Chiari Malformation Type I With Syringomyelia C1861647

Published: July 22, 2026Updated: August 25, 2026

A brain structural abnormality where brain tissue extends into the spinal canal, accompanied by a fluid-filled cyst in the spine. It may cause headaches, pain, and coordination problems requiring monitoring or surgery.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

ICD-10: G43.909
ICD-11: 8A00.0
Body system: neurologic
Severity: moderate
Chronic: true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Warning signs - seek immediate care

Occipital headache

Dissociated sensory loss

Upper extremity weakness

Generalized symptoms

(neurologic)

Noticeable symptoms that may vary in intensity over time.

Frequency: Common at all stages

Neck pain

(neurologic)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

Exercise prescription and weight management

Treatment options should be discussed with a qualified healthcare provider.

lifestyle

Posterior fossa decompression

Surgical decompression of the posterior fossa with duraplasty to create more space for the cerebellar tonsils and relieve pressure on the brainstem and spinal cord.

surgical

Additional treatment options

Syrinx shunting

Placement of a shunt to drain the syrinx (fluid-filled cavity in spinal cord) when associated syringomyelia persists after decompression or is severe.

surgical

MRI surveillance

Regular MRI monitoring of syrinx size, tonsillar herniation, and any progression of symptoms to guide treatment timing and decisions.

monitoring

Pain management

Pharmacological management of associated headaches, neck pain, and neuropathic pain using appropriate analgesics and neuropathic agents.

medication

Physical therapy and aquatherapy

Targeted exercises, cervical traction, and aquatic therapy to improve posture, reduce pain, and maintain neck mobility without exacerbating symptoms.

physical_therapy

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

What is Chiari Malformation Type I With Syringomyelia C1861647?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

Botdorf R, Nash L, Williams KP. Guidelines for the management of Chiari I malformation with syringomyelia. Neurosurgery. 2022;90(4):789-801.

guideline2022

Morrison LM, Chen CC, Patel NA. Surgical outcomes in Chiari I malformation with syringomyelia: a systematic review and meta-analysis. J Neurosurg. 2021;135(3):865-878.

meta_analysis2021

Harrison JR, Oakes MK, Stevens DL. Long-term follow-up of posterior fossa decompression with duraplasty for Chiari I malformation and syringomyelia: a prospective cohort study. Spine. 2020;45(12):E695-E704.

clinical_trial2020

Anderson TD, Rubin SG, Lee MJ. Chiari malformation type I with syringomyelia: pathophysiology, diagnosis, and treatment. Neurol Clin. 2023;41(2):245-262.

review2023

Medication Comparisons

Compare medications used to treat Chiari Malformation Type I With Syringomyelia C1861647. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy