Journal of Rheumatic Diseases

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Fig. 6. (A) This patient presented with swan neck deformity of the thumb. In this type of deformity, the metacarpal bone is progressively adducted and flexed, which results in inconvenience in opening of the first webspace. (B) The radiograph shows dorsoradial subluxation of the trapeziometacarpal (TMC) joint indicative of severe synovitis, and resultant metacarpal adduction and compensatory hyperextension of the metacarpophalangeal (MCP) joint (zigzag deformity). Resection of the trapezium (dotted circle) and volar capsulodesis of the MCP joint (curved arrow) was performed. (C) Deformities of the TMC and MCP joints were corrected. Improved thumb abduction and pinching was observed along with cosmetic improvement.
J Rheum Dis 2021;28:192~201
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