Female, 77 years old, with known brain abscess. A prominently cystic lesion is redemonstrated within the left parietal lobe measuring 19 x 13 mm in the axial plane and 20 mm in the coronal plane. By size, the lesion has not significantly changed from prior exams.The lesion is predominantly T2 hyperintense compatible with cystic components. Most of the lesion shows facilitated diffusion, though there is a small amount of nodular restricted diffusion within the lesion, as well as a punctate focus along the lateral margin.Fairly extensive T2 hyperintensity surrounding this lesion, compatible with vasogenic edema, shows little if any significant interval change from the recent prior exams. The regional sulci are effaced, and the left lateral ventricles partly effaced. Background fairly extensive periventricular T2 hyperintensity is also unchanged. The ventricles and sulci are quite prominent, similar to prior exams, likely reflecting parenchymal volume loss. A burr hole defect is seen within the left parietal calvarium overlying the lesion compatible with prior stereotactic biopsy.
1.No significant change in size of the left parietal lobe abscess.2.No significant change in the degree of surrounding vasogenic edema and associated mass effect.