1 MCQs in Orthopedics for NEET PG
A 42-year-old woman with a 2-year history of seropositive rheumatoid arthritis presents with progressive deformity of her right index finger. On examination, the structure marked **A** (PIP joint flexion deformity) is noted, with compensatory hyperextension at the DIP joint. She reports morning stiffness lasting 90 minutes and symmetric swelling of her MCPs and PIPs bilaterally. Which of the following best explains the mechanism of the deformity marked **A**?
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