Patient History
29-year-old female with right knee pain made worse with twisting and side to side movements.
Findings
Menisci:
Medial meniscus: Intact.
Lateral meniscus: Intact.
Ligaments:
Anterior cruciate ligament: Intact.
Posterior cruciate ligament: Intact.
Medial collateral ligament: Intact.
Lateral collateral ligament: Intact.
Posterolateral corner structures: Intact.
Extensor mechanism:
Patellar tendon: Intact.
Distal quadriceps tendon: Intact.
Medial patellofemoral ligament: Intact.
Medial and Lateral patellar retinacula: Thickened lateral retinaculum. Otherwise unremarkable.
Hoffa fat pad: Focal superolateral edema, consistent with lateral patellar impingement.
Articulations:
Patellofemoral compartment: Trochlear dysplasia with mild medial facet hypoplasia. Mild lateral patellar tilt and thickened lateral retinaculum. Alta (Insall salvati ratio 1.3). Normal TT-TG distanofing 0.8cm. Minimal chondral fissuring of the lower lateral and medial patellar facet.
Medial compartment: Unremarkable.
Lateral compartment: Unremarkable.
General:
Bones: Unremarkable.
Effusion: None.
Baker’s Cyst: None.
Loose bodies: None.
Neurovascular and soft tissue: Normal.
Conclusion
Patellofemoral maltracking with evidence for lateral patellar impingement (patellar tendon-lateral femoral condyle impingement syndrome).
