Percutaneous staged lateral band tenotomy can restore the balance between finger flexion and extension in the management of swan neck deformity due to intrinsic muscle retraction. Using WALANT confirmed the effectiveness of this technique because it provides an instantaneous intraoperative assessment of the deformity's correction.
Keywords: Déformation en col de cygne; Echographie; Intrinsic muscle; Muscle intrinsèque; Percutaneous treatment; Sonography; Swan neck deformity; Traitement percutané; WALANT.
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