Presentation
Twisting of knee
Patient Data
Age: 25 years
Gender: Male
From the case:
Transient patellar dislocation
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Bone contusions with marrow edema are seen in the lateral femoral condyle and medial patellar facet.
A partial tear of the medial patellofemoral ligament is seen.
Associated shallow trochlear groove with a hypoplastic medial trochlear facet.
Note is made of a strain of proximal patellar tendon.
Case Discussion
Findings are consistent with transient patellar dislocation. A shallow trochlear groove with a hypoplastic medial trochlear facet (trochlear dysplasia, Dejour type c) predisposes to dislocation.
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