细支气管炎是直径小于2mm的传导气道的炎症过程,以膜性和呼吸性细支气管及其周围的炎症细胞浸润和(或)伴有基质增厚为病理特征。虽然炎症细胞、基质细胞及胶原沉积的程度和分布不同会形成不同的组织学、影像学和临床表现,但细支气管的炎症性病变常常呈小叶中心分布,可以被高分 Bronchiolitis is an inflammatory process of the airway that is less than 2 mm in diameter and is infiltrated with membranous and respiratory bronchioles and surrounding inflammatory cells and / or accompanied with stromal thickening as pathological features. Although the degree and distribution of inflammatory cells, stromal cells, and collagen deposition vary with histology, imaging, and clinical presentation, the bronchial inflammatory lesions often exhibit centrilobular distribution that can be scored as high