Thursday, September 4, 2014

Droop

This young healthy football player sustained a "knee injury." He is supine, hip flexed to 45 degrees, knee flexed to 90 degrees, and foot in neutral position.

Challenge: Where is the lesion?

Image shown under Fair Use.

6 comments:

Anonymous said...

Anterior cruciate ligament...

Raphaƫl said...

sorry meant posterior cruciate ligament!

Ram said...

posterior knee dislocation?

Anonymous said...

Knee effusion. ACL injury

RaH said...

this shows a Drawer test for the posterior cruciate ligament.

Craig Chen said...

wow! this one got lots of responses - nice job everyone
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Droop

This is a posterior sag sign. Normally, the medial tibial plateau is at least 1cm anterior to the femoral condyle. When there is a posterior cruciate ligament injury, this is lost.

Source: UpToDate.