Other interstitial pneumonitis / fibrosis
Reviewers: Elliot Weisenberg, M.D. (see Reviewers page)
Revised: 25 September 2011, last major update September 2011
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● Usually incidental post-mortem finding associated with debilitating disease
● Lipid either exogenous (from nasal sprays or inhalation of other lipid containing substances) or endogenous (bronchial obstruction)
● Well-circumscribed, firm with prominent lymphatics on lung surface in exogenous type
Yellow cut surface
● Lipoid material (or empty spaces), inflammatory cells and young fibroblasts
● Reactive endarteritis, marked alveolar lining cell hyperplasia and lipid-laden foamy macrophages
Foamy macrophages in alveolar spaces
End of Lung-nontumor > Other interstitial pneumonitis / fibrosis > Lipoid pneumonia
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