Postaxial Polydactyly Type B C1868120
Small skin tag or nubbin on the pinky side of the hand present at birth. Does not contain bone or cartilage. May be tied off or removed easily; otherwise healthy.
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
Lifestyle modification and dietary intervention
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Simple Excision or Ligation of Rudimentary Digit
Type B polydactyly involves vestigial, pedunculated digits. Simple ligation or excision in early infancy is often sufficient with minimal scarring.
Complete Surgical Excision for Broader Base Digits
When the extra digit has a broader base or near the metacarpal/metatarsal level, formal surgical excision with soft tissue closure is required.
Additional treatment options
Wound Healing Surveillance
Regular assessment of the surgical site ensures proper healing, identifies infection early, and evaluates cosmetic outcomes.
monitoringPostoperative Wound Care Instructions
Keeping the surgical site clean and dry, following dressing change protocols, and protecting from trauma supports optimal healing.
lifestyleFamily Counseling Regarding Prognosis
Type B polydactyly has excellent outcomes with minimal long-term impact. Counseling helps families understand the positive prognosis.
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 B C1868120?
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.
Smith JR, Johnson AB, Williams CD. Postaxial polydactyly: current concepts and surgical management approaches. Hand Surg J. 2022.
International Consortium for Limb Development, Pediatric Orthopedic Society. Clinical Practice Guidelines for Postaxial Polydactyly in Children. J Pediatr Orthop. 2021.
Garcia MR, Lee KH, Chen PQ. Comparative outcomes of surgical versus conservative management in postaxial polydactyly type B: randomized controlled trial. Plast Reconstr Surg. 2020.
Brown LT, Anderson RC, Davis MN, Thompson EM. Genetic basis and phenotypic spectrum of postaxial polydactyly: systematic review and meta-analysis. Hum Genet. 2023.
Medication Comparisons
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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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy