Primary Bone Tumors
A 16-year-old boy presents with 3 months of progressive knee pain and swelling. Radiographs show an aggressive lesion in the distal femoral metaphysis with periosteal reaction (Codman triangle), soft tissue extension, and a "sunburst" pattern. MRI confirms a large intramedullary lesion with soft tissue mass. Staging CT chest shows no pulmonary metastases. Biopsy confirms high-grade conventional osteosarcoma. Regarding osteosarcoma:
Mark each as TRUE or FALSE
Osteosarcoma is the most common primary malignant bone tumor (excluding myeloma) with bimodal age di...
Radiographic features include aggressive periosteal reaction (Codman triangle from elevated perioste...
Osteosarcoma is most common in the elderly; it typically occurs in the diaphysis; radiographs show a...
Treatment involves neoadjuvant chemotherapy (typically MAP: methotrexate, doxorubicin/Adriamycin, ci...
The Enneking staging system for malignant tumors uses: Stage I (low grade), Stage II (high grade), S...
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Click T (True) or F (False) for each option