Characteristic | Malignant or aggressive nonmalignant lesions* | Nonmalignant and nonaggressive lesions |
Border | | - Well-defined or sclerotic border
- Sharp zone of transition from normal to abnormal bone
|
Periosteal reaction | - Often present (eg, spiculated, interrupted, wedge-shaped [ie, Codman triangle])¶
| |
Cortical destruction | - Cortical destruction is typical ("moth-eaten" or permeative pattern)
| - Cortical destruction is usually absent
|
Extension | - Extends into the soft tissue
| - Confined by natural barriers (eg, growth plate, cortex)
- Does not extend into the soft tissue
|