Lateral patellar dislocation injury with detached osteochondral fracture
Presentation
Patient came on a wheelchair suffering from right knee joint pain post accidental falling down at home x 1 day.
Patient Data
Right knee
Chip avulsion fracture of the patella with joint effusion.
Right knee
Absence of articular cartilage at the medial patellar facet, with mild subjacent bone marrow edema and a small (1.4 cm linear ) floating osteochondral fragment within the medial knee gutter.
Lateral femoral condyle bone marrow edema "contusion".
Medial patellar retinaculum injury with lateral patellar displacement.
Grade I proximal MCL injury.
Large knee joint effusion is noted with fluid/fluid level (hemarthrosis).
Muscle edema and contusions in vastus lateralis and medialis.
Rest of the visualized other extensor mechanism structures are preserved. Lateral collateral complex and cruciate ligaments are preserved. Menisci are unremarkable.