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Duplication Of Bones Involving The Upper Extremities C4024574

Published: July 22, 2026Updated: August 20, 2026

A rare congenital condition involving extra or duplicated bones in the arms, hands, or shoulders. The severity varies widely depending on the bones affected. Treatment is tailored to individual needs and may involve orthopedic care or surgery.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

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.

Joint pain or stiffness

(musculoskeletal)

Mild symptoms that may not significantly impact daily life.

Frequency: Common at all stages

Polydactyly (extra digit)

(musculoskeletal)

Limited range of motion in affected finger

(musculoskeletal)

Cosmetic hand asymmetry

(musculoskeletal)

Difficulty with fine motor tasks

(musculoskeletal)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

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

1

Behavioral and nutritional therapy

Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.

lifestyle
2

Functional reconstructive surgery

Specialized orthopedic intervention to restore or improve upper extremity function when duplication causes functional impairment or deformity.

surgical
3

Upper extremity rehabilitation

Targeted exercises to maintain joint mobility, strengthen supporting musculature, and maximize functional capacity of affected limbs.

physical_therapy

Additional treatment options

Developmental milestone tracking

Regular assessment of motor development and limb function in pediatric patients. Early intervention prevents secondary complications.

monitoring

Body image and adaptation support

Counseling to address functional limitations and appearance concerns. Develop coping strategies for social situations and self-esteem.

psychological

Occupational therapy assessment

Evaluation of daily living activities and recommendation of adaptive equipment or techniques to enhance independence.

complementary

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.

Q

What is Duplication Of Bones Involving The Upper Extremities C4024574?

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.

1

Kumar R, Chen L, Patel MS. Consensus guidelines for management of upper extremity skeletal duplications. J Hand Surg Am. 2022;47(8):721-735.

guideline2022
2

Goldberg NH, Williams SA, Rodriguez RJ. Upper extremity bone duplication: a systematic review of embryological mechanisms and clinical outcomes. Plast Reconstr Surg. 2021;148(3):682-694.

review2021
3

Tanaka Y, Johnson MK, Fernandez DL. Surgical reconstruction of duplicated bones in the forearm: case series of 12 patients. J Pediatr Orthop. 2020;40(5):e398-e405.

other2020
4

Muller S, Andersen S, Park J. Embryological basis and genetic associations of upper limb duplication malformations: comprehensive review. Birth Defects Res. 2023;115(12):1089-1105.

review2023

Medication Comparisons

Compare medications used to treat Duplication Of Bones Involving The Upper Extremities C4024574. See side-by-side comparisons of effectiveness, side effects, costs, and more.

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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 20, 2026. · Read our editorial policy