Parotid gland cyst

A cyst is mainly formed when the gland duct is blocked and secretions are retained, causing the parotid gland to swell. It is a retention cyst,

parotid cleft cyst

or dermoid cyst

that occurs in the parotid gland. Parotid cysts are prone to recurrence after treatment, mainly because the walls of parotid cysts are very thin and can easily rupture during surgery. Once ruptured, epithelial tissue may remain

In normal tissues, leading to postoperative recurrence.