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Patellar Dislocation

Patellar dislocation is an acute injury where the patella (kneecap) fully dislocates or slides out of its groove on the femur. Patellar dislocation can occur with minor trauma in those with certain anatomical variations that predispose them to this condition. Patellar dislocation can also occur with direct trauma or a sudden change in direction. Patients will sometimes report hearing a pop and will often have rapid swelling and difficulty with any knee flexion.

Anatomy

The patella, or kneecap, is a thick triangular piece of bone that covers and protects the ...

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