From the case:
Periosteal reaction types
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Illustration of periosteal reaction types.
Case Discussion
Periosteal reaction presents in many ways, which makes it possible to classify them into aggressive or non-aggressive, usually related to the underlying bone lesion aggressiveness.
- non-aggressive
- solid
- irregular
- aggressive
- laminated/lamellar: single or multilayered (onion skin appearance)
- spiculated: perpendicular (hair-on-end) or divergent (sunburst appearance)
- disorganized
- Codman triangle