A Histopathological and Immunohistochemical Study of Necrotizing Sialometaplasia
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概要
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Necrotizing sialometaplasia (NSM), a benign tumor-like lesion of the salivary glands, often resembles a malignant tumor in terms of clinical and histopathological features. In general pathology, metaplasia results from a kind of progressive change after chronic abnormal stimuli, and NSMis thought to arise after ischemic necrosis. However, the nature and pathogenesis of NSMremain unclear. The purpose of the present study was to investigate the morphological characteristics of metaplastic change in NSMby histopathological and immunohistochemical analyses using primary antibodies for cytokeratins (CKs) and MIB1.Positive immunohistochemical reactivities for CK13 and MIB-1 staining in the squamous metaplasia of NSMwere observed. Positive reactivity for CK13 was observed in prickle cells of the stratified squamous epithelium. The mean MIB-1 index was 6.0%. These results suggest that duct epithelial cells are responsible for metaplasia in NSM, because ducts in the palatal glands showed stratified squamous-like epithelium near areas of NSMand immunohistochemical findings resembled either salivary glands or oral mucosae covered with the lesion.
著者
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Utsunomiya Tadahiko
Department Of Oral Pathology Nihon University School Of Dentistry At Matsudo
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Yamamoto Hirotsugu
Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, 2-1, Minamijosanjima-cho, Tokushima 770-8506, Japan
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Yamamoto Hiroshi
Nihon University Graduate School of Dentistry at Matsudo, Oral Pathology, Matsudo, Chiba, 271-8587. Japan
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Yamamoto Hirotsugu
Department of Oral Pathology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, 271-8587. Japan
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