This patient has a first web-space contracture associated with systemic sclerosis. The thumb MCP joint exhibits a hyperextension deformity, and the thumb IP joint exhibits a flexion deformity. The resultant contracture limits the patient's ability to bring the thumb out of the plane of the palm to grasp large objects.
MCP: metacarpophalangeal; IP: interphalangeal
Courtesy of Philip E Blazar, MD.
Graphic 122541 Version 2.0
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