18 August 2011

Pneumoparotid


Incidental finding on a trauma CT scan showing air in ducts of the right parotid gland. Note also air in the main parotid duct. This is known as Pneumoparotid. It is caused by periodic increased air pressure in the oral cavity. It can be seen in people playing wind instruments, after dental procedures, coughing and other activities involving forceful exhalation.