Avulsion fracture

The posterior cruciate ligament attaches to the posterior aspect of the tibial plateau.

Avulsion fracture at the site of the tibial attachment of the PCL can occur with trauma of variety mechanism. Treatment involves reducing the avulsed fragment into the tibia whilst ensuring that the PCL is not torn.

Another pertinent finding in the radiograph above is the opacification of the infrapatellar (Hoffa) fat pad which indicates presence of knee effusion.