几乎整个右肺中叶都存在慢性脓肿。脓肿区域是黄褐色，非常坚韧。此处引起感染的因素是诺卡菌属,主要引起慢性脓肿。
Almost the entire middle lobe of this right lung is involved by a chronic abscess as seen here on section. The area of abscess is yellow tan, and it was very firm.The infectious agent responsible here was Nocardia, which is known to produce chronic abscessing inflammation.
