• Journal of Korean Dental Science
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• v.13 no.1
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• pp.21-27
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• 2020

Purpose: The aim of this study was to investigate the types and frequency of the various incidental findings (IFs) on magnetic resonance images (MRI) taken from the patients with temporomandibular disorder (TMD) symptoms. Materials and Methods: Temporomandibular joint (TMJ) MRI taken from 1,013 patients with TMD symptoms were evaluated retrospectively. IF was defined as imaging features that were accidentally or unexpectedly found, rather than degenerative bony changes of TMJ complex or disc derangement. They were classified into two groups as TMJ site-specific findings and unexpected findings at other regions. The frequency of the sub groups was analyzed. Result: A total of 26 (2.57%) cases with IFs were classified into 13 cases with TMJ site-specific findings and 13 cases with unexpected findings at other region. TMJ site-specific findings included synovial chondromatosis in 6 cases, synovial cyst in 6 cases and osteochondroma in one case. Unexpected findings included salivary gland tumor in 3 cases, developmental cyst in 3 cases, vascular malformation in 2 cases, mastoiditis in 4 cases and sialadenitis on parotid gland in one case. Conclusion: When diagnosing TMD through TMJ MRI, clinicians should carefully read the image, considering the possibility of IFs because TMJ MRI can provide pathologic information in TMJ region and other oral and maxillofacial region.

• The Korean Journal of Cytopathology
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• v.9 no.2
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• pp.181-185
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• 1998

Polymorphous low grade adenocarcinoma(PLGA) is a rare malignant tumor of the salivary gland. It is characterized by diverse histology, bland-locking cytology indolent behavior and favorable prognosis. The fine needle aspiration cytologic features of PLGA are described. The aspirates from the hard palate in a 33-year-old woman showed cellular smear composed of monotonous small round to oval cells with scanty cytoplasm. Papillary, tubular and cell ball arrangements with characteristic dense stromal spheres were recognized. PLGA could be suggested by fine needle aspiration cytology, if one encountered cellular smear with various architectures and uniform bland-locking cytologic feature.

• Radiation Oncology Journal
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• v.17 no.3
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• pp.179-187
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• 1999

Brachytherapy has been proved to be an effective method for the purpose of increasing radiation dose to the tumor and reducing the dose to the surrounding normal tissue. In head and neck cancer, the rationale of brachytherapy is as follows; Firstly, early small lesion is radiocurative and the major cause of failure is local recurrence. Seondly, it can diminish evidently the dose to the normal tissue especially masseteric muscle and salivary gland. Thirdly, the anatomy of head and neck is suitable to various technique of brachytherapy. On background of accumulated experience of LDR iridium brachytherapy of head and neck cancer for the last 15 years, the author reviewed the history of radioisotope therapy, the characteristics of radionuclides, and some important things in the method, clinical technique and treatment planning. The author analyzed the clinical result of 185 cases of head and neck cancer treated in the Korea Cancer Center Hospital. Finally the future prospect of brachytherapy of head and neck cancer is discussed.

• Korean Journal of Head & Neck Oncology
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• v.10 no.2
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• pp.157-162
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• 1994

It is the purpose of this paper to determine the relative frequency of the neoplastic vs. non-neoplastic disease in a series of surgically removed parotid and submandibular masses. The study was conducted a retrospective review of 249 consecutive, operated patients' records seen over a 9-year period from 1985 through 1993 at Department of Otolaryngology-Head and Neck Surgery, Korea Cancer Center Hospital. One hundred and fifteen patients had parotid mass and 134 patients had submandibular mass. All the specimen surgically removed were studied histopathologically. The numbers and percentages of patients are reported along with a pathological classification of the lesions encountered: neoplastic(benign, malignant) and non-neoplastic (inflammatory, non-inflammatory). There were 59 benign, 46 malignant, 6 inflammatory, 4 non-inflammatory in 115 parotid mass, and 33 benign, 48 malgnant, 47 inflammatory, 6 non-inflammatory in 134 submandibular mass. One-hundred-eighty-six of entire 249 patients had tumor involvement, for a 74.7% incidence of neoplasia. There was a neoplastic predominance in parotid mass(91.3%) and a relative inflammatory predominance in submandibular mass(35.1%).

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.35 no.3
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• pp.187-192
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• 2009

Out of all oral malignant tumor, malignant lymphoma occurs in only 3.5%. Especially, most of the primary malignant lymphomas, which occur in the head & neck region are high-grade diffuse large B-cell lymphoma and mucosa-associated lymphoid tissue (MALT) marginal zone B-cell lymphoma is very rare. In the head & neck region, malignant lymphoma is reported to occur in the thyroid, salivary gland, trachea, larynx, orbital lobe and the Waldeyer's ring. Among the Waldeyer's ring, palatal tonsil is reported to be the most common region, but, only 1 case report was published in Korea. Until now, there were no case reports of MALT lymphoma that occurred in the tongue. The purpose of this case report is to report and discuss on a case of MALT lymphoma of the tongue.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1978.06a
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• pp.7.3-7
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• 1978

Adenoid cystic carcinoma that is found most frequently in the salivary gland is an extremely rare malignant tumor in middle ear and is a slow growing one with a characteristic tendency of recurrence after surgical removal. Recently we experienced a case of this rare adenoid cystic carcinoma arising from middle ear of 30 year old male patient. The patient complained of hearing impairment for two years duration and pulsating tinnitus for two weeks duration in the right ear. Under the local anesthesia, throgh exploratory tympanotomy, a grayish white mass measuring $1.5\times$1.5$\times$1mm in the hypotympanic portion was removed out and a adenoid cystic carcinoma was verified histopathologically.

• Korean Journal of Head & Neck Oncology
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• v.35 no.1
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• pp.33-36
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• 2019

Mucosa-associated lymphoid tissue (MALT) lymphoma has specific clinical and pathologic features. The most common site MALT lymphomas is the stomach; however, it can also occur in other organs, such as the salivary glands. MALT lymphoma is rare, but its prognosis is good. A 32-year-old man visited Konyang university hospital with parotid mass. Superficial partial parotidectomy was performed to exclude lymphoid neoplasms. IgH gene rearrangement analysis of the surgical specimen led to the diagnosis of MALT lymphoma. The patient underwent esophagogastroduodenoscopy, positron emission tomography-computed tomography, and whole-body bone scan. Regional or distant metastasis was not observed on staging workup. The patient underwent postoperative radiation therapy, there has been no recurrence of MALT lymphoma to date. Here, we report this rare case of parotid MALT lymphoma that was treated with surgery and postoperative radiation therapy.

• Archives of Craniofacial Surgery
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• v.25 no.3
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• pp.150-154
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• 2024

This case report describes a rare occurrence of pyogenic granuloma (PG) in the hard palate deviating from its typical gingival location that led to the formation of an alveolar cleft. The aggressive growth pattern of the lesion, with atypical progression from a pedunculated nodule to an alveolar cleft, raised concern. The diagnosis was based on magnetic resonance imaging and computed tomography findings, which revealed a tadpole-shaped lesion originating from the midline hard palate. The differential diagnosis included a minor salivary gland tumor. Surgical excision was performed under general anesthesia and resulted in a mucosal defect without nasolabial fistula formation or bone exposure. The palatal defect was packed with oxidized regenerated cellulose and closed with Vicryl Rapide sutures, both of which contributed to the patient's successful outcomes. Our comprehensive approach, extending across the stages of surgical planning, execution, and postoperative care, demonstrated the advantages of a multidisciplinary strategy for the accurate diagnosis and effective treatment of palatal PGs. This report makes a meaningful contribution to the existing literature on common oral lesions by emphasizing the importance of a broad differential diagnosis and a systematic approach to oral pathologies. It also raises clinical awareness of PGs with atypical presentations and the diagnostic challenge that they pose.

• Korean Journal of Head & Neck Oncology
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• v.40 no.1
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• pp.15-17
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• 2024

Clear cell carcinoma is a rare variant of salivary gland carcinoma, and its occurrence in the tongue base is even rarer. We present a case of a 55-year-old female patient with clear cell carcinoma of the tongue base. The patient initially presented with a 3-month history of palpable tongue mass, leading to her visit to the otolaryngology outpatient clinic. The patient underwent a complete resection of the tumor under general anesthesia. Postoperative follow-up imaging studies showed no evidence of recurrence. This case report highlights the diagnostic and management challenges associated with clear cell carcinoma of tongue base and demonstrates that a high index of suspicion is required to diagnose clear cell caricnoma, given its rarity and overlapping features with other clear cell neoplasms.

• Journal of the Korean Society of Radiology
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• v.85 no.3
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• pp.643-648
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• 2024

Acinic cell carcinoma is a rare malignant tumor that accounts for 2%-3% of salivary gland tumors. Acinic cell carcinoma arising from the breast is extremely rare, with only approximately 70 cases reported to date. Owing to its rarity, previous studies have primarily focused on pathological findings. Herein, we present the clinical and radiological features of acinic cell carcinoma of the breast in a 33-year-old woman.