Leukemic cell kinetics of APL with a novel complex variant t (12;17;15)(p13;q21;q22)

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  • SAIKI Yusuke
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • SAKAI Hirotaka
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • UCHIDA Akiko
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • UEMURA Yu
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • MATSUNAWA Manabu
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • ISOBE Yasushi
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • KATO Masayuki
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • TOMITA Naoto
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine
  • MIURA Ikuo
    Center for Genetic and Chromosomal Analysis, SRL, Inc.
  • ARAI Ayako
    Department of Internal Medicine, Division of Hematology and Oncology, St. Marianna University School of Medicine

Bibliographic Information

Other Title
  • 新規複雑変異転座t(12;17;15)(p13;q21;q22)を持つ急性前骨髄球性白血病の白血病細胞動態
  • 症例報告 第10回日本血液学会関東甲信越地方会 奨励賞 新規複雑変異転座t(12;17;15)(p13;q21;q22)を持つ急性前骨髄球性白血病の白血病細胞動態
  • ショウレイ ホウコク ダイ10カイ ニホン ケツエキ ガッカイ カントウ コウシンエツチホウカイ ショウレイショウ シンキ フクザツ ヘンイテンザt(12;17;15)(p13;q21;q22)オ モツ キュウセイ ゼン コツズイキュウセイ ハッケツビョウ ノ ハッケツビョウ サイボウ ドウタイ

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Abstract

<p>A 69-year-old woman with leukocytopenia and thrombocytopenia was referred to our hospital. Her bone marrow comprised 70.5% abnormal promyelocytes that were positive for myeloperoxidase/CD33/CD117 and CD13 (dim) and negative for CD2/CD34/CD56 and HLA-DR. Chromosome analysis of the bone marrow showed t (12;17;15) (p13;q21;q22), and fluorescence in situ hybridization revealed the PML-RARA fusion signal only on the derivative chromosome 15. The patient was diagnosed with acute promyelocytic leukemia (APL) with PML-RARA and was treated using all-trans retinoic acid (ATRA). In peripheral blood (PB), PML-RARA-positive polymorphonuclear cells (PMNs) appeared on the second week and became negative on the sixth week after treatment, whereas PML-RARA-negative PMNs started to increase in number on the sixth week. Molecular remission was confirmed on the 10th week. Quantitative evaluation of the differentiated leukemic cells of APL and recovered cells from normal hematopoiesis in PB can provide useful information for a safer induction therapy. No significant difference was noted in the kinetics of the leukemic cells under ATRA treatment as well as in the clinical features between our patient without RARA-PML and those with t (15;17), which is a cytogenetic evidence for the critical role of PML-RARA in the pathogenesis of APL.</p>

Journal

  • Rinsho Ketsueki

    Rinsho Ketsueki 61 (2), 103-109, 2020

    The Japanese Society of Hematology

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