PIP Hyperextension DIP Hyperflexion

The patient is a 35-year-old female who got her finger caught in a metal staircase banister one day prior to presentation. Physical examination is significant for R 5th finger PIP hyperextension and DIP hyperflexion (swan neck deformity). Her PIP flexion limited to about 20°, while her contralateral PIP joint shows about 100 degrees of flexion. No sensory or motor deficits noted. View the x-rays taken (Figure 1 and 2) and consider what your diagnosis and …

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