Dark bronchus sign

Dark bronchus sign is the appearance of relatively darker bronchus to the adjacent ground glass opacity. If the ground glass opacity progress to consolidation, air bronchograms will be visualised. 

This sign is useful to identify diffuse ground glass opacity on HRCT in cases of Pneumocystis jirovecii pneumonia who may present with a normal or equivocal chest radiograph in the early course of disease 1.

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Article information

rID: 30516
System: Chest
Section: Signs
Tag: cases
Synonyms or Alternate Spellings:
  • Blank bronchus sign

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