Term
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Definition
· Benign neoplasm of skull & facial bones that could progress to “hyperostosis frontalis interna” · Is associated with Gardner syndrome o AD (APC gene; 5q) o Benign bone neoplasm(s) o Multiple polyposis predisposing to colon carcinoma o Epidermoid cysts & fibromas |
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Term
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Definition
· Malignant tumor typically affecting the pelvic bones, spine, and shoulder girdle · Neoplastic hyaline & myxoid cartilage formation that permeates throughout the madullary cavity, grows through the cortex of the bone, and forms a relatively well-circumscribed soft tissue mass · Average age of onset 30 – 60 years |
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Term
Osteosarcoma (oseogenic sarcoma) |
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Definition
- Most common primary malignant tumor of the bone
- Age of onset 10 - 25 years
- Classic X-ray findings
- Codman's triangle
- Sunburst pattern reactive bone formation
- Commonly involves metaphyses of long bones (MC knee)
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Term
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Definition
- Benign but painful neoplasm of cortex of the long bones (MC knee) smaller than 2 cm with round radiolucency with central mineralization and a dense sclerotic rim
- Pain, that is worst @ night, is responsive to NSAIDs
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Term
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Definition
| Same as osteoid osteoma but > 2 cm that often involves the vertebrae |
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Term
| Osteochondroma (exostosis) |
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Definition
- Benign outgrowth of epiphyseal growth plate with marrow, bone, and cartilage cap
- Rare after closure of metaphyseal growth plate
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Term
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Definition
- Uncommon bone neoplasm, affecting females more than the males, characterized by multinucleated giant cells within normal stromal cells
- Knee
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