VizD Radiograph Challenge Week of 7/30/2007

A 24-year-old woman presents to your ED complaining of knee pain. The patient as roller-skating, lost her balance, and fell directly onto her knee. After the fall, she was unable to ambulate and noted a swollen knee. The radiographs you ordered are shown below.


(click on image to enlarge)
Questions:
1. What is the diagnosis?
2. What is the most common type of this injury
3. What is the treatment of this injury?

Winner receives $5
To submit your answer please click on comments below.
For more information about the contest, click here.

VizD is a weekly contest of an interesting or pathognomonic image from emergency medicine. Its goal is to integrate learning into a fun and relaxed environment. All images are original and are posted with the consent of the patient. For more information please refer to the following link.