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Case Reports
. 2019 Jun;10(3):153-156.
doi: 10.14740/wjon1211. Epub 2019 Jun 29.

Acute Myeloid Leukemia Acquiring Promyelocytic Leukemia-Retinoic Acid Receptor Alpha at Relapse

Affiliations
Case Reports

Acute Myeloid Leukemia Acquiring Promyelocytic Leukemia-Retinoic Acid Receptor Alpha at Relapse

Varsha Gupta et al. World J Oncol. 2019 Jun.

Abstract

Acute promyelocytic leukemia (APL) is identified as the M3 subtype of acute myeloid leukemia (AML). APL is presently one of the most curable leukemias. We describe here a rare case of APL who presented as a relapsed disease after 1 year of chemotherapy for AML. The patient lacked t(15;17) at the initial presentation but was present later at the time of relapse. The patient attained a complete remission following treatment with all-trans retinoic acid (ATRA) and arsenic trioxide-based therapy. We discuss the possible mechanism behind secondary acquisition of promyelocytic leukemia/retinoic acid receptor alpha (PML-RARA) at relapse of AML. We also briefly discuss the clinical features, diagnosis and treatment of APL.

Keywords: Acute myeloid leukemia; Acute promyelocytic leukemia; All-trans retinoic acid.

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Conflict of interest statement

The authors declare that there is no conflict of interest regarding the publication of this paper.

Figures

Figure 1
Figure 1
Bone marrow biopsy showing hypocellular marrow for age (× 100).
Figure 2
Figure 2
Bone marrow biopsy showing infiltration of marrow by monomorphic cells with fine chromatin and moderate amounts of granular cytoplasm (× 400).
Figure 3
Figure 3
Bone marrow biopsy. Promyelocyte (blast equivalent) showing Auer rods and cytoplasmic coarse granules and fine chromatin (oil, × 1,000).
Figure 4
Figure 4
Bone marrow biopsy. Promyelocyte with Auer rod marked with black arrow.
Figure 5
Figure 5
Flow cytometry. The blasts show high side scatter indicating complex cytoplasm.
Figure 6
Figure 6
Flow cytometry. The blasts are positive for CD117 and negative for CD34 and HLA-DR, highly suggestive of APL.

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