morphologic parameters supporting this conclusion included the presence of fused basement membrane beneath reactive bronchiolar epithelium in the rb , the presence of similar basal laminar changes in both the rb and proximal alveolar duct septal tips , and the observation that most severe epithelial damage and inflammation occurred in the most proximal alveolar duct rather than in the terminal bronchiole .
C0006270
bronchiolar
C1179179
epithelium