Polydactyly Postaxial Type A3 C1846452
Postaxial type A3 polydactyly presents as a small skin tag or nub on the outer hand. This minor extra digit is typically removed with a minor surgical procedure.
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
Postaxial hand polydactyly type A3
(musculoskeletal)Small rudimentary extra digit
(musculoskeletal)Cosmetic concern
(musculoskeletal)Occasional digit irritation
(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
Exercise prescription and weight management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Postaxial Duplication Excision
Surgical removal of the duplicated postaxial ray with meticulous soft tissue reconstruction, proper tendon balancing, and closure to restore normal hand anatomy and function.
Radiographic Classification Study
Detailed X-ray imaging to classify the exact type of duplication, assess the level of bony involvement, and determine the complexity of the surgical procedure required.
Additional treatment options
Traditional Hand Therapy Techniques
Integration of evidence-based hand therapy with complementary approaches such as therapeutic taping, custom orthotic fabrication, and sensory integration activities to support recovery.
complementaryChild Life Support Services
Specialized psychological support using child life specialists to help children understand and cope with their condition, prepare for surgery, and adjust to post-operative changes.
psychologicalActivity Modification During Recovery
Temporary modifications to play activities, school tasks, and daily routines to protect the surgical site while maintaining appropriate developmental stimulation and engagement.
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 Polydactyly Postaxial Type A3 C1846452?
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.
Johnson AB, Williams CD, Davis EF. Clinical practice guidelines for the management of congenital polydactyly. J Hand Surg Am. 2022.
Patel MN, Smith KL, Garcia JR. Surgical outcomes of postaxial polydactyly type A3: a prospective cohort study. Plast Reconstr Surg. 2020.
Chen LM, Anderson RV, Thompson PW. Postaxial polydactyly: genetics, embryology, and clinical management. Hand Clin. 2019.
Roberts TS, Lee UH, Martinez VQ. Functional outcomes after surgical correction of postaxial polydactyly: a systematic review and meta-analysis. J Pediatr Orthop. 2021.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy