PMC3263588_01
Clinical image of the bilateral dislocated patellae in standing position.
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fig1
The patellae were lying laterally to the lateral femoral condyle with the knee in the position of full extension (Figure 1) and they displaced more laterally during the flexion (Figure 2).
Clinical image of the dislocated patella of the asymptomatic left knee at 90 degrees of flection.
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fig2
The patellae were lying laterally to the lateral femoral condyle with the knee in the position of full extension (Figure 1) and they displaced more laterally during the flexion (Figure 2).
Roentgenograms of bilateral knees in AP, showing laterally displaced patellae with initial degenerative tibiofemoral arthritis.
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fig3
Roentgenograms of bilateral knees revealed small, laterally displaced patellae with slight degenerative changes in the tibiofemoral joints with subluxated tibia (Figure 3).
Lateral roentgenograms of the knees at about 30 degrees of flexion, showing dislocated patellae, marked lateral rotation deformities of the tibiae, and condylar deformity.
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fig4
Lateral roentgenograms showed marked lateral rotation deformities of the tibiae (Figure 4).
Skyline view roentgenograms, showing an increased deep of the trochlear groove and laterally dislocated patellae.
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fig5
A skyline view showed an increased deep of the trochlear groove, with laterally dislocated patellae forming a sort of new joint with the lateral aspect of the condyle (Figure 5).
Significative MRI image of the knees (extended), showing the dislocation of the patellae, the severe hypoplasia of the medial side of the femoral quadriceps, and the pseudojoint of the lateral condyles.
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fig6
On both sides, the MRI confirmed the dislocation of the patellae, a severe hypoplasia of the medial side of the femoral quadriceps, and an external rotation of the proximal tibia particularly evident on the tibial tuberosity (Figure 6).