Air crescent sign
Citation, DOI and case data
Acute myeloblastic leukemia
- Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.
Loading Stack -
0 images remaining
A rounded cavity in the apical right upper lobe, with a non-dependent soft-tissue nodule within it is noted. There is some subtle ground-glass opacity surrounding the lesion. There were several other similar lesions in the right lung (not shown).
The imaging features, combined with the clinical history, are characteristic of invasive fungal infection, most commonly due to Aspergillus spp. Care should be taken to avoid confusion with mycetoma, which occurs in patients with pre-existing lung cavities, is gravity-dependent, and lacks the ground-glass halo.
Invasive aspergillosis occurs in immunosuppressed individuals and carries a 65-90% mortality rate if improperly treated. Cavitation occurs in the recovery phase and thus tends to indicate a better prognosis.
- Abramson S. The Air-Crescent Sign. Radiology. 2001; 218:230-232
1 article features images from this case
12 public playlist include this case
- Paed Viva by Dr Saneej Kanhirat
- Imanchest by Iman Fani
- GK - Chest - Infection by GLK
- GD: Chest signs by Dr Gurjeet Dulku
- Chest by Dr Chester Chong
- Lunge by Ulrike Bartosch
- pluca by dragan
- CHEST by Dr Dr Angel Mthalane
- Chest - classic signs by Dr David Serich
- Common signs by Dr Abdullah Hajar
- Onco18-P25 by tuanleminh
- Chest by joseph yacoub shehata