Displaced fracture of the posterior and medial articular surface of the upper tibia is seen with adjacent bone marrow oedema. The fracture is at the expected site of the tibial insertion of the posterior cruciate ligament which is retracted.
Knee joint effusion.
The medial and lateral collateral, patellar, and anterior cruciate ligaments are normal. The quadriceps, semimembranosus tendons are normal. The menisci are normal.
However, there is peritendinous and intramuscular fluid of the popliteus muscle and haemorrhage/fluid in the popliteal fossa between the popliteus, soleus and medial and lateral bellies of the gastrocnemius muscle.