Background: Patellar dislocation
is one of the most common knee injuries in the adolescent population.
Recurrent patellar instability is not an uncommon entity with acute patellar dislocation
accounting for 2% to 3% of all knee injuries  and is the second most common cause of traumatic knee hemarthrosis.
Familial association of femoral trochlear dysplasia with recurrent bilateral patellar dislocation
A 7-year-old girl (height, 94 cm; weight, 15.1 kg) with Down syndrome was scheduled for right patellar dislocation
Dysplasia of the lateral femoral condyle is particularly important, because of the bony support that prevents lateral patellar dislocation
. Although cartilage of the patellofemoral joint is visualized in CT scans and MRI, both methods provide images of the centre of the patellar articular cartilage .
For more than 11 years, we followed two boys with SBBYS syndrome presenting patellar dislocation
. Initially, both were managed conservatively.
Although sacrifice of the SLGA may occurs during lateral soft tissue release, some have suggested no effect on soft tissue healing, patellar dislocation
, radiolucency, loosening, or fracture.
Keywords: Knee, Multiligament injuries, Medial collateral ligament, Medial patellofemoral ligament, Patellar dislocation
Duthon, "Acute traumatic patellar dislocation
," Orthopaedics & Traumatology: Surgery & Research, vol.
(10) (With the patient lying with the knee flexed to 20[degrees], place thumbs on the medial patella and push laterally; the patient will straighten leg with pain or "apprehension" prior to patellar dislocation
Other pathologies to consider in an adolescent with knee pain, tenderness and disability of the knee joint (of the extensor mechanism) include patellar ligament rupture, quadriceps tendinopathy, quadriceps tendon rupture, patellar dislocation
, chondromalacia patellae and prepatellar bursitis.
A case of intra-articular synovial lipoma of the knee joint causing patellar dislocation
.Knee Surg Sports Traumatol Arthrosc 2010;18(8):1094-1097.