Case contributed by Dr J Yeung


Shortness of breath and noisy breathing.

Patient Data

Age: Child


Findings of croup. 

Case Discussion

Acute laryngotracheobronchitis, also named croup, is due to parainfluenza virus infection. It usually affects children of 2-3 years old. Patients usually present with stridor.

Typical x-ray findings included steeple sign, causing narrowing below the lower margins of pyriform sinus, seen on frontal projections.

Narrowing of the upper trachea and distension of the hypopharynx are seen on lateral neck projections.

PlayAdd to Share

Case information

rID: 13539
Published: 21st Apr 2011
Last edited: 18th Dec 2015
Inclusion in quiz mode: Included

Updating… Please wait.

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.