- Characteristics:
- permeative
destructive lesion in which amorphous neoplastic bone is detected;
- lesion is predominately
osteoblastic, but may have osteolytic component;
- cortical destruction, lack of containment;
-
periosteal bone formation, & poorly defined margins;
- periosteal reaction may take the form of triangular area of bone at the
cortical margins produced by periosteal elevation (Codman's triangle);
-
Sun Burst pattern:
- amorphous, neoplastic bone spicules arising perpendicular to long axis
of the limb;
-
differential diagnosis:
-
Ewing's sarcoma;
-
osteomyelitis
-
Osteoblastoma;
- CT Scan:
- used to detect radiographically occult pulmonary metastases;
- helps to determine response to chemotherapy and plan surgical approach;
