The salivary glands are also known as salivary glands. The human body has four pairs of large salivary glands: parotid, submandibular, sublingual and prelingual glands, as well as many smaller salivary glands located under the oral mucosa. These glands secrete large amounts of saliva, which is discharged into the mouth through ducts to help digest food and also perform functions such as lubrication, protection, cleansing, and antibacterial. The most problematic of the salivary glands is the parotid gland, followed by the submandibular, sublingual and minor salivary glands in that order. The main types of morbidity are: 1) tumor; 2) inflammation; 3) some non-inflammatory non-neoplastic epithelial lesions. In case of masses around the earlobe, upper neck, floor of mouth area and oral mucosa, the possibility of disease of glandular origin should be considered first. Most salivary gland tumors are benign and less likely to be malignant, usually no more than 20%. Do not panic after the appearance of the disease, and go to the oral and maxillofacial surgery department of the regular hospital as soon as possible. Clinical diagnosis and treatment of salivary gland tumors 80% of salivary gland tumors occur in parotid gland, 10% in submandibular gland, 10% in sublingual gland and minor salivary gland. The diagnosis is mainly based on medical history, specialist examination and imaging examinations such as ultrasound, CT and MRI. There are many types of salivary gland tumors and pathological diagnosis is the gold standard for final diagnosis. Surgical resection is the first choice for salivary gland tumor treatment. In most cases, radical cure can be obtained through surgery. Depending on the condition, surgery is performed under local or general anesthesia. If necessary, intraoperative frozen pathological examination will be performed to determine the surgical method and the extent of resection according to the pathological results. 2.Will parotid gland recur after surgery? Surgery is the first choice for parotid tumor treatment. In addition to removing the tumor, the surgery will also remove part or all of the glandular tissue according to the pathological type of the tumor. Through standardized and correct surgical operation, the possibility of recurrence of benign tumors is extremely small, and the recurrence rate of pleomorphic adenoma does not exceed 5%. The overall recurrence rate of malignant tumors is less than 30% after surgery and perfect adjuvant radiotherapy. 3.Will parotid surgery damage the facial nerve? For benign tumors, the facial nerve should be preserved. For malignant tumors, depending on the type of pathology, some facial nerves should be removed while others can be preserved or partially preserved. Whether facial nerve dysfunction will occur after surgery for benign tumors is highly dependent on the surgical skill and operation of the operator. Over the years for basic research, clinical diagnosis and treatment of salivary gland tumors. Improvements in neuroanatomical methods have been carried out in parotid surgery: the retrograde dissection method of searching for the cervical branch of the facial nerve first has significantly reduced the trauma of pulling and squeezing the other major branches, significantly reducing the incidence of postoperative facial paralysis. At the same time, the innervation of the broad cervical muscle was maintained to prevent postoperative muscle atrophy and functional disorders. 4.How to reduce postoperative facial deformity and scars? In our clinical work, we emphasize the combination of oncological surgery and plastic and cosmetic surgery to remove the tumor and cure the disease while enhancing the maintenance of normal maxillofacial functions and the restoration and reconstruction of facial beauty. In addition to conventional plastic surgery operations and treatment to reduce deformities, the following improvements are still available in parotid surgery: (1) Improvement of surgical incisions. In regional adenotomy, a simple postmaxillary incision is applied to avoid preauricular and periapical incisions, reduce the length of incision and flap range, and reduce trauma, bleeding and postoperative scars and facial deformities. In some special patients, intra-hair incisions and postmaxillary incisions are also applied. (2) Application of decellularized dermal tissue patches, this operation can reduce both taste sweating syndrome and facial depression deformity. (3) Postoperative incisions are locally assisted with small doses of superficial radiation therapy, which effectively reduces scar formation and maintains facial aesthetics. 5.Radioactive particle implantation at the same time of surgery For some patients with salivary gland malignancy, radioactive particle implantation is performed at the same time of surgical resection to reduce local recurrence and distant metastasis. Radioactive particle implantation is an advanced minimally invasive treatment, which is different from the common external radiation therapy and belongs to the brachytherapy. The radiation source is placed directly in the surrounding tissues after intraoperative resection of the tumor tissue. This kind of radiation therapy has short effective radiation distance and long action time, and has no adverse effects on other parts of the body and the whole body condition, which is highly efficient, safe, minimally invasive and simple.