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Figure 1a: Images in a 60-year-old man with AML with minimal fat. (a) Unenhanced CT scan and (b, c) contrast-enhanced CT scans obtained at corticomedullary (b) and nephrographic and/or excretory (c) phases show a mass (arrow) in the left kidney, without intratumoral fat and with homogeneous enhancement and prolonged enhancement pattern. (d, e) Signal intensities of the tumor (arrow) and spleen (not shown) are 588 au and 687 au, respectively, at in-phase transverse MR imaging (152/5.3) (d) and 290 au and 670 au, respectively, at opposed-phase transverse MR imaging (152/2.7) (e). Signal intensity index is 51%, and tumor-to-spleen ratio is –49%. This tumor was considered an AML with minimal fat at double-echo chemical shift imaging and confirmed as an AML at histopathologic examination.
