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Osteosarcoma

Terms in this set (6)

Name 2 most common types of malignant bone tumors in pediatric population.
Osteosarcoma
Ewing's sarcoma
What is age distribution of osteosarc?
Bimodal
- teens
- > 65 yrs
What raiographic features distinguish osteosarc from Ewings?
Osteosarc: sclerotic, involves metaphysis, has periosteal new bone formation (sunburst pattern)

Ewings: lytic, located in diaphysis, 'onion skin' effect
What is most common site of met from osteosarc?
Lung
What are TNM stage categories for bone tumors?
T1 < 8cm
T2 > 8cm
T3 discontinuous tumors in primary bone site
N0 no regional LN
N1 regional LN
M1a lung mets
M1b non-pulm mets
Define Musculoskeletal Tumor Society (MSTS) staging system for bone sarcoma.
Stage 1 (low grade)
1A: intracompartment
1B: extracompartment

Stage 2 (high grade)
2A: intracompartment
2B: extracompartment

Stage 3 (DM)
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