Dot in a circle sign

Last revised by Mostafa Elfeky on 22 Dec 2023

Citation, DOI, disclosures and article data

Citation:

Venkatesh M, Elfeky M, Foster T, et al. Dot in a circle sign. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-31431

DOI:

https://doi.org/10.53347/rID-31431

Permalink:

https://radiopaedia.org/articles/31431

rID:

31431

Article created:

8 Oct 2014, Manchikanti Venkatesh

Disclosures:

At the time the article was created Manchikanti Venkatesh had no recorded disclosures.

View Manchikanti Venkatesh's current disclosures

Last revised:

22 Dec 2023, Mostafa Elfeky ◉

Disclosures:

At the time the article was last revised Mostafa Elfeky had no financial relationships to ineligible companies to disclose.

View Mostafa Elfeky's current disclosures

Revisions:

9 times, by 7 contributors - see full revision history and disclosures

Systems:

Musculoskeletal

Sections:

Signs

Tags:

mycetoma, madhuramycosis, cases

Dot in a circle sign is an MRI sign for maduromycosis or mycetoma.

It is described as a classic appearance on T2 weighted images which show a small rounded hyperintensity (representing granulation tissue), surrounded by a low signal intensity rim (representing fibrous septa) with a hypointense dot (representing susceptibility loss due to fungi) in the center ¹.