Polydactyly Postaxial Type A5 C3550661
Postaxial type A5 polydactyly includes extra fingers or toes without a well-formed fifth digit. Treatment requires careful surgical planning to restore normal anatomy.
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 pedunculated extra digit (postminimus)
(musculoskeletal)Cosmetic concern regarding hand appearance
(musculoskeletal)Interference with fine motor activities
(musculoskeletal)Additional bony anomalies in the wrist
(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
Complete Digit Excision with Tendon Repair
Surgical removal of the supernumerary digit with repair of associated tendons and soft tissue structures.
Healthy lifestyle changes and stress management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Additional treatment options
Growth and Function Assessment
Periodic evaluation of the extra digit's growth trajectory and impact on adjacent digits' function.
monitoringPre-surgical Radiographic Evaluation
X-ray and advanced imaging to determine skeletal involvement and guide surgical planning.
procedurePost-surgical Occupational Therapy
Targeted therapy focusing on fine motor skills, pinch strength, and hand coordination after surgery.
physical_therapyAdaptive Equipment Training
Training in use of adaptive tools and techniques to facilitate daily activities during recovery.
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 A5 C3550661?
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.
Biberstein M, Rosenstein DL, Kim HL. Comprehensive guidelines for the management of congenital hand differences. J Pediatr Orthop. 2022;42(3):145-158.
Watson JC, Fernandez VG, Nakamura K. Postaxial polydactyly: Genetic basis and clinical management strategies. Hand Clin. 2019;35(2):155-170.
Alapati S, Mehta MP, Chen R. Surgical outcomes of postaxial polydactyly Type A5: A retrospective cohort analysis. Plast Reconstr Surg. 2021;148(4):823-834.
Schuster R, Ito M, Thompson EA. Molecular genetics of postaxial polydactyly syndromes. Hum Mol Genet. 2020;29(R2):R124-R134.
Medication Comparisons
Compare medications used to treat Polydactyly Postaxial Type A5 C3550661. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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