﻿第五节支气管扩张症支气管扩张症（bronchiectasis）以亚段支气管持续扩张为特征，伴支气管壁及支气管周围组织的炎症性破坏和管腔内渗出物积聚。
O O O O B-dis I-dis I-dis I-dis I-dis I-dis B-dis I-dis I-dis I-dis I-dis I-dis O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O O B-sym I-sym I-sym I-sym I-sym I-sym I-sym I-sym I-sym O O O O O B-bod I-bod I-bod I-bod O B-bod I-bod I-bod I-bod I-bod I-bod I-bod O O O O O O O B-sym I-sym I-sym I-sym I-sym I-sym I-sym I-sym O