Codman triangle
Codman Triangle (pronunciation: /'kɒdmən 'traɪæŋɡəl/) is a medical term used in radiology and orthopedics. It refers to a specific radiographic sign that is often associated with aggressive bone lesions.
Etymology
The term is named after the American surgeon Ernest Amory Codman, who first described this radiographic sign.
Definition
A Codman triangle is a type of periosteal reaction in the bone that occurs when a lesion raises the periosteum away from the bone, creating a triangle-shaped area visible on radiographs. This sign is often associated with aggressive bone lesions, such as osteosarcoma, Ewing's sarcoma, and osteomyelitis.
Related Terms
- Periosteum: A dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.
- Osteosarcoma: A type of cancer that produces immature bone. It is the most common type of cancer that arises in bones, and it is usually found at the end of long bones, often around the knee.
- Ewing's sarcoma: A rare type of cancer that occurs in bones or in the soft tissue around the bones.
- Osteomyelitis: An infection in a bone. Infections can reach a bone by traveling through the bloodstream or spreading from nearby tissue.
See Also
External links
- Medical encyclopedia article on Codman triangle
- Wikipedia's article - Codman triangle
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