Osteosarcoma

Osteosarcoma Radiology

Fig. 8.14a This osteosarcoma in the distal femur shows all the hallmarks of malignancy. Its margin to the bone is unsharp, also referred to as a wide zone of transition. The cortex has been destroyed. The periosteum attempts to cover up the aggressive process, forming the so-called Codman triangle in the upper lateral part (thin arrows). In addition there is ossification in the distal lateral component of the tumor (thick arrow). Do you also see the periosteal reaction on the medial side of the metaphysis? b Pulmonary metastases of osteosarcomas are frequently ossified. This is best appreciated in the mediastinal or bone window settings when reviewing a chest CT.

Fig. 8.14a This osteosarcoma in the distal femur shows all the hallmarks of malignancy. Its margin to the bone is unsharp, also referred to as a wide zone of transition. The cortex has been destroyed. The periosteum attempts to cover up the aggressive process, forming the so-called Codman triangle in the upper lateral part (thin arrows). In addition there is ossification in the distal lateral component of the tumor (thick arrow). Do you also see the periosteal reaction on the medial side of the metaphysis? b Pulmonary metastases of osteosarcomas are frequently ossified. This is best appreciated in the mediastinal or bone window settings when reviewing a chest CT.

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