

Nöroloji

What is multiple sclerosis, who is at risk, and which treatments are applied?

Stroke

Nöroloji

What is stroke, what are the FAST signs, and why is emergency intervention critical?

Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.