Pneumoparotid is the presence of gas in the parotid gland or salivary ducts. It is the result of an increase in intraoral pressure and the subsequent forced entry of air through Stensen's duct. Pneumoparotid can be caused by dental instrumentation, positive-pressure ventilation during anesthesia, chronic cough, and playing a wind instrument and other physical activities that involve forceful exhalation The clinical examination can reveal unilateral or bilateral parotid swelling, subcutaneous emphysema, or frothy salivary secretions. Computed tomography (CT) and standard sialography confirm the diagnosis. Treatment is aimed at the elimination of precipitating factors. Two treatments have been considered for sialadenitis
secondary to recurrent or chronic episodes of pneumoparotid: transposition of Stensen's duct and parotidectomy