• Maxillofacial Plastic and Reconstructive Surgery
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• 제31권1호
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• pp.71-76
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• 2009

Benign myoepithelioma (BME) and malignant myoepithelioma (MME) of the salivary gland are very rare and its biologic behavior has not been clarified fully. Although, cases reports for BME and MME were increased in recent, their diagnostic criteria were not completely established. We describe herein a case of BME of the parotid gland and a case of MME of the palatal minor gland, respectively. Histologically, multinodular growth pattern, infiltration to adjacent tissues, and hyalinized and myxoid matrix were observed in MME, that were different histologic features compared with BME. Strong immunoreactivities for the S-100 protein and vimentin were detected in the tumor cells of BME and MME. In specimen of MME, moderately expressed p53 and strongly expressed p63 were detected. However, in specimen of BME, p53 was negatively and p63 was weakly expressed, respectively. In conclusion, the expression patterns of p53 and p63 as well as histologic aggressiveness might be used to diagnose the MME.

• 대한두개안면성형외과학회지
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• 제20권5호
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• pp.336-340
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• 2019

Myoepithelioma was recognized as a histological distinct entity by the World Health Organization (WHO) in 1991. Myoepithelial cells are believed to be of ectodermal origin. In salivary glands, the myoepithelial cells that surround the intercalated ducts are spindled, which is in contrast to the large stellate ones that envelop the acini. Myoepithelioma is a benign salivary gland tumor that consists entirely of myoepithelial cells. A 53-year-old man presented with a 1-year history of a painless mass originating from the right parotid gland. The mass grew rapidly reaching a size of approximately 6 cm. The patient had no facial paralysis. The authors performed right parotidectomy. Immunohistochemistry study of this tumor showed that it was positive for vimentin, positive for S-100, focally positive for pancytokeratin, and focally positive for p63 and that it had a Ki-67 labeling index (below 10%). Additionally, the tumor was negative for epithelial membrane antigen, negative for actin, negative for desmin, negative for CD34 and negative for anaplastic lymphoma kinase. The authors present a case of benign spindle cell myoepithelioma of the parotid gland in a 53-year-old man diagnosed after immunohistochemistry study, describing its importance, along with a brief review of the literature.

• 대한두경부종양학회지
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• 제36권2호
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• pp.65-68
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• 2020

Myoepithelioma is a rare benign neoplasm that mostly arises in the major salivary glands and sometimes in the minor salivary glands, which account only for less than 1% of all salivary glands neoplasms. However, its extra-salivary involvement is even rarer and only a few cases of nasal cavity myoepithelioma were reported in the English-language literature so far. In this case report, we present a 40-year-old female with unilateral nasal obstruction diagnosed as myoepithelioma of the nasal septum and treated with endoscopic sinus surgery.

• Journal of Chest Surgery
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• 제31권2호
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• pp.194-197
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• 1998

근상피종은 방추형, 형질세포양, 상피세포양, 투명세포들의 다양한 비율로 구성되는 양성종양으로 기관내 발생빈도가 극히 희귀하여 현재까지 전세계적으로 1례가 보고 되었으며 국내에서는 아직 보고례가 없었다. 본 증례는 우측 경부 종괴를 주소로 내원한 38세 여자 환자로 갑상선 종양및 기관종괴 진단하에 절제문합술을 시행하였다. 절제된 종괴는 주위와 잘 경계지워지는 충실성 조직으로 이루워져 있으며 주로 방추형 혹은 상피양 세포로 구성되고 간간히 세포질의 투명변성이 보였다. 이들 세포는 S-100 단백과 평활근 액틴에 양성이었고 전자현미경 검색상 세포질내에 다량의 소섬유와 기저막 물질이 세포질외에서 관찰되어 양성 근상피종에 합당한 소견을 보였다. 환자는 술후 8개월째 합병증없이 정상생활을 영위하고 있다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권1호
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• pp.115-119
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• 1996

Myoepithelioma is composed exclusively of myoepithelial cells. Myoepithelial cells are ectodermally derived contractile cells that can be routinely identified in many normal tissues having secretory function such as major and minor salivary glands, lacrimal gland and sweat gland. Tumors composed exclusively of myoepithelial cells, so-called myoepitheliomas, are rare-less than 1% of all salivary gland tumors. Grossly, these tumors are well demarcated. The external surface is smooth and may be bosselated. The cut surface is white and homogenous. Microscopically, these tumors are surrounded by a thin fibrous capsule. They are composed of benign-appearing spindle- shaped and/or polygonal cells. Mitoses are rare. Frequently these tumors contain myxomatous stroma which is susceptible to alcial blue stain. Clinically, myoepitheliomas present as slow-glowing, painless masses and can not distinguished from pleomorphic adenomas. Treatment is the same as for pleomorphic adenoma, and the surgical excision should include a margin of normal tissue. Although the majority of myoepitheliomas have behaved in a beingn manner, pleomorphism and mitotic activity have been associated with local aggressiveness.

• 대한세포병리학회지
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• 제4권2호
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• pp.111-120
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• 1993

Fine needle aspiration cytology has become a frequently used technique for the diagnosis of lesions in the head and neck. Fine needle aspiration cytology of the salivary glands were performed on 66 patients. In 59 patients with satisfactory samples, cytologic diagnoses were as follows; there were 47 benign lesions, including pleomorphic adenoma(20), Warthin's tumor(3), benign cystic lesion(4), Inflammatory lesion(4), lymphoid lesion(3), myoepithelioma(1), unspecified benign neoplasm (5), and unclassified benign lesion(7). There were 6 cases of undetermined malignancy and 6 malignant lesions including mucoepidermoid carcinoma(3), adenoid cystic carcinoma(1), carcinoma ex pleomorphic adenoma(1), and metastatic carcinoma(1) in cytologic diagnosis. In 25 patients, the cytologic diagnosis was correlated with histologic findings. The sensitivity of the benign lesion was 96% and the specificity was 82%. There was no false-positive diagnosis. The sensitivity and the specificity of pleomorphic adenoma were 75% and 95%, respectively. Some of Warthin's tumors were confused with benign cystic lesion due to frequent cystic change of the tumor. The sensitivity and specificity of the malignant lesions were 56% and 88%, respectively. There were three false negative diagnoses. Two mucoepidermoid carcinomas were correctly diagnosed by cytology. Two of three adenoid cystic carcinomas were misdiagnosed as benign tumors.

• 대한두경부종양학회지
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• 제18권1호
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• pp.56-59
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• 2002

Background and Objective: Even though major salivary gland tumor is a rare disease, the diversity of histopathologic characteristics makes treatment decisions difficult. The aim of this study is to analysis the clinical experience of our major salivary gland tumor and to suggest a guideline of treatment. Materials and Method: Sixty-eight major salivary gland tumors and tumor-like glandular enlargements treated at Sanggye Paik Hospital during the past seven years between June, 1995 and January, 2002 are analyzed for histopathologic diagnosis, treatment modality, clinical manifestation, local control, and treatment-related morbidity, recurrence rate, retrospectively. Results: In twenty-eight patients the swellings were diagnosed as non-tumorous condition. The clinical features, diagnostic and surgical management of fourty salivary neoplasms involving the parotid and submandibular glands are correlated with their histological features. Conclusion: We have concluded that salivary gland neoplasms are needed multimodal treatment, because of their highly variable biologic behavior in each tumor type. Thirty-four cases were benign and six cases were malignant. Most of benign cases were pleomorphic adenoma and they showed wide age-distribution. In six malignant cases, there were acinic cell carcinoma, adenocarcinoma, carcinoma ex-plemorphic adenoma, myoepithelioma, and adenoid cystic carcinoma.

• Archives of Plastic Surgery
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• 제39권2호
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• pp.158-161
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• 2012

Myopericytoma is a benign tumor that is composed of myoid-appearing oval to spindle-shaped cells with a concentric perivascular pattern of growth. The tumor is morphologically heterogeneous and can exhibit a broad histologic spectrum. We describe a case of multiple myopericytoma occurring in the head and neck skin region with involvement of the parotid gland where it is known to occur very rarely. A 40-year-old woman noticed multiple enlarging, painless, round-shaped masses on her left cheek. The patient had experienced a similar lesion of the same area 8 years earlier which was completely excised and the pathological diagnosis was spindle cell type myoepithelioma. On a computed tomographic image, one mass involved the superficial parotid gland and was well encapsulated. Excision of the facial masses and superficial parotidectomy with facial nerve preservation were performed. A diagnosis of myopericytoma was established in light of the immunohistochemical pattern with the histopathological findings. Over the 4-year follow-up period, there was no evidence of recurrence. As many perivascular myoid neoplasms share common morphologic features with myopericytoma, we should consider the differential diagnosis, and confirm the histological findings with appropriate immunohistochemical staining. After identifying myopericytoma, it should be treated with wide surgical excision to prevent local recurrence.

• 치위생과학회지
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• 제8권3호
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• pp.207-214
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• 2008

본 연구는 구강내 발생하는 소타액선 종양의 발생 빈도와 조직병리학적 특성에 대한 후향적 연구로서 한국인에서 나타나는 소타액선 종양의 특성을 연구하고자 1990년부터 2006년 8월까지 연세대학교 치과대학 부속병원 구강악안면외과, 연세대학교 의과대학 부속 영동 세브란스병원, 순천향대학교 부속 부천병원에 내원한 200명의 소타액선 종양 환자를 대상으로 치과 및 의과 임상 기록지 검토와 H/E 슬라이드를 재검토하여 다음과 같은 결론을 얻었다. 1. 200명의 환자 중 양성 종양은 123예(61.5%), 악성종양은 77예(38.5%)였으며 남성에서는 87예, 여성에서는 113예였다. 2. 가장 흔하게 발생한 소타액선 종양은 다형성 선종이며 선양 낭성 암종, 점액표피암종, 와틴씨 종양, 선암종과 다형성 선종에서 발생한 악성 종양, 림프관종 등의 순이었다. 3. 호발 부위는 경구개(42.5%), 연구개(9%), 협점막(6%), 입술(3.5%) 부위였다. 4. 발생 연령은 4세부터 70세까지 다양하게 분포하였으며 50대에서 가장 많았다. 양성 종양의 발생 평균 연령은 46.2세였으며 악성 종양의 발생 평균 연령이 56.1세였다. 5. 다형성 선종은 가장 호발한 소타액선 종양으로서 모두 104예였으며 남성 38명, 여성 66명에서 발생하였다. 평균 발생 연령은 46.7세였으며 구개 부위에서 가장 많이 발생하였다. 조직학적 소견은 관 구조 형성, 별 모양, 다각형, 방추형, 형질세포양(plasmacytoid), 연골양, 점액양 구조를 보였으며 불완전한 피막과 종양 피막을 뚫고 다발성으로 발생하는 소견이 관찰되었다. 6. 선양 낭성 암종은 가장 호발한 악성 타액선 종양으로 모두 32예였으며 남성 16명, 여성 16명에서 발생하였다. 평균 발생 연령은 57.4세였으며 경구개 부위에서 가장 많이 발생하였다. 조직학적 소견은 cribriform pattern, 관상 구조, 판상 구조 형성, 종양 세포의 신경 주위 침습 등을 보였다. 7. 점액표피암종은 모두 25예였으며 남성 10명, 여성 15명에서 발생하였다. 평균 발생 연령은 50.0세였으며 경구개 부위에서 가장 많이 발생하였다. 조직학적 소견은 점액 세포, epidermoid-type 세포, intermediate cell의 분포가 대부분 저등급을 보였다. 이외에도 와틴씨 종양, 선암종과 다형성 선종에서 발생한 악성종양, 림프관종 등이 발생하였다. 8. 한국인의 소타액선 종양의 발생 빈도는 양성 종양이 높으며 특히 다형성 선종이 많았고 여성 발생, 구개 부위 발생이 많았으며 다형성 저등급 선암종 등 특정 소타액선 종양의 발생이 극히 적었다.

• 생명과학회지
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• 제18권1호
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• pp.16-22
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• 2008

개에서의 유선 종양진단은 총 49 case 중에서 Human epidermal growth factor receptor (HER-2/neu, c-erbB-2), Epidermal growth factor receptor (EGFR), Activated leukocyte cell adhesion molecule (ALCAM) 등 면역조직화학적염색법을 실시하였다. 우선 49 case를 두 그룹으로 즉: 양성종양그룹 (22 case)과 악성종양그룹 (27 case)으로 구분하였다. 면역조직화학적염색법의 분석결과 HER-2/neu의 발현은 양성종양에서는 31.8% (7/22), 악성종양에서는 29.6% (8/27)의 발현율을 보였고, EGFR의 발현은 양성종양에서는 27.3% (6/22), 악성종양에서는 22.2% (6/27)의 발현율을 보였으며, ALCAM의 발현은 양성종양에서는 40.9% (9/22), 악성종양에서는 7.4% (2/27)의 발현율을 보였다. 결론적으로 개에서의 유선종양진단의 발현율은 사람에서 보고된 것($25%{\sim}30%$)과 비슷하게 나타났으며 임상진단분야에서 HER-2/neu항체로 개에서의 유선종양진단에서 유용한 평가수단으로 적용될 수 있으리라 사료된다.