Patellar instability with medial patellofemoral ligament tear


There are a number of "typical" features for patellar instability/dislocation in this case including a flattened trochlea, malalignment, and bone edema consistent with recent dislocation. The medial patellofemoral ligament and retinaculum are review areas in MRI knee, and when torn can continue to leave the patella unstable. Instability may be initially managed with physiotherapy.