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 20 Apr 2024) https://doi.org/10.53347/rID-31431
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rID:
31431
Article created:
8 Oct 2014,
Manchikanti Venkatesh
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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
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7 contributors -
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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 centre 1.
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References
- 1. Jain V, Makwana G, Bahri N, Mathur M. The "Dot in Circle" Sign on MRI in Maduramycosis: A Characteristic Finding. J Clin Imaging Sci. 2012;2:66. doi:10.4103/2156-7514.103056 - Pubmed
- 2. Kumar J, Kumar A, Sethy P, Gupta S. The Dot-In-Circle Sign of Mycetoma on MRI. Diagn Interv Radiol. 2007;13(4):193-5. - Pubmed
- 3. Cherian R, Betty M, Manipadam M et al. The “dot-In-Circle” Sign — a Characteristic MRI Finding in Mycetoma Foot: A Report of Three Cases. BJR. 2009;82(980):662-5. doi:10.1259/bjr/62386689 - Pubmed
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