Salivary gland fistula
Salivary gland fistulae are almost always related to the parotid gland or duct, although the submandibular gland is rarely the origin.
The usual cause is trauma, however salivary fistula can occur as a complication of surgery, or if the duct becomes obstructed with a calculus.
- van der Waal I (6 December 2012). Diseases of the Salivary Glands Including Dry Mouth and Sjögren's Syndrome: Diagnosis and Treatment. Springer Science & Business Media. pp. 152–153. ISBN 978-3-642-80274-4.