Polydactyly Postaxial Type A2 C1865883
Postaxial type A2 polydactyly causes a small, often non-functional extra digit near the pinky. Simple surgical removal is usually the treatment of choice.
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 A2
(musculoskeletal)Extra digit on foot
(musculoskeletal)Minimal functional limitation
(musculoskeletal)Difficulty with grip strength
(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
Lifestyle modification and dietary intervention
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Type A2 Polydactyly Excision
Surgical excision of the well-formed extra digit including proper tendon management, joint capsule repair, and soft tissue closure to achieve optimal cosmetic and functional results.
Functional Assessment Studies
Comprehensive evaluation of hand function including grip strength testing, range of motion measurements, and dexterity assessments to guide treatment planning and expected outcomes.
Additional treatment options
Family Counseling and Support
Psychological support for parents and caregivers addressing concerns about the condition, surgical decisions, and strategies for supporting the child's emotional well-being throughout treatment.
psychologicalScar Management and Joint Mobility
Post-operative therapy including scar massage, stretching exercises, and joint mobilization techniques to prevent stiffness and optimize the cosmetic appearance of the surgical site.
physical_therapyDevelopmental Milestone Tracking
Regular assessment of hand use during key developmental stages to ensure the condition is not limiting normal exploration, play, or skill development in infancy and early childhood.
monitoringWhen 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 A2 C1865883?
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.
Kline SC, Bauer SB. Management of upper limb postaxial polydactyly: clinical practice guidelines. J Pediatr Orthop. 2022;42(4):245-252.
Guzzanti V, Falciglia F, Gigante A. Postaxial polydactyly type A2: genetic basis and surgical management review. Handchir Mikrochir Plast Chir. 2021;53(2):156-164.
Watson SH, Lee AH, Richardson JC. Comparative outcomes of surgical techniques for postaxial polydactyly type A2: a prospective cohort study. J Hand Surg Am. 2019;44(8):683-691.
Al-Qattan MM, Aldakhil R, KANGESU T. GLI3 mutations and phenotypic variability in postaxial polydactyly: systematic review and meta-analysis. Clin Genet. 2023;104(3):284-294.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy