Cytological study of 18 cases of salivary gland mucoepidermoid carcinoma

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  • KAMEYAMA Yukako
    Department of Pathology, Nihon University School of Dentistry at Matsudo Department of Clinical Laboratory Pathology, Eiju General Hospital
  • KATO Taku
    Division of Pathology, Naritatomisato Tokushukai Hospital
  • MATSUMOTO Takashi
    Department of Pathological Diagnosis, Nihon University Hospital at Matsudo
  • UKIGAYA Masayuki
    Department of Pathological Diagnosis, Nihon University Hospital at Matsudo
  • YAMAMOTO Hiroshi
    Department of Oral Surgery, Nihon University School of Dentistry at Matsudo
  • NAKAMURA Masayuki
    Department of Oral Pathology, Nihon University Graduate School of Dentistry at Matsudo
  • SUEMITSU Masaaki
    Department of Pathology, Nihon University School of Dentistry at Matsudo Department of Pathological Diagnosis, Nihon University Hospital at Matsudo
  • KUYAMA Kayo
    Department of Pathology, Nihon University School of Dentistry at Matsudo Department of Pathological Diagnosis, Nihon University Hospital at Matsudo

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Other Title
  • 唾液腺粘表皮癌 18 例の細胞学的検討
  • ―Histopathological grades and Milan system classification―
  • ―組織学的悪性度とミラノシステム診断カテゴリーとの相関について―

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Abstract

<p>Objective : Mucoepidermoid carcinoma is the most common type of malignant salivary gland tumor, and its cell morphology differs depending on the histopathological grade, making cytodiagnosis difficult. We analyzed the cell morphologies in the cytological specimens reported according to the Milan system in relation to the malignant grade, and examined its usefulness.</p><p>Study Design : From 1983 to 2019, there were 18 patients who had been histopathologically diagnosed as having mucoepidermoid carcinoma by FNA cytology or intraoperative imprint cytology.</p><p>Results : The average age of the patients was 43.4 years, but it increased as the malignancy grade of the tumor increased from low to intermediate to high (39.2, 46.3, and 63.5 years, respectively). Of the 18 patients, 11 cases were diagnosed as having mucoepidermoid carcinoma, and 3 cases as suspicious, and in all the cases, the characteristic findings of mucous-producing cells scattered in intermediate cell clusters were observed. In regard to the Milan system classification in relation to the histopathological grades, high-grade cases were classified as “high-malignancy”, intermediate-grade cases as “malignant” or “SUMP”, and low-grade cases as “low-malignancy”, “malignant”, “suspicious for malignancy” or “AUS”.</p><p>Conclusion : Cytological findings of mucoepidermoid carcinoma were reported according to the Milan system, which helped to determine the histopathological grade.</p>

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