Diseases

Cryptogenic Organizing Pneumonia

An interstitial lung disease of unknown etiology, occurring between 21-80 years of age. It is characterized by a dramatic onset of a pneumonia-like illness with cough, fever, malaise, fatigue, and weight loss. Pathological features include prominent interstitial inflammation without collagen fibrosis, diffuse fibroblastic foci, and no microscopic honeycomb change. There is excessive proliferation of granulation tissue within small airways and alveolar ducts.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

An interstitial lung disease of unknown etiology, occurring between 21-80 years of age. It is characterized by a dramatic onset of a pneumonia-like illness with cough, fever, malaise, fatigue, and weight loss. Pathological features include prominent interstitial inflammation without collagen fibrosis, diffuse fibroblastic foci, and no microscopic honeycomb change. There is excessive proliferation of granulation tissue within small airways and alveolar ducts.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

10 entry terms
  • BOOP Bronchiolitis Obliterans Organizing Pneumonia
  • Bronchiolitis Obliterans Organizing Pneumonia
  • Primary Organizing Pneumonia
  • Cryptogenic Organizing Pneumonias
  • Organizing Pneumonia, Cryptogenic
  • Organizing Pneumonia, Primary
  • Organizing Pneumonias, Primary
  • Pneumonia, Cryptogenic Organizing
  • Pneumonia, Primary Organizing
  • Primary Organizing Pneumonias

MeSH Record

Aspects Covered

35 allowable subheadings

Indexed with the subheadings blood, cerebrospinal fluid, chemically induced, classification, complications, congenital, diagnosis, diagnostic imaging, diet therapy, drug therapy, economics, embryology, enzymology, epidemiology, ethnology, etiology, genetics, history, immunology, metabolism, microbiology, mortality, nursing, parasitology, pathology, physiopathology, prevention & control, psychology, radiotherapy, rehabilitation, surgery, therapy, urine, veterinary, virology.

MeSH Record

Indexing Annotation

note entry term BRONCHIOLITIS OBLITERANS ORGANIZING PNEUMONIA: do not confuse with BRONCHIOLITIS OBLITERANS

MeSH Record

History Note

2009 (1995)

MeSH Record

Previous Indexing

  • Bronchiolitis Obliterans (1988-1994)
  • Pneumonia (1985-1993)

MeSH Hierarchy

Tree Numbers

  1. C08w.127.446w.135w.140w.600.750w
  2. C08w.381.483w.652w.500w.750w.249w
  3. C08w.381.495w.146w.135w.140w.600.750w

AMA Style

References

  1. National Library of Medicine. Cryptogenic Organizing Pneumonia. Medical Subject Headings (MeSH). 2026. Unique ID D018549. http://id.nlm.nih.gov/mesh/2026/D018549
  2. Cryptogenic Organizing Pneumonia. In: Wikipedia. https://en.wikipedia.org/wiki/Cryptogenic_organizing_pneumonia
  3. Cryptogenic Organizing Pneumonia. In: Wikidata. https://www.wikidata.org/wiki/Q2012642