脑脓肿，可见薄壁并附有黄色脓液的液化中心。脓肿通常由以下原因引起：细菌感染后通过血液播散、直接贯通伤、临近血窦感染的播散。
This is a cerebral abscess. There is a liquefactive center with yellow pus surrounded by a thin wall. Abscesses usually result from hematogenous spread of bacterial infection, but may also occur from direct penetrating trauma or extension from adjacent infection in sinuses.