Oncological and Functional Outcomes after Hemicortical Resection and Biological Reconstruction Using Allograft for Parosteal Osteosarcoma of the Distal Femur

Figure 5

Computer tomography (CT) of the right femur in a 32-year-old male with parosteal osteosarcoma of the distal femur (a). Sagittal CT with multiple large-ossified masses adjacent to the posterior surface of the distal femur (b). Axial view displaying the tumor's broad-based stuck attached to cortical surface associated with dense central ossification and the cleft sign that separated the ground glass mass from the bone cortex, with no evidence of medullary involvement (c). Magnetic resonance imaging of the distal femur (sagittal (d) and axial (e) views) showing the round mass of low signal intensity on T1-weighted imaging. The cortex appears intact along the deep surface of the lesion.