Case: Lower limb radiograph #7645730
Lower limb Beginner
Read this radiograph systematically before revealing the answer. What is the main abnormality?
Image: Hellerhoff via Wikimedia Commons · CC BY-SA 3.0 · source · resized and converted to WebP
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Answer: Patellar dislocation
What to look for in patellar dislocation
- The patella lies lateral to the femoral trochlea instead of within it.
- After reduction, look for an osteochondral fragment or a medial patellar avulsion.
- A tangential (skyline) view shows patellar tracking best.
Description by the image author (may be in another language): Radiograph of lateral luxation of the patella. Left before treatment, right after reduction. Even after reduction, the patella is still displaced to the outside.
Educational case. The diagnosis comes from the image's documented source; the "what to look for" list describes the condition in general and is not a report of this individual image.
