Wednesday, May 7, 2008

Kneed a Diagnosis

A young male alpine skier who felt a pop in his knee with subsequent swelling and instability presents with this radiograph.

Challenge: Diagnosis?

Image shown under fair use.

1 comment:

Craig said...

Kneed a Diagnosis

This shows bone bruising (arrows) which is highly suggestive of an ACL tear where the anterior femoral condyle hits the posterior tibia. ACL tears are often seen in direct trauma and noncontact athletic injuries. Typical mechanisms include rotation and lateral bending (valgus stress) on the knee or sudden deceleration and direction change (cutting).

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