Doughnut sign on bone scan

The doughnut sign refers to bone scan pattern which demonstrate increased uptake peripherally with a photopenic center. This appearance may be seen in a number of cystic lesions include:

The doughnut sign is a nonspecific sign, and also can be present in chondrosarcoma, telangiectatic osteosarcoma and any other lesions that show aneurysmal bone cyst changes within. It has also been described in non-traumatic avascular necrosis.

Share article

Article information

rID: 23434
Section: Signs
Tags: stub, cases
Synonyms or Alternate Spellings:
  • Doughnut sign of bone
  • Donut sign on bone scan

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Figure 1: doughnut
    Drag here to reorder.
  • Drag
    <br />
     Case 1
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

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

    Alert accept Thank you for updating your details.