A 32-year-old woman is seen with pain and deformity in her left hand's fourth finger. She claims that she jammed her finger while playing basketball two days prior. She has a distal interphalangeal joint (DIP) flexion deformity and is unable to extend the joint, according to a physical examination. Radiographs of the left hand's lateral and anterior surfaces are taken (Figures 1 and 2).
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