Spanish onion (photo)

Case contributed by Frank Gaillard
Diagnosis not applicable

Spanish onion demonstrating alternating layers reminiscent of onion-skin periosteal reaction.

Photo credit: Dr Frank Gaillard

Case Discussion

Multilayered periosteal reaction, also known as a lamellated or onion skin periosteal reaction, demonstrates multiple concentric parallel layers of new bone adjacent to the cortex, reminiscent of the layers on an onion.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

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

 Thank you for updating your details.