An axial representation of a lateral patellar dislocation illustrates the dramatic transient lateral shift of the patella that occurs as the medial patella impacts upon the anterolateral aspect of the lateral femoral condyle.

An axial proton density-weighted image with fat suppression reveals complete disruption of the medial retinaculum at its patellar attachment (arrow) in another patient who recently suffered a lateral patellar dislocation.

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