Fig. 1.

MRI of the head and neck. (A, D) Axial T2-weighted images (T2WI), (B, E) axial diffusion-weighted images (DWI) (b = 1000 s/mm²), and (C, F) axial gadolinium-enhanced fat-suppressed T1WI (Gd-FS-T1WI). Well-defined T2-hypointense masses are observed in the left parotid gland and right sublingual gland (A, D, arrows). The masses do not show hyperintensity on DWI, indicating no diffusion restriction (B, E, arrows). Gd-FS-T1WI shows enhancement at the margins and faint enhancement at the center of the mass (C, F, arrows). Atrophy and fatty replacement of the parenchyma is noted in the left parotid gland, suggesting Sjögren syndrome.