Anterior cruciate ligament complete tear with posterior cruciate ligament partial tear and posterolateral corner injury

Case contributed by Dr Salma Babikir Ahmed Erabi
Diagnosis certain


The patient presented after knee trauma with knee swelling and pain.

Patient Data

Age: 30 years
Gender: Female

Non-visualization of the ACL fibers indicative of complete tear.

The PCL is swollen (measuring about 10 mm in maximum thickness ) with high signal intensity in T2WI compatible with a partial tear.

Posterolateral corner injury manifested by:

  • Torn fibular collateral ligament and bicipes femoris tendon insertion.
  • Torn popliteus tendon.
  • Avulsion fracture of the fibular styloid process (arcuate fracture).
  • Sprain of the popliteus muscle.

Grade I injury of the MCL.

Sprain of the medial and lateral heads of the gastrocnemius muscle.

Diffuse extensive subcutaneous and interstitial edema.

Minimal joint effusion with pre & infra-patellar bursitis.

Case Discussion

This is a case of complete ACL tear with a partial PCL tear and posterolateral corner injury.

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