• Radiation Oncology Journal
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• v.4 no.1
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• pp.21-27
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• 1986

From 1970 to 1982, thirty one patients with malignant tumors of the parotid gland were treated with radiation therapy at department of Radiation Oncology, Yonsei University College of Medicine, Yonsei Cancer Center. Indication for radiotherapy were as follows: 1) when there were microscopic or gross residual diseases (6 patients), 2) when the patients considered to have high risk factors (15 patients), 3) when the tumor found to be inoperable (6 patients), 4) when there was recurrence after surgery (4 patients). Most patients were treated with a total of 5,000 to 6,500cGy in 5 to 6 weeks except when there were gross diseases, in which patients received slightly higher dose up to 7,000 cGy in 7 weeks. Locoregional failure rate was $43\%$ in patients with microscopic or gross residual disease and high risk factors (postoperative radiotherapy group) and 20 in patients with inoperable tumor and recurrence after surgery (Primary radiotherapy group). There was no difference in the failure rates amen!1 the various histological types. Eight patients failed distantly, Severe complications appeared only in 2 patients irradiated for inoperable advanced diseases.

• Journal of the Korean Society of Radiology
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• v.82 no.1
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• pp.152-161
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• 2021

Purpose To evaluate the incidence and condition of platysma infiltration in benign tumors, malignant tumors, and inflammatory disease in the parotid gland using CT or MRI. Materials and Methods Patients with benign tumors (n = 314), malignant tumors (n = 52), and inflammatory disease (n = 22) in the parotid gland were included. The incidence of platysma infiltration and the relationship between platysma infiltration and the location, capsular involvement, and focality of the mass were retrospectively evaluated using CT or MRI. Results The incidence of platysma infiltration was 0% in benign tumors,19.2% in malignant tumors (10/52), and 50.0% in inflammation (11/22). Platysma infiltration was positive in 10 of 13 patients with inflammatory lesion with capsular involvement. Platysmal infiltrations in inflammatory lesion showed diffuse lesion in 10 patients and focal lesion in one patient. Malignant tumor with platysmal infiltration showed all capsular involvement, and diffuse lesion in seven and focal lesion in three. Conclusion Platysma infiltration was more common in patients with inflammatory disease than those with malignant tumors or benign tumors. In inflammatory disease, platysma infiltration was more common in patients with capsular involvement or diffuse lesion.

• Korean Journal of Bronchoesophagology
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• v.3 no.2
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• pp.277-286
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• 1997

We have reviewed a 9-year experience with 47 patients treated for salivary tumors which arose In the parotid gland (23 patients; 48.9%), submandibular gland (15 Patients, 31.9%), minor salivary gland (8 patients; 17.0%), and sublingual gland (1 patient; 2.1%). The age of patients ranged from 12 to 71 with a mean of 42.9 years. The male to female ratio showed a female preponderance, 19:28 (1:1.5). An asymptomatic mass (91.5%) was most common presentation. With fine-needle aspiration, the predictive value of a neoplasm was 88.9%. Histopathologically, the most common salivary gland tumors was Pleomorphic adenoma(57.4%). The pleomorphic adenoma was most common in benign tumor group, and the mucoepidermoid carcinoma was most common in malignant tumor group. Of the salivary gland tumors, the incidence of cervical metastasis was 22.2%. Major postoperative complications were facial nerve paralysis and wound infection.

• Korean Journal of Head & Neck Oncology
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• v.19 no.1
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• pp.67-70
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• 2003

Out of entire salivary tumor, 1.7% are malignant lymphoma developed in salivary gland and it is usually mucosa associated lymphoid tissue (MALT) lymphoma developed in salivary gland. In the case of Non-Hodgkin lymphoma, the most frequently involved extanodal sites of diffuse large B cell lymphoma are bone, skin, thyroid, gastrointestinal tract, and lung. Development in salivary gland is very rare. A 69 years old male patient who have found Lt. submandibular gland (SMG) mass a month ago is suspected of malignancy from his FNA result, so histologic exam by SMG resection was operated. According to histopathologic exam, large B cell lymphocyte infiltratration were generally shown as diffuse and lymphoepitheliallesion were not found. In immunostaining, CD79a showed positive and CD3, CAM5.2 showed negative which diagnosed as diffuse large B cell lymphoma. As Ann Arbor stage I, CEOP-B chemotherapy was used 3 times as treatment without any recurrence. In the case of malignant lymphoma in salivary gland, it develops as painless mass in ipsilateral side. If found in parotid gland, it is rare to have facial nerve falsy and pathologically diagnosed as lymphocytes of abnormal type of monoclonal immunostaining must be provided as evidence. Combined therapy is known as most effective treatment for intermediate grade.

• The Korean Journal of Cytopathology
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• v.8 no.2
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• pp.135-142
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• 1997

Mucoepidermoid carcinoma is the most common malignant neoplasm of the salivary gland, compring between 30 and 40%. Fine needle apsiration cytology was performed in five patients with mucoepidermoid carcinoma. The patients consisted of three males aged of 42, 48, and 60 years, and two females aged 36, and 56 years. The primary tumor sites were the parotid gland in four patients and the submandibular gland in the rest one. The histologic grades were low in one patient, intermediate in two patients and high in other two. In our experience, the common cytologic findings of low grade subtype were predominent mucous cells with some intermediate cells in an abundant mucinous background. The cytologic findings of intermediate grade subtype were predominant clusters of intermediate cells with or without mucous cells in an abundant mucinous background. And the cytologic findings of high grade subtype were predominant clusters of epidermoid cells with intermediate cells in a bloody background. Cytologic pleomorphism and atypia were more severe in high grade than low and intermediate grade, and nucleoli were more frequently noted in epidermoid cells. In low grade, it is very difficult to decide the benignancy or malignancy of the tumor. In fact, the presence of mucous cells in a mucinous background should rule out any other type of well differentiated carcinoma.

• Journal of Oral Medicine and Pain
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• v.38 no.4
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• pp.291-298
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• 2013

On this study, we treated rats with restraint stress, and observed the changes with an optical microscope. Within the salivary gland tissue, we measured cell apoptosis cycle evaluation which show positive reaction on TUNEL assay, and compared within the groups. For this study, 18 rats were divided into 3 groups; 1) 2 rats of group I were selected as a normal control. 2) 2 rats of group II, as a experimental control were placed in the restraint cone for 2 hours 3) 14 rats of group III were placed in the restraint cone for 2 hours once a day. The rats were sacrificed immediately (group II, as a experimental control), 1, 2, 3, 4, 5, 6 and 7days after application of the stress and the both parotid glands were excised. The conclusions follow. 1. 5 days after giving an confining stress to the parotid gland of Rats, we can observe the hypotropy and pus and inflammation of Rat parotid gland acinar cells, and after 7 days, we can see a cell apoptosis. 2. Through the In situ DNA end labeling assay and TUNEL dye, on serous glands, benign tumor cell increased with statistically significant result after 5 days from confining stress. And the index shows maximum value on 7th days, which is same result with histological opinion. Therefore, our study shows that a cell apoptosis can be induced by restraint stress on salivary gland tissue, and we think more study should be accomplished about the cell signaling pathway in the future.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.22 no.2
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• pp.233-237
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• 2000

Pleomorphic adenoma is the most common of all salivary gland tumors, constituting over 50 per cent of all cases of tumors, and approximately 90 per cent of all benign salivary gland tumors. Since the term mixed tumor' was introduced by Broca for its dual origin of epithelial and mesenchymal elements, the term plemorphic adenoma suggested by Willis characterizes closely the unusual histologic pattern of the lesion. The parotid gland is the most common site but it may occur in any of the salivary glands. It is somewhat more frequent in women and in the fourth to sixth decades, but they are also relatively common in young adult and have been known to occur in children. Treatment of choice is surgical excision. Adequate surgery with safe margin reduce its recurrence rate. We represent a case of pleomorphic adenoma with literature review in 65-year old male occured in the palate. The lesion was successfully treated by surgical excision.

• Radiation Oncology Journal
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• v.23 no.3
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• pp.131-136
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• 2005

Purpose: The aim of this study was to evaluate the clinical results of postoperative radiotherapy for parotid gland malignancy, and determine prognostic factors for locoregional control and survival. Materials and Methods: Between 1980 and 2002, 130 patients with parotid malignancy were registered In the database of the Department of Radiation Oncology, Seoul National University Hospital. The subjects of this analysis were the 72 of these 130 patients who underwent postoperative Irradiation, There were 42 males and 30 females, with a median age of 46.5 years. The most common histological type was a mucoepidermoid carcinoma. There were 6, 23, 23 and 20 patients in Stages I, II, III and IV, respectively. The median dose to the tumor bed was 60 Gy, with a median fraction size of 1.8 Gy. Results: The overall 5 and 10 year survival rates were 85 and $76\%$, respectively, The five-year locoregional control rate was $85\%$, which reached a plateau phase after 6 years. Sex and histological type were found to be statistically significant for overall survival from a multivariate analysis. No other factors, Including age, facial nerve palsy and stage, were related to overall survival. For locoregional control, nodal involvement and positive resection margin were associated with poor local control. Histological type, tumor size, perineural invasion and type of surgery were not significant for locoregional control. Conclusion: A high survival rate of parotid gland malignancies, with surgery and postoperative radiotherapy, was confirmed. Sex and histological type were significant prognostic factors for overall survival. Nodal Involvement and a positive resection margin were associated with poor locoregional control.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.19
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• pp.8259-8263
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• 2014

Aims: To determine the clinical characteristics, pathological features, local and distant failure patterns in patients with carcinoma of major salivary glands treated with surgery and postoperative radiotherapy (PORT). Materials and Methods: We retrospectively reviewed 106 cases of major salivary gland tumor seen at our centre (1998-2008). Sixty five cases of major salivary gland carcinoma were selected for analysis (exclusions: benign, palliative, non-carcinomas). The patient population treated by surgery and PORT was divided into two groups: 1) Patients who underwent surgery and immediate PORT (Primary PORT); 2) Patients with recurrent carcinoma who underwent at least two surgeries and received PORT in the immediate post-operative period of the last performed surgery (Recurrent PORT). Recurrence free survival (RFS) was assessed using the Kaplan-Meier method. Results: Median age was 35 years with a male: female ratio of 1.3:1. The majority of cancers were located in the parotid gland (86.2%) and the most common histology was mucoepidermoid carcinoma (43%). Thirty nine cases (60%) were primary while 26 (40%) were recurrent. Optimal surgery was performed in 59/65 patients (90.8%). 43 patients (66.2%) underwent neck dissection, of which 14 (32.5%) had nodal metastasis. Overall, 61 (93.8%) patients complied with the prescribed radiotherapy. Median dose of PORT was 60 Gy. Median follow-up was 13.1 months (range 2-70). Relapse free survival was 50.4% at 60 months. Some 12 cases (18.5%) recurred with a median time to recurrence of 16.9 months. Conclusions: Surgery and PORT is an effective treatment for major salivary gland carcinoma with over 90% compliance and <20% recurrence. Early treatment with postoperative radiotherapy may increase the survival rate in major salivary gland carcinoma patients.

• Archives of Craniofacial Surgery
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• v.20 no.1
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• pp.71-74
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• 2019

Schwannoma is a benign tumor rarely found in the head and neck and much less commonly found in the intraparotid facial nerve. It is a slow-growing encapsulated tumor originating from the Schwann cells or axonal nerve sheath. It can occur anywhere along the course of the facial nerve. Patients may present with symptoms of facial palsy, but the most common presenting symptom is an asymptomatic swelling. Diagnosis is usually difficult before surgical removal and histopathological examination. We report a rare case of intraparotid facial nerve schwannoma in a 57-year-old female who had sustained a mass of the right preauricular area for 3 years. She reported no pain or facial muscle weakness. Enhanced computed tomography findings revealed the impression of pleomorphic adenoma. However, intraoperative gross findings were not characteristic of pleomorphic adenoma, and a frozen biopsy was performed resulting in the impression of a nerve sheath tumor. We performed an extracapsular surgical excision without parotidectomy. Permanent histopathology and immunohistochemistry reports diagnosed the mass as schwannoma. There were no complications including facial palsy after surgery. No recurrence was found at 6 months after surgery.