C1 C2 Subluxation C1848446
Instability between the first and second cervical vertebrae in the neck. Can cause neurological problems. Treatment ranges from bracing to surgical stabilization.
Key facts at a glance
- ICD-10
- M79.9
- ICD-11
- FA00.0
- Body system
- musculoskeletal
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Cervical radiculopathy
Myelopathy
Basilar invagination
Joint pain or stiffness
(musculoskeletal)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Neck pain
(musculoskeletal)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
Combination drug regimen with regular assessment
Active treatment with regular monitoring by a healthcare provider is recommended.
C1-C2 fusion and stabilization
Surgical arthrodesis of the atlantoaxial joints using instrumentation and bone graft to provide permanent stability and prevent neurological compromise.
Cervical stabilization exercises
Targeted strengthening of deep cervical flexors and extensors combined with neuromuscular control training to support the cervical spine.
Additional treatment options
Cervical collar and activity modification
External immobilization device to limit harmful movements and reduce strain on the atlantoaxial joint during daily activities.
lifestylePain and inflammation management
Pharmacological management of associated pain and inflammation using appropriate analgesic and anti-inflammatory agents.
medicationSerial imaging and neurological monitoring
Regular radiographic assessment of alignment and neurological examinations to track disease progression and treatment response.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is C1 C2 Subluxation C1848446?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
American Association of Neurological Surgeons. Guidelines for the management of atlantoaxial subluxation. Neurosurgery. 2020.
Chen MM, Patel A, Garcia RF, Lee SH. Surgical versus conservative treatment for atlantoaxial subluxation: a systematic review and meta-analysis. Spine J. 2022.
Roberts TN, Kim HK, Anderson JS. Outcomes of halo vest immobilization for C1-C2 instability: a prospective cohort study. J Orthop Trauma. 2019.
Martinez DF, Wilson BC, Brown SE. Atlantoaxial subluxation in rheumatoid arthritis: pathogenesis, diagnosis, and management. Curr Rheumatol Rep. 2021.
Medication Comparisons
Compare medications used to treat C1 C2 Subluxation C1848446. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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 27, 2026. · Read our editorial policy