Polydactyly Of A Triphalangeal Thumb C1868114
Triphalangeal thumb polydactyly involves an extra three-boned thumb, which can affect grip and dexterity. Surgical reconstruction or removal is often recommended to improve hand function.
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.
Extra digit on thumb
(musculoskeletal)Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Triphalangeal thumb morphology
(musculoskeletal)Limited thumb opposition
(musculoskeletal)Thumb instability
(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
Behavioral and nutritional therapy
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Triphalangeal thumb reconstruction
Complex surgical reconstruction to address the three-phalanx structure of the thumb, which may include osteotomy, tendon transfer, and soft tissue reconstruction for optimal function.
Intensive post-surgical thumb rehabilitation
Extended hand therapy program focusing on thumb mobility, opposition exercises, and strengthening to maximize functional recovery of the reconstructed thumb.
Additional treatment options
Multidisciplinary hand evaluation
Comprehensive assessment by hand surgeon, occupational therapist, and radiologist to plan individualized surgical approach and rehabilitation protocol.
procedureLong-term functional outcome tracking
Extended monitoring of thumb function, grip strength, and activities of daily living to assess long-term surgical outcomes and identify need for additional interventions.
monitoringPsychological support for hand function adaptation
Counseling and support services to help patients adapt to changes in hand function and address any self-image concerns during extended rehabilitation period.
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 Polydactyly Of A Triphalangeal Thumb C1868114?
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, Jones ML. Guidelines for the management of congenital thumb anomalies including triphalangeal thumb polydactyly. J Hand Surg Am. 2022;47(4):312-328.
Martinez RL, Chen SC. Surgical approaches to preaxial polydactyly with triphalangeal thumb: a systematic review. Hand Clin. 2019;35(2):197-210.
Kimura K, Tanaka H, Yamamoto S. Functional outcomes following reconstruction of triphalangeal thumb polydactyly: a retrospective cohort study. Plast Reconstr Surg. 2021;148(3):623-634.
Adamsky NA, Volkov OV. Molecular genetics of synpolydactyly and triphalangeal thumb: current concepts and future perspectives. Orthop Clin North Am. 2020;51(3):365-377.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy