The MRI shows marked amount of intra-articular fluid that reflects heterogeneous signal intensity with some bright T1 signal and some iso to low T2 signal denoting blood products of different chronological ages some of which is acute in nature.
Extra-articular fluid/haematoma on the medial aspect with suspected communication with the haemarthrosis raising the possibility of disrupted joint capsule, a findings to be confirmed by arthrography. The haemarthrosis is seen at all joint spaces including the suprapatellar space.
Marked related soft tissue and skin oedema is also seen.
Both the PCL and ACL are completely disrupted. Coronal cuts also revealed torn medial collateral ligament. Both the medial and lateral meniscal horns show tears or degeneration.
The patella is seen high in location on sagittal plane, however the patellar ligaments are intact, likely to be displaced by the significant intra-articular fluid.