Fig. 3

Brain magnetic resonance imaging scans. a Diffusion-weighted imaging (DWI). b T1w-weighted (T1w) imaging. c T1w + gadolinium. d T2-weighted (T2w) imaging. Images show an enormous pituitary mass exhibiting atypical features such as a heterogeneous mixed high- and low-signal T1w and T2w with rim enhancement. DWI showed a mild and partial high intensity in the central part of the mass. These features suggest a mixed cystic and hemorrhagic nature of this pituitary abscess