Dot in a circle sign
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.
- 1. Jain V, Makwana GE, Bahri N et-al. The "dot in circle" sign on MRI in maduramycosis: a characteristic finding. J Clin Imaging Sci. 2012;2 (1): 66. doi:10.4103/2156-7514.103056 - Free text at pubmed - Pubmed citation
- 2. Kumar J, Kumar A, Sethy P et-al. The dot-in-circle sign of mycetoma on MRI. Diagn Interv Radiol. 2008;13 (4): 193-5. Pubmed citation
- 3. Cherian RS, Betty M, Manipadam MT et-al. The "dot-in-circle" sign - a characteristic MRI finding in mycetoma foot: a report of three cases. Br J Radiol. 2009;82 (980): 662-5. doi:10.1259/bjr/62386689 - Pubmed citation