| Health / Medical Topics |
Alveoli Epithelial Hyperplasia of the Mouse Pulmonary System
Solitary or multiple foci of increased cellularity distal to terminal bronchioles. The background of broncho-alveolar architecture remains detectable, and epithelial cells are usually single layered. Round to oval hypertrophic type II pneumocytes with abundant eosinophilic cytoplasm line alveolar walls. In bronchiolar subvariant, also called bronchiolization of alveoli, alveolar walls are lined by cuboidal to columnar cells with features of bronchiloar differentiation such as formation of cilia, Clara cell resemblance and presence of mucous granules. Foci of consolidation may indicate early stages of adenoma formation. Macrophages may be present in the alveolar lumens. (NCI Thesaurus/MMHCC)
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