1 MCQs in Orthopedics for NEET PG
A 44-year-old man with a 12-year history of plaque psoriasis presents with asymmetric oligoarthritis and nail pitting. Posteroanterior hand radiograph shows the deformity marked **A** in the distal interphalangeal joints of both index and middle fingers, characterized by erosion of the proximal bone end tapered to a "pencil" and cup-like widening of the opposing distal bone end. Rheumatoid factor and anti-CCP are negative. Which of the following radiographic findings would BEST differentiate this condition from rheumatoid arthritis?
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