A case of mandibular ameloblastoma with papillomatous proliferations in the gingiva

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  • YASUI Takazumi
    Kawasaki Municipal Hospital, Dentistry and Oral Surgery
  • ONIZAWA Katsuhiro
    Kawasaki Municipal Hospital, Dentistry and Oral Surgery
  • TANAKA Yoichi
    Division of Surgical Pathology Clinical Laboratory Tokyo Dental College Ichikawa General Hospital
  • HYODO Tomoko
    Kawasaki Municipal Hospital, Dentistry and Oral Surgery
  • KODAKA Rie
    Department of Dentistry and Oral Surgery School of Medicine, Keio University
  • IWASAKI Ryotaro
    Department of Dentistry and Oral Surgery School of Medicine, Keio University

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Other Title
  • 歯肉に乳頭腫状増殖を呈した下顎骨エナメル上皮腫の1例
  • シニク ニ ニュウトウシュジョウ ゾウショク オ テイシタ カガクコツ エナメル ジョウヒ シュ ノ 1レイ

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Abstract

Although ameloblastoma is a relatively common jaw tumor, it is rare for an intraosseous ameloblastoma to extend into the covering mucosa and thereby induce papillomatous changes. We report our experience with a 33-year-old man who had a mandibular ameloblastoma with papillomatous proliferations in the gingiva. The gingival mass had a papillary surface and extended across the right mandibular lingual gingiva from the canine region to the first premolar region. A diagnostic biopsy at initial examination revealed ameloblastoma. Marginal resection of the mandible and free iliac bone grafting were performed. Histopathological examination revealed that most of the tumor, a follicular ameloblastoma with papillomatous proliferations in the gingival epithelium, was in the jaw bone. As of 18 months since treatment, the patient remaines well without recurrence.

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