Diffuse panbronchiolitis: Diagnosis and distinction from various pulmonary diseases with centrilobular interstitial foam cell accumulations

Masatoshi Iwata, Thomas V. Colby, Masanori Kitaichi

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

Diffuse panbronchiolitis (DPB) is a clinicopathologic entity characterized histologically by chronic inflammation principally affecting the respiratory bronchioles. Few pathologists outside Japan are familiar with this entity. The most distinctive pathologic feature of DPB is chronic inflammation and an accumulation of foam cells in the walls of the respiratory bronchioles, adjacent alveolar ducts, and alveoli (PB unit lesion). The differential diagnosis is important both clinically and histologically because of the similarity of DPB to other chronic airway diseases. We report seven cases of DPB and 20 examples of a histologically similar lesion (PB-like lesion) found in a large review of cases of bronchiolitis, cystic fibrosis, bronchiectasis, aspiration pneumonia, extrinsic allergic alveolitis, Wegener's granulomatosis, bronchocentric granulomatosis, and malignant lymphoma. The results indicate that the PB-like lesion is a nonspecific histologic finding; the diagnosis of DPB can be made only in the appropriate clinical setting and when other conditions have been carefully ruled out.

Original languageEnglish (US)
Pages (from-to)357-363
Number of pages7
JournalHuman Pathology
Volume25
Issue number4
DOIs
StatePublished - Apr 1994

Keywords

  • bronchiectasis
  • cystic fibrosis
  • diffuse panbronchiolitis

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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