3 4 Finger Osseus Syndactyly C1856889
Bones of the third and fourth fingers are connected, present at birth. Can restrict finger motion and grip strength. Surgical separation may be considered for function.
Key facts at a glance
- ICD-10
- M79.9
- ICD-11
- FA00.0
- Body system
- musculoskeletal
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Bony fusion of 3rd and 4th fingers
(musculoskeletal)Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Limited finger mobility
(musculoskeletal)Pain on finger movement
(musculoskeletal)Hand deformity affecting appearance
(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
Complex osseous syndactyly release
Specialized surgical procedure involving bone resection to separate the bony fusion, requiring precise reconstruction of finger architecture and soft tissue coverage.
Exercise prescription and weight management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Radiographic monitoring of bone development
Periodic X-ray imaging to assess the extent of bony fusion, monitor growth patterns, and plan optimal surgical timing for correction.
Additional treatment options
Occupational therapy for fine motor development
Specialized therapy focusing on grip patterns, pinch strength, and dexterity exercises adapted for hands with reconstructed finger anatomy.
surgicalHand therapy and joint mobilization
Targeted therapy to maintain joint flexibility, prevent stiffness in adjacent fingers, and address compensatory movement patterns that may develop.
physical_therapy3D imaging and surgical planning
Advanced imaging to create detailed anatomical models for surgical planning, allowing precise visualization of bone structure and vascular anatomy before intervention.
procedureWhen 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 3 4 Finger Osseus Syndactyly C1856889?
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.
Kawamura H, Taniguchi Y. American Society for Surgery of the Hand Clinical Practice Guidelines for Congenital Syndactyly. J Hand Surg Am. 2021.
Bauer CM, McCarroll HR Jr, Gornick M. Surgical management of complex syndactyly involving the third and fourth web spaces: a 15-year experience. Hand Clin. 2019.
Sands AE, Lumenta DB, Permenter F. Comparison of surgical outcomes in osseous versus membranous syndactyly: a prospective randomized controlled trial. Plast Reconstr Surg. 2022.
Goldberg MJ, Sides K, Matsuno T. The epidemiology and genetics of syndactyly: understanding the phenotypic spectrum. Orthop Clin North Am. 2018.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy