Trochlear depth
>3 mm
Magnetic resonance imaging
a : length of lateral femoral condyle
b : length of medial femoral condyle
c : length of trochlea at the intercondylar sulcus level
Trochlear depth = ((a+b) / 2) - c
Pfirrmann CW, Zanetti M, Romero J et-al. Femoral trochlear dysplasia: MR findings. Radiology. 2000;216 (3): 858-64.
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