Large well-defined multiloculated expansile lytic lesion along the right femoral shaft of relatively homogeneous hypodense content with foci of calcification, displacing the adjacent muscles. Associated endosteal scalloping, trabeculations, septations, with extensive cortical breakthrough and cortical fracture.
The deep and superficial femoral arteries are patent with normal calibre.
Diffuse osteopenia with features of haemophilic arthropathy of the knee.