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Figure 2. A-60-year-old man with brain abscess in the left temporal lobe. (a) Post-contrast CT scan shows a ring-enhancing lesion in the left temporal lobe. The lesion is hypointense on (b) the T1 weighted image and (c) hyperintense on the T2 weighted image with extensive peripheral oedema and a mass effect. (d) Post-contrast T1 weighted image shows a ring-enhancing cystic lesion. The lesion shows a heterogeneous signal intensity on (e) the diffusion weighted image and inversely heterogeneous signal intensity on (f) the apparent diffusion coefficient (ADC) map. (g) Photomicrograph shows that the abscess tissues contain numerous viable inflammatory cells (white arrows), such as neutrophils, lymphocytes and histiocytes, and prominent necrotic cellular debris (black arrows) in the bloody background (Haematoxylin and Eosin, x200)
