Posterior cruciate ligament injury with posterolateral corner injury
Presentation
Direct impact on playing sport, ongoing pain, limited extension and flexion.
Patient Data
Large knee joint effusion.
No meniscal tear. Anterior cruciate ligament is intact. Posterior cruciate ligament is ruptured with its proximal to midportion.
High signal deep of the proximal deep medial collateral ligament; superficial medial collateral ligament is intact. Small focus of high signal deep to the medial aspect of the semimembranosus enthesis.
High signal around and within the conjoint tendon of the lateral collateral ligament complex reflecting partial tear. Myotendinous injury of popliteus with small intramuscular hematoma. Popliteofibular ligament tear at the fibular styloid. Arcuate ligament tear. Muscle injury to the fibular attachment of the soleus with myofascial edema present.
Quadriceps tendon is intact. Mild distal patellar tendinosis. Tricompartmental articular cartilage is preserved.
Case Discussion
Posterolateral corner injuries are highly associated with posterior cruciate ligament tears. Additionally, there is a partial tear to the proximal deep medial collateral ligament.
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