Legend Axial T2WIs demonstrate a large heterogeneous mass in the left temporal and occipital lobes. The mass is hyperintense centrally, with a peripheral rim of hypointensity, possibly related to hemosiderin or free radicals. Adjacent vasogenic edema is noted with significant mass effect and mid line shift. The right lateral ventricle is dilated.

Legend Left: Axial FLAIR shows similar findings as seen on T2WIs. Middle: Coronal T1WI shows an intermediate signal lesion. Temporal lobe herniation (arrow) through the tentorial incisura produces mass effect on the midbrain. Right: Axial DWI shows a markedly hypointense lesion with no restricted diffusion. Surrounding hyperintensity likely is T2 shine-through from surrounding edema.

Legend Axial and Coronal post contrast T1WIs with fat saturation show irregular peripheral enhancement. Key words: mri infection inflammation

Brain Diagnosis: Aspergillus abscess in an immune-competent patient