X-ray
Radiographs of the right knee demonstrate a bicondylar tibial plateau fracture, including a vertical fracture line extending through/just lateral to the tibial spines and a transverse fracture line at the medial tibial diametaphysis. There is a narrowing of the lateral compartment joint space. A fibular head fracture and lipohaemarthrosis are seen on the cross-table lateral view.
The circular density is external to the patient.