Case
A 54-year-old woman with history of active multiple sclerosis (MS) presented to the ED with left wrist pain after sustaining a mechanical fall 9 days earlier. On physical examination, the patient had minimal left wrist swelling with circumferential tenderness to palpation at both the distal radius and distal ulna, as well as snuff-box tenderness. Posterioranterior and lateral radiographs of the wrist were obtained (Figures 1 and 2).
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What is the diagnosis?