Downward dislocation of the patella

Recurrent dislocation of the patella.

Recurrent Dislocation of the Patella

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Permanent Dislocation of the Patella

Irreducible lateral dislocation of patella.

To cite: Yerimah G, Eisenstein N, Turner R. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2013009832 DESCRIPTION A fit and well 21-year-old man received a blow to the medial side of his knee while dancing in a pub. He became immediately non-weight-bearing and attended the emergency department. On examination, his knee was held in partial flexion and there was a ...

Patella Dislocation with Vertical Axis Rotation: The “Dorsal Fin” Patella

A 44-year-old woman presented following minor trauma to her right knee. While dancing she externally rotated around a planted foot and felt sudden pain in her right knee. She presented with her knee locked in extension with a "dorsal fin" appearance of the soft tissues tented over the patella. This was diagnosed as a rare case of an intraarticular patella dislocation, which was rotated 90 degre...