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Patient 3: 19-year-old man with acute knee pain and swelling and a 2-year history of recurrent similar symptoms

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  • Competing interests None.

  • I-Test cases are designed as clinical teaching vignettes—they are not designed to be case reports. To protect anonymity of patients and clinicians involved, the authors of the I-Test have altered certain descriptive elements from the original case. Thus, the I-Test does not necessarily represent a specific clinical encounter.

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