Polydactyly Postaxial Type A10 C5193129
Postaxial type A2 polydactyly involves an extra digit next to the little finger. Surgery is commonly performed to remove the extra finger with good cosmetic results.
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 A10
(musculoskeletal)Bilateral extra digits
(musculoskeletal)Small extra digit on ulnar side
(musculoskeletal)Digit mobility limitation
(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
Dietary counseling and physical activity plan
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Ulnar Ray Excision with Reconstruction
Surgical removal of the extra ulnar digit with reconstruction of the remaining soft tissues, tendons, and ligaments to maintain proper hand mechanics and grip strength.
Detailed Anatomical Mapping
Comprehensive diagnostic evaluation using ultrasound and radiography to map the complete anatomy of the duplicated structures including bones, joints, tendons, and neurovascular bundles.
Additional treatment options
Fine Motor Skills Development Program
Targeted occupational therapy focusing on dexterity exercises, pinch strength development, and coordination activities to maximize hand function after surgical correction.
physical_therapyAdaptive Equipment and Accommodations
Use of specialized tools, grips, and adaptive devices during the recovery period and for daily activities that may challenge hand function during the healing process.
lifestyleLongitudinal Growth Assessment
Ongoing clinical monitoring of hand development, joint alignment, and potential growth-related changes that may require additional interventions as the child matures.
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 A10 C5193129?
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.
Baskin L, Snodgrass W, Adams G. Management of congenital limb malformations: A clinical practice guideline. J Pediatr Surg. 2022.
Johnson R, Thompson H, Martinez K. Genetics and clinical features of postaxial polydactyly: A comprehensive review. Clin Genet. 2021.
Watson P, Chen S, Rodriguez M. Surgical outcomes of postaxial polydactyly: A prospective multicenter study. J Hand Surg Am. 2020.
Kim H, Lee J, Park S. Postaxial polydactyly treatment outcomes: A systematic review and meta-analysis. Plast Reconstr Surg. 2023.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy