This site is targeted at medical and radiology professionals, contains user contributed content and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

Codman triangle periosteal reaction

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 mulitlayered periosteal reaction), so only the edge of the raised periosteum will ossify.

The Codman triangle may be seen with aggressive lesions:

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

Updating… Please wait.


Error Unable to process the form. Check for errors and try again.

Alert_accept Thank you for updating your details.