X-ray
A focal radiolucent lesion with a thin peripheral sclerotic rim and narrow zone of transition is seen along the posterolateral aspect of the proximal metaphysis of the right tibia. Focal cortical thinning is seen along the lateral aspect of the proximal tibia; however, no periosteal reaction, fracture, or associated soft tissue abnormality is seen. These radiographic features are suggestive of a non-aggressive osseous lesion, like bone cyst.