Double density sign (osteoid osteoma)

Last revised by Frank Gaillard ◉ ◈ on 27 Jul 2022

Citation, DOI, disclosures and article data

Citation:

Gaillard F, Jones J, Weerakkody Y, et al. Double density sign (osteoid osteoma). Reference article, Radiopaedia.org (Accessed on 27 Mar 2023) https://doi.org/10.53347/rID-8428

DOI:

https://doi.org/10.53347/rID-8428

Permalink:

https://radiopaedia.org/articles/8428

rID:

8428

Article created:

1 Feb 2010, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was created Frank Gaillard had no recorded disclosures.

View Frank Gaillard's current disclosures

Last revised:

27 Jul 2022, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was last revised Frank Gaillard had the following disclosures:

Radiopaedia Australia Pty Ltd and Radiopaedia Events Pty Ltd, Director, Founder and CEO (Radiopaedia) (ongoing)
Biogen Australia Pty Ltd, Investigator-Initiated Research Grant for CAD software in multiple sclerosis: finished Oct 2021 (past)

These were assessed during peer review and were determined to not be relevant to the changes that were made.

View Frank Gaillard's current disclosures

Revisions:

16 times, by 5 contributors - see full revision history and disclosures

Systems:

Musculoskeletal, Paediatrics, Central Nervous System, Cardiac

Sections:

Signs

Synonyms:

Hotter spot within hot area sign
Double density sign of osteoid osteomas

The double density sign, also sometimes clumsily referred to as the hotter spot within hot area sign, is a bone scan sign of an osteoid osteoma.

It refers to a central focus of intense uptake (the nidus) within a surrounding lower, but nonetheless increased uptake, rim.