CT images and Pathology description: (a) Multiple foci of gas-containing abscesses along the margin of the craniotomy (arrow). (b) Significant increase in the size and extent of the brain abscess (arrow). (c) Resolving brain swelling and abscess. (d) Cerebral abscess in the superior temporal lobe with necrosis, newly formed capillaries, and scattered fibroblasts. The inflammatory infiltrate includes neutrophils, lymphocytes, plasma cells, and histiocytes (stain: hematoxylin and eosin; magnification: ×400).