Superior patellar dislocation

Lateral radiograph of the left knee showing superior dislocation of the patella held by interlocking osteophytes in a 61-year-old man who received a direct blow to the inferior patella during knee flexion.

Reproduced with permission from: Garner JP, Pike JM, George CD. Intra-articular dislocation of the patella: Two cases and literature review. J Trauma 1999; 47:780. Copyright © 1999 Wolters Kluwer Health, Lippincott Williams & Wilkins. Unauthorized reproduction of this material is prohibited.

Graphic 89064 Version 9.0

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Superior patellar dislocation