Ruptured anterior cruciate and medial collateral ligaments

Case contributed by Dr Henry Knipe


Injury at sports training.

Patient Data

Age: 20 years
Gender: Male

Large joint effusion. Moderate sized Baker’s cyst, partially ruptured superiorly.

Menisci are intact. Full-thickness tear of the medial collateral ligament. Lateral collateral ligament is intact. Full-thickness tear of the anterior cruciate ligament within the proximal to mid fibers. Posterior cruciate ligament is intact. Minor hyperintensity around the arcuate ligament. Popliteus tendon is intact.

Osteochondral impaction fractures of the lateral terminalis sulcus and posterolateral tibial plateau. Articular cartilage within all three compartments is otherwise preserved.

Case Discussion

Pivot-shift mechanism of injury results in complete rupture of the anterior cruciate ligament and complete rupture of the medial collateral ligament and low-grade posterolateral corner injury.

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Case information

rID: 59185
Published: 26th Mar 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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