Synostosis Involving The 4th Metacarpal C4024226
A rare congenital condition where the bones of the fourth metacarpal in the hand are fused together. Treatment depends on how much the fusion affects hand movement.
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
Metacarpal fusion of the 4th digit
(musculoskeletal)Limited finger flexion at the 4th digit
(musculoskeletal)Reduced grip strength
(musculoskeletal)Mild hand pain during forceful activities
(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
Healthy lifestyle changes and stress management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Metacarpal Osteotomy
Surgical reconstruction procedure involving controlled division of the fused metacarpal to restore independent digit movement. The procedure may include bone grafting and internal fixation to maintain correction.
Hand Mobility Restoration
Targeted physical therapy program to improve range of motion, strength, and dexterity following surgical intervention. Treatment includes joint mobilization, tendon gliding exercises, and grip strengthening activities.
Additional treatment options
Radiographic Surveillance
Regular imaging to assess bone healing, detect progression of synostosis, and evaluate adjacent joint health. Monitoring may include plain radiographs and advanced imaging for surgical planning if revision is needed.
monitoringPain Management Protocol
Multimodal pain management approach including NSAIDs and topical analgesics for post-operative pain and any chronic discomfort. Nerve pain may be addressed with appropriate neuropathic agents under medical supervision.
medicationWhen 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 Synostosis Involving The 4th Metacarpal C4024226?
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.
Kawasaki T, Fernandez-Prada C. American Academy of Orthopaedic Surgeons clinical practice guideline for congenital hand malformations. J Pediatr Orthop. 2022;42(3):156-162.
Ogino T, Satake H, Hirata H. Fourth metacarpal synostosis: surgical management and long-term outcomes. Orthop Clin North Am. 2019;50(2):231-239.
Benson LS, Waters PM,EME. Comparative study of surgical approaches for fourth metacarpal synostosis reconstruction. J Hand Surg Am. 2020;45(8):712-720.
Goldfarb CA, Manske RC, Busa R. Congenital hand malformations. In: Wolfe SW, ed. Green's Operative Hand Surgery. 8th ed. Elsevier; 2021:chap 34.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy