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A 64-year-old man with PMF who worked in coal mines for 20 years. Axial contrast-enhanced computed tomography image (a) shows an ill-defined mass (arrow). Axial T1-weighted SE image (b) shows an isointense lesion (arrow). There is no marked diffusion restriction (arrow) on DWI (c, arrow). The lesion has a mildly hyperintense appearance (arrow) with an ADC value of 1.2 on the ADC map of DWI (d).
