(A) Pre-contrast axial T1-weighted MR revealed multiple left temporal lesions with hypo-intense central cavity and moderately hypo-intense surrounding edema.
(B) T2-weighted and (C) fluid attenuated inversion recovery (FLAIR) axial MR revealed multiple hyper-intense lesions and surrounding hyper-intense edema. (D) Diffusion-weighted MR demonstrated high signal intensity, with (E) a corresponding reduction in the apparent diffusion coefficient. This was directly related to the cellularity and viscosity of the pus contained within the abscess cavities. In contrast, tumors with central necrosis had an appearance of marked hypo-intensity on diffusion-weighted images and hyper-intensity on the apparent coefficient map. (F) Post-gadolinium T1-weighted scan showed thick ring enhancement and increased enhancement of the adjacent dura