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==Normal histology== | ==Normal histology== | ||
===Cells=== | ===Cells=== | ||
Common: | |||
*Type I pneumocyte - cover most of the alveolar surface. | *Type I pneumocyte - cover most of the alveolar surface. | ||
*Type II pneumocyte - stem cell, produce surfactant. | *Type II pneumocyte - stem cell, produce surfactant. | ||
**Typical location: "angle of alveolus". | **Typical location: "angle of alveolus". | ||
*Macrophages. | *Macrophages. | ||
Rare: | |||
*Pulmonary neuroendocrine cells:<ref name=pmid18001162>{{cite journal |author=Cutz E, Yeger H, Pan J |title=Pulmonary neuroendocrine cell system in pediatric lung disease-recent advances |journal=Pediatr. Dev. Pathol. |volume=10 |issue=6 |pages=419–35 |year=2007 |pmid=18001162 |doi=10.2350/07-04-0267.1 |url=}}</ref> | |||
**Histomorphology: | |||
***Single cells. | |||
***Small clusters ~ 6 cells ("neuroepithelial bodies"). | |||
**Identified with [[immunostains]]: | |||
***Serotonin. | |||
***Bombesin. | |||
***Chromogranin A. | |||
***Synaptic vesicle 2. | |||
===Lung lobule=== | ===Lung lobule=== |
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