Figures index

From

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

Farate A, Yunusa GH, Umar UH, Ahmadu MS, Mustapha Z, Ahidjo A

American Journal of Medical Case Reports. 2017, 5(8), 199-201 doi:10.12691/ajmcr-5-8-1
  • Figure 1. Posteroanterior (a) and lateral (b) radiographs of the left knee: A well-defined radiolucent lesion in proximal metaphysis of tibia is noted. The lesion does not show the usual well-defined marginal sclerosis. Note also thickening of the cortices of tibia
  • Figure 2. Non-enhanced T1-weighted MR images of the left proximal tibia in coronal (a) and sagittal (b) planes: They show a well-defined hypointense intramedullary lesion in the proximal metaphysis of the tibia with a surrounding rim of high signal intensity (¡®penumbra sign¡¯). There is extensive surrounding hypointensity representing marrow edema
  • Figure 3. T2-weighted MR images of the left proximal tibia of the same patient in coronal (a) and sagittal (b) planes: They show a well-defined hyperintense lesion in the metaphysis of tibia with a surrounding rim of hypointensity. At the periphery is a surrounding zone of increased signal intensity representing marrow edema