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The patient is a 20- year- old female who presents with pain one day after experiencing a blow to the knee during a fall.

On exam, you reveal no significant findings beyond mild local tenderness. She is able to bear weight fully on both legs. View the image taken (Figure 1) and consider what your diagnosis and next steps would be.
Resolution of the case is described on the next page.

Clinical Challenge 2: January 2010

Nahum Kovalski, BSc, MDCM

Clinical Researcher at TEREM Emergency Services