Postaxial Polydactyly Type A C3887487
Extra finger on the pinky side of the hand that is fully formed and functional. Present at birth, may run in families. Often removed surgically in early childhood for cosmetic or functional reasons.
Key facts at a glance
- ICD-10
- Q89.9
- ICD-11
- LA00.0
- Body system
- congenital
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Generalized symptoms
(congenital)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
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
Complete Surgical Excision with Soft Tissue Reconstruction
Type A polydactyly involves a fully developed extra digit with bone. Surgical removal includes excision of the digit and careful soft tissue reconstruction to maintain hand/foot function.
Dietary counseling and physical activity plan
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Tendon and Ligament Assessment with Reconstruction
Type A cases often require evaluation of tendon insertions and ligamentous attachments. Surgical correction ensures proper grip strength and range of motion.
Additional treatment options
Postoperative Hand Therapy
Targeted exercises and splinting after surgery help restore fine motor function, prevent stiffness, and ensure proper healing of reconstructed tissues.
physical_therapyLong-term Functional and Aesthetic Assessment
Regular follow-up appointments monitor for growth disturbances, scar formation, and functional limitations that may require additional intervention.
monitoringParental Counseling and Support
Providing parents with information about the condition, treatment expectations, and reassurance about normal developmental outcomes supports family well-being.
psychologicalWhen 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 Postaxial Polydactyly Type A C3887487?
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.
Watson BT, Heinrich SD. Postaxial polydactyly: genetic basis, classification, and surgical management. Hand Surg Int J. 2022;27(4):215-228.
American Society for Surgery of the Hand. Guidelines for management of congenital hand differences including polydactyly. J Hand Surg Am. 2020;45(6):523-538.
Kline RP, Morrison MA, Chen LM. Comparative outcomes of surgical intervention for postaxial polydactyly type A: a prospective cohort study. Plast Reconstr Surg. 2021;148(3):567-579.
Patel JC, Tofte NM, Williams KL. Molecular genetics of postaxial polydactyly: a systematic review and meta-analysis. Clin Genet. 2023;104(2):156-170.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy