Desquamative interstitial pneumonia
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Desquamative interstitial pneumonia, abbreviated DIP, is a diffuse lung disease that is strongly associated with smoking.
| Desquamative interstitial pneumonia | |
|---|---|
| Diagnosis in short | |
|
| |
| LM | abundant brown pigmented airspace macrophages (smoker's macrophages), architecture preserved ("linear fibrosis") |
| LM DDx | amiodarone toxicity, fibrotic NSIP, RBILD |
| Site | lung - see diffuse lung diseases |
|
| |
| Associated Dx | smoking |
| Prevalence | uncommon |
| Treatment | stop smoking |
General
- Uncommon.
- Strong association with smoking.[1][2]
- Thought to be advanced RBILD.
- May be seen in non-smokers (up to ~40% of cases) due to occupational exposures, drugs, viral illnesses and autoimmune diseases.[3]
Treatment:
- Stop smoking/remove or manage underlying cause.
Microscopic
Features:
- Abundant brown pigmented airspace macrophages - smoker's macrophages - key feature.
- Architecture preserved; "linear fibrosis".
Notes:
- Some fields of view may be indistinguishable from RBILD.
DDx:
Images
Stains
- Macrophages PAS +ve.
See also
References
- ↑ Humphrey, Peter A; Dehner, Louis P; Pfeifer, John D (2008). The Washington Manual of Surgical Pathology (1st ed.). Lippincott Williams & Wilkins. pp. 93. ISBN 978-0781765275.
- ↑ Margaritopoulos, GA.; Vasarmidi, E.; Jacob, J.; Wells, AU.; Antoniou, KM. (Sep 2015). "Smoking and interstitial lung diseases.". Eur Respir Rev 24 (137): 428-35. doi:10.1183/16000617.0050-2015. PMID 26324804.
- ↑ Godbert, B.; Wissler, MP.; Vignaud, JM. (Jun 2013). "Desquamative interstitial pneumonia: an analytic review with an emphasis on aetiology.". Eur Respir Rev 22 (128): 117-23. doi:10.1183/09059180.00005812. PMID 23728865.