A case of extraosseous/peripheral ameloblastoma with basal cell type

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  • TAKEI Shingo
    Department of Oral Maxillofacial Surgery, Shizuoka General Hospital
  • OGINO Akihiko
    Department of Oral Maxillofacial Surgery, Shizuoka General Hospital
  • KUSAFUKA Kimihide
    Department of Pathology, Shizuoka General Hospital
  • FUKUTA Kota
    Department of Oral Maxillofacial Surgery, Shizuoka General Hospital
  • OGUMA Tetsushi
    Department of Oral and Maxillofacial Surgery, Aichi Gakuin University School of Dentistry
  • ADACHI Moriyasu
    Department of Oral Maxillofacial Surgery, Shizuoka General Hospital

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Other Title
  • 基底細胞型の病理組織像を呈した骨外型/周辺型エナメル上皮腫の1例
  • キテイ サイボウガタ ノ ビョウリ ソシキゾウ オ テイシタ ホネ ソトガタ/シュウヘンガタ エナメル ジョウヒ シュ ノ 1レイ

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We report a case of extraosseous/peripheral ameloblastoma with basal cell type. The patient was an 81-year-old man. At his initial visit, a large tumor measuring 15×10 mm in size was observed in the gingiva of his right maxillary node. CT images revealed no bone resorption around the tumor. A biopsy was carried out and, since it was found to be an extraosseous/peripheral ameloblastoma of the basal cell type according to a histopathological diagnosis, tumor resection was carried out under general anesthesia. The tumor was continuous with the gingival epithelium and the follicular proliferation of basal cell-like cells along with high cylindrical epithelium at the margins of the follicular nests were observed. Seven years and four months have elapsed since surgery, and no recurrence has been observed.

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