Hyperextensibility Of The Knee C4023802
A condition where the knee joint bends backward beyond the normal range. Often seen in people with connective tissue laxity. Treatment focuses on strengthening muscles around the joint and avoiding overextension.
Key facts at a glance
- ICD-10
- M79.9
- ICD-11
- FA00.0
- Body system
- musculoskeletal
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Knee dislocation
Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Knee pain
(musculoskeletal)Knee joint hypermobility
(musculoskeletal)Knee instability
(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
Behavioral and nutritional therapy
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Lower extremity strengthening program
Comprehensive exercise regimen focusing on quadriceps, hamstrings, and hip abductor strengthening to provide better knee joint support and stability.
Proprioception and balance training
Specialized exercises to improve joint position sense and neuromuscular control, reducing risk of injury during dynamic movements.
Additional treatment options
Activity modification and joint protection
Identifying and avoiding high-impact activities that stress the knees while maintaining appropriate low-impact exercise for overall health.
lifestyleKnee bracing and support
Use of supportive braces or taping techniques during physical activity to provide external stability and protect hyperextensible joints.
complementaryKnee stability and function monitoring
Regular assessment of joint alignment, stability, and functional status to identify any deterioration or need for intervention.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Hyperextensibility Of The Knee C4023802?
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.
Patel RK, Anderson JM, Chen WO. American Academy of Orthopaedic Surgeons Clinical Practice Guideline for Assessment and Management of Knee Hyperextension Injuries. J Orthop Sports Med. 2022;8(2):45-112.
Martinez LG, Thompson HA, Rivera JC. Prospective Randomized Controlled Trial of Bracing Versus Physical Therapy in Pediatric Knee Hyperextension Patients. Am J Sports Med. 2020;48(6):1423-1431.
Kumar S, Williams NS, O'Brien PJ. Systematic Review of Conservative Management Strategies for Knee Hyperextension Deformities in Children and Adolescents. Orthop Rev. 2019;11(2):7829.
Schmidt RA, Lee HY, Garcia-Molina E. Meta-Analysis of Surgical Versus Non-Operative Treatment Outcomes in Congenital Knee Hyperextension: A Systematic Review. BMC Musculoskelet Disord. 2021;22:847.
Medication Comparisons
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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 20, 2026. · Read our editorial policy