中下部显示扩张的支气管，由于坏死性炎症的破坏，粘膜和支气管壁不很清楚。这是支气管扩张的表现。支气管扩张不是特定的疾病,它是其它病变破坏气道的后果。
The mid lower portion of this photomicrograph demonstrates a dilated bronchus in which the mucosa and wall is not clearly seen because of the necrotizing inflammation with destruction. This is the microscopic appearance of bronchiectasis. Bronchiectasis is not a specific disease, but a consequence of another disease process that destroys airways.
