From the case:
Omega sign (photo)
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Omega sign: Laryngoscopic view of the epiglottis in a child with laryngomalacia, demonstrating the omega-shaped epiglottis.
Original file: http://commons.wikimedia.org/wiki/File:Laryngomalacia.jpg
Author: Doctormichael.
License: I (Doctormichael), the copyright holder of this work, hereby release it into the public domain. This applies worldwide.