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OSTEOSARCOMA - Coggle Diagram
OSTEOSARCOMA
Definition
Malignant bone tumor producing osteoid matrix. Most common primary bone cancer in children/adolescents. Common sites: metaphysis of long bones (distal femur, proximal tibia, humerus)
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Pathophysiology
Linked to genetic mutations (e.g. RB1, TP53)
Tumor invades cortex → extends to soft tissue and metastatic spread, usually to lungs
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Investigations
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X-ray: sunburst pattern, Codman’s triangle
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Examination Findings
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Tender, firm, and sometimes warm mass
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Prevention
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Early detection and monitoring in high-risk patients (e.g. prior radiation, genetic syndromes)
Risk Factors
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Genetic syndromes: Li-Fraumeni, Retinoblastoma (RB1 mutation)