American Journal of Medical Case Reports
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American Journal of Medical Case Reports. 2017, 5(8), 199-201
DOI: 10.12691/ajmcr-5-8-1
Open AccessCase Report

The "Penumbra Sign" on Magnetic Resonance Images of Brodie's Abscess: A Case Report and Literature Review

Farate A1, , Yunusa GH2, Umar UH1, Ahmadu MS1, Mustapha Z1 and Ahidjo A1

1Department of Radiology, University of Maiduguri Teaching Hospital, Maiduguri, Borno State, Nigeria

2Department of Radiology, Usmanu Danfodio University Teaching Hospital, Sokoto, Sokoto State, Nigeria

Pub. Date: August 16, 2017

Cite this paper:
Farate A, Yunusa GH, Umar UH, Ahmadu MS, Mustapha Z and Ahidjo A. The "Penumbra Sign" on Magnetic Resonance Images of Brodie's Abscess: A Case Report and Literature Review. American Journal of Medical Case Reports. 2017; 5(8):199-201. doi: 10.12691/ajmcr-5-8-1


This report presents the "penumbra sign" of Brodie's abscess in a 17-year-old boy. The lesion was located in the proximal metaphysis of the left tibia. Histologic and microbiologic confirmation of the diagnosis was made. A "penumbra sign" on non-contrast enhanced T1-weighted magnetic resonance images is a helpful diagnostic sign of Brodie's abscess.

Brodie's abscess magnetic resonance imaging penumbra sign

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