Croup - virtual bronchoscopy

Case contributed by Dr Dalia Ibrahim


Acute respiratory distress, barking cough and inspiratory stridor.

Patient Data

Age: 1-year-old
Gender: Male

Narrowing of the glottic and subglottic regions (giving the steeple sign) by circumferential mucosal thickening encroaching upon its lumen.

Enlarged nasophayrngeal adenoids encroaching upon the nasopharyngeal air column.

Annotated image

Comparison between normal CT virtual bronchoscopy and a CT virtual bronchoscopy for a case of croup.

Narrowing of the glottic and subglottic regions (giving the steeple sign).

Case Discussion

This is a case of a clinically proven croup. Croup, also known as acute laryngotracheobronchitis, is an upper airway infection by parainfluenza virus or respiratory syncytial virus. On imaging, it classically presents with a narrowing of the subglottic airway and ballooning of the hypopharynx. The narrowed subglottic airway (upper trachea) may resemble a church steeple (steeple sign or wine bottle sign) due to its tapered appearance.

Differential diagnosis include:

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Case information

rID: 48468
Published: 7th Oct 2016
Last edited: 23rd Dec 2016
System: Head & Neck
Inclusion in quiz mode: Included

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