Clinicopathological study of ameloblastoma: a review of 85 Japanese patients

DOI
  • González-Alva Patricia
    Division of Pathology, Department of Diagnostic and Therapeutic Sciences, Therapeutic Sciences, Meikai University School of Dentistry
  • TANAKA Akio
    Second Division of Oral and Maxillofacial Surgery, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry
  • OKU Yuka
    Second Division of Oral and Maxillofacial Surgery, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry
  • OKAMOTO Eri
    Second Division of Oral and Maxillofacial Surgery, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry
  • MIYAZAKI Yuji
    Division of Pathology, Department of Diagnostic and Therapeutic Sciences, Therapeutic Sciences, Meikai University School of Dentistry
  • YOSHIDA Noriaki
    Division of Pathology, Department of Diagnostic and Therapeutic Sciences, Therapeutic Sciences, Meikai University School of Dentistry
  • KANEKO Tadayoshi
    Department of Oral and Maxillofacial Surgery, Tokyo Medical University
  • TAJIMA Yoshifumi
    Division of Pathology, Department of Diagnostic and Therapeutic Sciences, Therapeutic Sciences, Meikai University School of Dentistry
  • IDE Fumio
    Division of Pathology, Department of Diagnostic and Therapeutic Sciences, Therapeutic Sciences, Meikai University School of Dentistry
  • SAKASHITA Hideaki
    Second Division of Oral and Maxillofacial Surgery, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry
  • KUSAMA Kaoru
    Division of Pathology, Department of Diagnostic and Therapeutic Sciences, Therapeutic Sciences, Meikai University School of Dentistry

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Abstract

良性上皮性の歯原性腫瘍であるエナメル上皮腫は緩慢な発育を示すものの, 局所侵襲性があり, 再発率も高い. 病理組織学的には亜型があり, いくつかの種類に分けられている. さらに悪性歯原性腫瘍の項目のなかにエナメル上皮腫の悪性型も分類されている. 本研究では, 2005年のWHO分類に従い, 明海大学歯学部病態診断治療学講座において過去28年間で取扱った良性型のみのエナメル上皮腫85例について再検討を行った. 組織像を再検討するとともに臨床的にも検討を加えた. 男性は62.3%, 女性は37.7%を占め, 男女比は1.6: 1であった. 年齢は6歳から76歳で, 10歳代にピークがあり, 平均年齢は33.7歳であった. 部位別では下顎に発生する例が多く, その頻度は87.0%であった. 組織学的には充実型/多嚢胞型の叢状型が37.7%と最も多く, 充実型/多嚢胞型の濾胞型は34.2%, 単嚢胞型は21.1%, 骨外型/周辺型は3.6%および類腱型は2.3%であった. その他, まれな例としてadenoid ameloblastoma with dentinoidが1例認められた. エナメル上皮腫は診断された組織型により治療が異なり, 長期にわたるfollow-upを要する.

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