Fig. 3.

Imaging findings of the anterior mediastinal masses. (A) 18F-Fluorodeoxyglucose-positron emission tomography (FDG-PET), (B) unenhanced chest computed tomography (CT), (C) axial T2-weighted image (T2WI), and (D) axial diffusion-weighted image (DWI) (b = 1000 s/mm²). FDG-PET shows multiple anterior mediastinal masses with a maximum standardized uptake value (SUVmax) of 2.72 (A, arrows). Unenhanced CT shows calcification within the masses (B, arrows). The masses show homogeneous hypointensity on T2WI and do not show hyperintensity on DWI, indicating no diffusion restriction (C, D, arrows).