Dot in a circle sign

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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Article Information

rID: 31431
Section: Signs
Synonyms or Alternate Spellings:

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