Ultrasound suggests that a cystic mass in the parotid gland may be a parotid cyst or tumor. Ultrasound of parotid gland can see the size, border and main shape of parotid gland, and whether there is any space occupation or dilatation of parotid duct in parotid gland.Ultrasound suggests that cystic mass in parotid gland may be parotid gland cyst or parotid tumor, and it can be excluded from lymph node. But note: ultrasound is only an auxiliary means of examination, simple ultrasound results can not confirm the diagnosis, need to be combined with clinical symptoms for further examination, if necessary, surgical resection and sent to the pathology biopsy. Therefore, ultrasound suggests that the cystic mass of parotid gland is mainly considered to be a cyst of parotid gland or parotid tumor, and the specific conditions need to go to the stomatology department of the hospital for medical treatment.