Medial Patellar Dislocation

http://www.springerlink.com/content/r23348472032m820/fulltext.pdf?page=1

This link takes you to a recent case report from Skeletal Radiology. Back in 1991 I coauthored the case report first describing this entity and associated it with prior lateral release reconstructive surgery for patellar instability. The medial dislocation in this recent report occurred in a patient with no prior surgery. Trochlear dysplasia now appears to be the most important predisposing factor in this rare disorder. The current report nicely demonstrates the roles MR and US played in making the diagnosis.