Extensive acute inflammation may lead to abscess formation, as seen here with rounded abscesses (the purulent material has drained out after sectioning to leave a cavity) in upper lobe and lower lobe.

• 广泛的急性炎症可导致脓肿形成，如图所示，肺上叶和肺下叶可见圆形脓肿(脓液排出后在切面上显示为空洞)。