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VOLUME 64 , ISSUE 4 ( October-December, 2022 ) > List of Articles


“Air Bubble Sign” and Fibreoptic Bronchoscopy in Complicated Pulmonary Hydatid Cysts: Steps in the Right Direction

Aparna Chatterjee, Mridul Kumar Sarma, Subhra Mitra

Keywords : Air bubble sign, Bronchoscopy, Pulmonary hydatid cyst

Citation Information : Chatterjee A, Sarma MK, Mitra S. “Air Bubble Sign” and Fibreoptic Bronchoscopy in Complicated Pulmonary Hydatid Cysts: Steps in the Right Direction. Indian J Chest Dis Allied Sci 2022; 64 (4):297-299.

DOI: 10.5005/jp-journals-11007-0044

License: CC BY-NC 4.0

Published Online: 05-01-2023

Copyright Statement:  Copyright © 2022; The Author(s).


Intact pulmonary hydatid cysts are often discovered incidentally on chest X-rays (CXRs) as rounded opaque lesions with smooth borders. Cyst rupture and infection (complicated hydatid cyst) often change the radiologic appearance delaying diagnosis. Air bubble sign on computed tomography is recognized as a sign of high sensitivity and specificity in the diagnosis of complicated hydatid cysts when compared to other classical radiologic signs. Bronchoscopy is not a preferred investigation in patients with intact hydatid cysts but may have a major role in patients with complicated hydatid cysts with atypical presentation. In the present case series, we attempt to highlight the importance of the “air bubble sign” and the identification of a whitish membrane at bronchoscopy in the diagnosis of complicated hydatid cysts.

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