Figure 1.

Brain imaging. (a) CT without contrast showing a 3.5 × 2.1 cm peripherally hyperdense mass within the left frontal lobe with extensive associated vasogenic edema and a 10 mm left-to-right subfalcine herniation. (b) Diffusion-weighted and (c) T2-weighted MRI showing a 3.5 × 2.4 cm mass within the left frontal lobe compatible with a cerebral abscess. The vasogenic edema involves the left frontal lobe and anterior parietal lobe with diffuse sulcal effacement and left-to-right midline shift. (d) Diffusion-weighted and (e) T2-weighted MRI showing interval improvement in the left frontal lobe abscess cavity with decreased surrounding edema and improvement in the mass effect without midline shift.