CT
The CT scan shows an expanded osteolytic cortical lesion with internal soft tissue density and well-defined sclerotic margins located in the proximal diaphysis of the tibia measuring 4.2 x 1.8 x 2.0 cm. There is pronounced thinning of the posterior cortical bone, without clear signs of fracture. No periosteal reaction or soft tissue mass.
Subcutaneous oedema, soft tissue emphysema and a small cortical rupture indicate the site of the percutaneous biopsy.