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Nontraumatic Extensor Pollicis Longus Snapping: Report of 2 Cases
Margaux Feltrin1, Antonio Dinh
1Hopital Privé Paul d'Egine, Champigny-sur-Marne, France.
JBJS Case Connector
|October 31, 2025
Summary
Nontraumatic extensor pollicis longus (EPL) snapping is rare. Tailored surgical approaches in two distinct cases successfully resolved snapping and restored thumb stability, highlighting individualized treatment importance.
Area of Science:
- Orthopedic Surgery
- Hand Surgery
- Musculoskeletal Disorders
Background:
- Nontraumatic dorsal thumb snapping involving the extensor pollicis longus (EPL) is an uncommon condition.
- EPL snapping can be associated with metacarpophalangeal instability and other underlying pathologies.
Purpose of the Study:
- To present two distinct cases of nontraumatic EPL snapping.
- To illustrate the importance of individualized surgical management based on specific pathology.
- To highlight the role of ultrasound in diagnosis and surgical planning.
Main Methods:
- Case report of two patients with nontraumatic EPL snapping.
- Surgical intervention tailored to the specific etiology in each case (radial artery thrombosis vs. extensor hood laxity).
- Diagnostic support using ultrasound.
Main Results:
- Successful resolution of thumb snapping in both patients post-surgery.
- Restoration of metacarpophalangeal joint stability at one-year follow-up.
- Ultrasound proved to be a valuable diagnostic tool.
Conclusions:
- Individualized surgical management is crucial for successful outcomes in EPL snapping.
- Ultrasound is an accessible and reproducible tool for diagnosing EPL snapping.
- Timely and tailored surgical strategies ensure functional recovery and long-term joint preservation, particularly in young, active individuals.
