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International Journal of Hematology

, Volume 76, Issue 1, pp 80–83 | Cite as

A Case of Acute Myeloid Leukemia with t(7;11)(p15;p15) Mimicking Myeloid Crisis of Chronic Myelogenous Leukemia

  • Keiki Kawakami
  • Setsuko Miyanishi
  • Kazuhiho Nishii
  • Eiji Usui
  • Tetsuya Murata
  • Isaku Shinsato
  • Hiroshi Shiku
Case Report

Abstract

The chromosome aberration t(7;11)(p15;p15) is uncommon but recurrent in leukemia. We experienced a case of acute leukemia with t(7;11)(p15;p15), the hematological appearance of which mimicked myeloid crisis in chronic myeloid leukemia (CML). This case showed splenomegaly, a decreased neutrophil alkaline phosphatase (NAP) score, increased vitamin B12 value, and cells at all stages of neutrophilic maturation in both bone marrow and peripheral blood. We initially had difficulty differentiating acute myeloid leukemia (AML) M2 with marked myeloid differentiation from myeloid crisis of Philadelphia chromosome (Ph)-negative CML. Immature myeloid cells in the peripheral blood disappeared and cytogenetic analysis indicated that marrow cells changed to the normal karyotype after remission induction therapy. Therefore, this case was thought not to be myeloid crisis but AML M2 subtype. TheNUP98/HOXA9 fusion transcript was detected by reverse transcription-polymerase chain reaction (RT-PCR) at exon A but not exon B ofNUP98.

Key words

t(7:11)(p15:p15) AML HOXA9 NUP98 

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Copyright information

© The Japanese Society of Hematology 2002

Authors and Affiliations

  • Keiki Kawakami
    • 1
  • Setsuko Miyanishi
    • 2
  • Kazuhiho Nishii
    • 3
  • Eiji Usui
    • 3
  • Tetsuya Murata
    • 4
  • Isaku Shinsato
    • 5
  • Hiroshi Shiku
    • 3
  1. 1.Division of HematologySuzuka General HospitalYasuzuka-cho, Suzuka-shi, MieJapan
  2. 2.Division of Medical ResearchTenri HospitalNara
  3. 3.The Second Department of Internal MedicineMie University School of MedicineTsu
  4. 4.Division of Pathology and Clinical LaboratoriesSuzuka General HospitalSuzuka
  5. 5.Division of HematologyNishi-Kobe Medical CenterKobeJapan

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