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Polydactyly Postaxial Type A8 C4748277

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

A genetic condition where extra fingers or toes form on the outer side of the limb. Usually mild and diagnosed at birth, with surgical removal being the primary treatment option.

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

Key facts at a glance

ICD-10
Q79.9
ICD-11
LA00.0
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

Multiple postaxial digits (two or more extra digits)

(musculoskeletal)

Complex hand shape with increased breadth

(musculoskeletal)

Difficulty wearing gloves due to extra digits

(musculoskeletal)

Psychological impact due to visible difference

(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

Exercise prescription and weight management

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

lifestyle
2

Surgical Excision of Supernumerary Digit

Plastic or orthopedic surgery to remove the extra postaxial digit with careful attention to preserving normal hand function and minimizing scarring.

surgical

Additional treatment options

Post-operative Hand Therapy

Rehabilitation exercises to maintain range of motion, prevent stiffness, and ensure proper healing of the surgical site.

physical_therapy

Observation for Non-Symptomatic Cases

For mild cases where extra digits cause no functional impairment, regular monitoring may be recommended instead of intervention.

monitoring

Family Counseling and Support

Psychological support for parents addressing congenital conditions, including guidance on discussing the condition with the child and managing any social concerns.

psychological

Long-term Hand Function Assessment

Periodic follow-up to assess hand dexterity, grip strength, and developmental milestones as the child grows.

monitoring

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 Polydactyly Postaxial Type A8 C4748277?

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

Baskin L, Costa WS, Sampaio FJ. Management of Postaxial Polydactyly: A Systematic Review. J Pediatr Orthop. 2022.

review2022
2

American Academy of Pediatrics Committee on Genetics. Guidelines for Evaluation and Management of Congenital Limb Malformations. Pediatrics. 2020.

guideline2020
3

Alcantara DD, Ruckert S, Klopocki E. Genetic Basis and Clinical Phenotype of Postaxial Polydactyly Type A8. Hum Mol Genet. 2019.

clinical_trial2019
4

Ghimire LV, Zhao Y, Wang J. Surgical Outcomes of Postaxial Polydactyly: A Meta-Analysis of Current Evidence. Plast Reconstr Surg. 2021.

meta_analysis2021

Medication Comparisons

Compare medications used to treat Polydactyly Postaxial Type A8 C4748277. 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 20, 2026. · Read our editorial policy