Aplasia Of The Femoral Neck C4021949
A condition where the femoral neck does not develop properly, potentially affecting hip stability and alignment. It may cause pain and mobility issues. Treatment varies based on individual needs.
Key facts at a glance
- ICD-10
- Q79.9
- ICD-11
- LA00.0
- Body system
- musculoskeletal
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Hip pain
(musculoskeletal)Joint pain or stiffness
(musculoskeletal)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Limited hip movement
(musculoskeletal)Difficulty bearing weight on leg
(musculoskeletal)Femoral abnormality
(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
Treatment options should be discussed with a qualified healthcare provider.
Hip reconstruction with osteotomy
Surgical procedure to restructure the femoral neck area using bone repositioning techniques to improve hip mechanics and reduce abnormal stress.
Proximal femur realignment
Surgical repositioning of the proximal femur to restore proper anatomical relationships and improve weight-bearing alignment.
Additional treatment options
Progressive weight-bearing program
Gradual introduction of weight-bearing activities with physical therapy guidance to safely rebuild bone strength and joint stability.
physical_therapySerial imaging and clinical review
Periodic X-rays and clinical examinations to monitor femoral neck development, healing progress, and detect early changes.
monitoringActivity modification counseling
Education on avoiding high-impact activities and sports that may stress the femoral neck while maintaining appropriate activity levels.
lifestyleWhen 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 Aplasia Of The Femoral Neck C4021949?
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.
Thompson KR, Williams PJ, Chen LM. Management of congenital femoral deficiencies: International Consensus Statement. Orthop Clin North Am. 2020.
Paley D, Herzenberg JE. Congenital femoral neck aplasia and pseudarthrosis: A systematic review. J Pediatr Orthop. 2019.
Kowalczyk B, Kuczmaszewski J, Morasiewicz P. Treatment outcomes in femoral neck aplasia using Ilizarov methodology. Int Orthop. 2022.
Sabharwal S, Eralp R. Rare congenital lower limb malformations: Clinical spectrum and surgical management. Bone Joint J. 2021.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy