CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2011; 21(04): 264-266
DOI: 10.4103/0971-3026.90684
Musculoskeletal Radiology

Case report: Dot-in-circle sign - An MRI and USG sign for "Madura foot"

Anitha Sen
Department of Radiodiagnosis, Devi Scans, Medical College, Thiruvananthapuram, India
,
Rajesh Subramonia Pillay
Department of Rheumatology, Kerala Institute of Medical Sciences, Thiruvananthapuram, Kerala, India
› Author Affiliations

Abstract

Mycetoma is a chronic granulomatous disease that is more common in tropical than in temperate regions. Early diagnosis is important due to the therapeutic implications. Although biopsy and microbiological culture provide definitive diagnosis, they are time-consuming procedures and may not be able to provide a definite diagnosis in cases of fastidious organisms. The "dot-in-circle" sign has recently been proposed as a highly specific magnetic resonance imaging (MRI) and ultrasonography (USG) sign of mycetoma, which may allow a noninvasive as well as early diagnosis. We present a case of histologically proven mycetoma that demonstrated this sign.



Publication History

Article published online:
30 July 2021

© 2011. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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