Posterior cruciate ligament avulsion fracture

Case contributed by Dr Bruno Di Muzio

Presentation

Trauma.

Patient Data

Age: 18-year-old
X-ray

Right knee radiographs

There is a knee joint lipohemarthrosis. Minimally displaced fracture from the posterior tibial plateau is likely due to avulsion of the PCL with a bone fragment.
MRI

Right knee MRI

Minimally displaced avulsion fracture of the posterior tibial plateau at the insertion of the posterior cruciate ligament. Increased signal at the mid portion of the PCL infers partial tear. The anterior cruciate ligament is intact. Bone marrow edema involving the intercondylar eminences and lateral tibial plateau. Lipohemarthrosis in moderate volume. The collateral ligaments and the menisci appear intact. Medial posterior and lateral posterior corners tendons are preserved. Quadriceps tendon, patella, and patellar ligament are preserved. Popliteal fossa major vessels have normal flow-void. Mild subcutaneous edema around the knee.

Case Discussion

Posterior cruciate ligament avulsion fracture with a moderate focal partial tear of the mid ligament, associated with tibial plateau bone marrow edema and lipohemarthrosis

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Case information

rID: 47572
Published: 28th Aug 2016
Last edited: 14th Aug 2019
Tag: rmh
Inclusion in quiz mode: Included

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