Background: Benign tumors account for 80% of parotid salivary gland tumors, early diagnosis and effective treatment will contribute to reducing complications of surgery. Objective: To evalutate surgical results of benign parotid tumors on facial paralysis and other complications. Research Methodology: including 51 patients with benign parotid salivary gland tumors at Hue University of Medicine and Pharmacy Hospital from June 2019 to October 2021 were operated on and monitored for facial paralysis after 1 week, 1 month, 3 months, and 6 months according to the House-Brackmann facial nerve grading system and noted other complications. Results: Pleomorphic adenoma and Warthin tumors are the two most common types of benign tumors. The rate of facial paralysis at the time points after 1 week, 1 month, 3 months, and 6 months gradually decreased by 56.9%, 35.3%, 19.6%, 0%, respectively. Most temporary facial paralysis grade II (mild) and grade III (moderate) (classification of House - Brackmann). The surgical method was significantly related to facial paralysis (p < 0.05). Other complications such as numbness around the ear, hemorrhage, sialocele, salivary fistula, depression of facial contour, bad scars. Nevertheless, no cases of tumor recurrence and Frey’s syndrome were recorded after 6 months. Conclusion: Surgery is an effective and safe treatment for benign parotid salivary gland tumors. Facial paralysis accounts for a high incidence after surgery, but it will fully recover after 6 months. Choosing the appropriate treatment method helps to minimize complications and recurrence after surgery of parotid salivary gland tumors. Key words: benign parotid tumors, facial paralysis, parotidectomy.

Background: Parotid gland tumors account for 80% of all salivary gland neoplasms, but 80% of parotid tumors are benign. In the presence of a parotid mass, a physical examination is the first diagnostic tool and, in most cases, it guides the clinician in the appropriate direction. A fine needle aspiration biopsy (FNA) has been indicated by several authors for the diagnostic work-up. Ultrasonography, computed tomography, and/ or magnetic resonance imaging are useful complementary studies for proper surgical planning. Objective: Study clinical, paraclinical features of parotid gland tumor surgery. Materials and Methods: 31 patients with parotid gland tumor who were examined at Hue University of Medicine and Pharmacy Hospital from June 2019 to June 2020 were recorded about clinical, paraclinical of tumour. Results: Parotid salivary gland tumors in men account for 54.8, the mean age of patients was 53.7±12.3. Majority of the parotid gland tumor size in ultrasound were between 2 and 4 cm (67.7%), homogenous (67.7%). Majority of the parotid gland tumor size in CT scanner encountered were between 2 and 4 cm (67.7%), homogenous (61.3%) and in the superficial lobe (96.8). Preoperative fine needle aspiration biopsy (FNA) results showed 35.5% pleomorphic adenoma. Conclusion: FNA - Fine Needle Aspiration, Ultrasound and CT scanner were very valuable for diagnosis. Key words: salivary gland neoplasms, tumors

Background: Salivary gland tumors are the most complex and diverse of any organ in the body. Surgery is the mainstay of treatment for salivary gland tumor. Assessing the results of parotid gland tumor treatment is the aim of the study. Objective: To evaluate the results of parotid gland tumor surgery. Materials and Methods: 31 patients with parotid gland tumor who were examined at Hue University of Medicine and Pharmacy Hospital from June 2019 to June 2020 were recorded about clinical, paraclinical and evaluated results at 1 week, 1 month and 3 months after surgery. Results: Histopathological study of parotid salivary gland tumors: pleomorphic adenoma (64.5%), warthin tumour (32.3%), oncocytoma (3.2%). After parotid surgery, cervicofacial branches being the most commonly affected (29%). The most common complication was numbness around the earlope (77.4%), facial paralysis (41.9%), hemorrhage (29.1%), seroma (3.2%) and salivary fistula (3.2%). Conclusion: After performing parotid surgery, facial nerve injury was temporary Key words: Parotid gland, parotidectomy, facial paralysis

Background: Pleomorphic adenoma, accounting for 80% of all parotid benign tumors and associated with a high recurrence rate after surgery. Early diagnosis and effective treatment will contribute to reducing complications of surgery. Objective: Evaluation of surgical results of pleomorphic adenoma on facial paralysis and other complications. Materials and Methods: including 25 patients with pleomorphic adenoma who were operated at Hue University of Medicine and Pharmacy from January 2020 to December 2020 and evaluate complications after 1 week, 1 month, 3 months, and 6 months. Results: After surgery at 1 week, 1 month, 3 months, and 6 months, the rate of facial paralysis gradually decreased by 76%, 52%, 32%, 0%, respectively. After 6 months, 100% reaching grade I on the House-Brackmann scale. cervicofacial branches accounted for the highest rate (48%). Other common complications include numbness around the ear, hemorrhage, sialocele, salivary fistula. Nevertheless, no cases of tumor recurrence and Frey’s syndrome were recorded. Conclusion: Parotidectomy is an effective and safe treatment method of pleomorphic adenoma. Facial paralysis accounts for a high incidence, but it will fully recover after 6 months. Choosing the appropriate treatment method helps to minimize complications and recurrence after surgery for pleomorphic adenoma of the parotid gland. Key words: Pleomorphic Adenoma, Parotidectomy, Facial paralysis