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Acute myeloid leukemia with t(5;11): two case reports.
1Department of Hematology and Oncology, Clinical Sciences for Pathological Organs, Graduate School of Medicine, Kyoto University, Japan.
Leukemia Research
|July 10, 1999
Summary
Rare chromosome 5;11 translocations in acute myeloid leukemia cases showed monocytic features, hyperleukocytosis, and chemoresistance. These findings highlight unique genetic markers in specific leukemia subtypes.
Area of Science:
- Hematology
- Cytogenetics
- Oncology
Background:
- Acute myeloid leukemia (AML) encompasses diverse subtypes with distinct genetic alterations.
- Chromosomal translocations are key drivers in leukemogenesis, influencing disease presentation and treatment response.
- Translocations involving chromosome 11q and 5q are infrequently reported in myeloid leukemias.
Observation:
- Two cases of acute leukemia with rare t(5;11) translocations are presented.
- One case of acute monocytic leukemia (AMoL) exhibited t(5;11)(q31;q23).
- A second case of acute myelomonocytic leukemia (AMMoL) showed t(5;11)(q35;q13.1).
Findings:
- Despite subtle differences in translocation breakpoints, both cases displayed significant monocytic morphology.
- Both patients presented with hyperleukocytosis, indicating a high white blood cell count.
- The leukemic cells demonstrated resistance to chemotherapy, posing a treatment challenge.
Implications:
- The t(5;11) translocation may represent a distinct genetic subgroup within acute myeloid leukemia.
- Understanding these rare translocations is crucial for accurate diagnosis and prognostication.
- The observed chemoresistance underscores the need for exploring alternative therapeutic strategies for these specific leukemia subtypes.