Codman triangle periosteal reaction
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Codman triangle is a type of periosteal reaction seen with aggressive bone lesions. With aggressive lesions, the periosteum does not have time to ossify with shells of new bone (e.g. as seen in single layer and mulitlayeredmultilayered periosteal reaction), so only the edge of the raised periosteum will ossify.
The Codman triangle may be seen with aggressive lesions:
- osteosarcoma
- Ewing sarcoma
- osteomyelitis
- active aneurysmal bone cyst
- giant cell tumour
- metastasis
- chondrosarcoma (especially juxtacortical chondrosarcoma)
- malignant fibrous histiocytoma
History and etymology
It was first described by Ribbert in 1914 2. However, it is named for Ernest Amory Codman, who described it in the setting of Ewing sarcoma 3.
See also
-<p><strong>Codman triangle</strong> is a type of <a href="/articles/periosteal-reaction">periosteal reaction</a> seen with aggressive bone lesions. With aggressive lesions, the periosteum does not have time to ossify with shells of new bone (e.g. as seen in <a href="/articles/single-layer-periosteal-reaction">single layer</a> and <a href="/articles/multilayered-periosteal-reaction">mulitlayered</a> periosteal reaction), so only the edge of the raised periosteum will ossify.</p><p>The Codman triangle may be seen with aggressive lesions:</p><ul>- +<p><strong>Codman triangle</strong> is a type of <a href="/articles/periosteal-reaction">periosteal reaction</a> seen with aggressive bone lesions. With aggressive lesions, the periosteum does not have time to ossify with shells of new bone (e.g. as seen in <a href="/articles/single-layer-periosteal-reaction">single layer</a> and <a href="/articles/multilayered-periosteal-reaction">multilayered</a> periosteal reaction), so only the edge of the raised periosteum will ossify.</p><p>The Codman triangle may be seen with aggressive lesions:</p><ul>
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