Ankle Trauma (Football Injury)
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The calcaneal lesion is hyperintense on both T1 and T2 weighted images. There is central hypointensity on T1 within the lesion. STIR images reveal patchy peripheral fat suppression.
Calcaneal lipomas may show the above imaging findings due to presence of central fluid areas with peripheral fibrofatty regions.
the central T1 hypointensity may be due to fluid component.
Central hemorrhage may also give rise to differential signal intensity characterstics like in this case.
- MR Findings of Calcaneal Intraosseous Lipoma with Hemorrhage Hyo-Sung Kwak, Kwang-Bok Lee, Sang-Yong Lee and Young-Min Han AJR November 2005 vol. 185 no. 5 1378-1379