"A review regarding the quality assessment of radiological measurements identified the following metrics as most useful for the assessment of trochlear dysplasia 11: the lateral trochlear inclination (LTI), the crossing sign, the trochlear bump, the TT-TG for planning treatment, the trochlear depth and the ventral trochlear prominence."
Expected headings
"Classification"
"Trochlear dysplasia can involve a shallow, flattened or convex trochlear groove +/- a hypoplastic (small) or convex lateral femoral condyle 15. This dysplastic deformity of the most superior aspect of the femoral trochlea, in particular, is a risk factor for patellar dislocation during the transition from full knee extension to early knee flexion. The degree of dysplasia for causing patellar instability is not known 15."
"There is a poor correlation between the classical and still commonly used Dejour classification system and the measurements derived from axial MR images. This should be taken into account when indicating trochlear dysplasia. The radiological report should, therefore, contain a qualitative description as well as the metric used for the diagnosis of trochlear dysplasia."