Aspergillosis CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Haytham Allaham, M.D. [2]; Yazan Daaboul, M.D.; Serge Korjian M.D.


Chest CT scan may be helpful in the diagnosis of aspergillosis. Findings on chest CT scan suggestive of aspergillosis include a well formed cavity, a central soft tissue attenuating oval shaped, well circumscribed mass surrounded by an cresent of air (Monad sign).[1]

CT Scan

  • Chest CT scan may be helpful in the diagnosis of aspergillosis.[1]
  • Findings on chest CT scan suggestive of aspergilloma include:
  • Well formed cavity
  • A central soft tissue attenuating oval, well circumscribed mass
  • Surrounded by an cresent of air (Monad sign)
  • The mass may illustrate mobility as the patients change their position.
  • On certain occasion the mass may entirely fill the cavity, thus it takes on the shape of the cavity, loses its mobility, and obliterates the surrounding air crescent.
  • Marked enlargement of the bronchial arteries that supply the wall of the adjacent respiratory tracts
  • Thickening of the adjacent pleura may be present
  • Findings on chest CT scan suggestive of allergic bronchopulmonary aspergillosis include:[2]
  • Fleeting pulmonary alveolar opacities
  • Centrilobular nodular opacities representing dilated and opacified bronchioles
  • Bronchiectasis
  • Bronchial wall thickening
  • Honey comb appearance



  1. 1.0 1.1 Aspergilloma. Radiopaedia (2015) Accessed on February, 9 2016
  2. Allergic bronchopulmonary aspergillosis. Radiopaedia (2015) Accessed on February, 8 2016