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Inversion(10)(q11q24) in a case of adult T-cell leukemia
T Itoyama1, N Sadamori, H Nakamura
1Department of Hematology, Nagaski University School of Medicine, Japan.
Insights
This study details a rare chromosome inversion, inv(10)(q11q24), found in adult T-cell leukemia (ATL). This finding suggests a potential new link between this specific chromosomal anomaly and T-cell neoplasia.
Area of Science:
- Hematology
- Cytogenetics
- Oncology
Background:
- Adult T-cell leukemia (ATL) is a lymphoid neoplasm.
- Chromosome 10 abnormalities are observed in ATL and other lymphoid cancers.
- The 10q24 region is implicated in leukemogenesis due to HOX11 gene rearrangements.
Observation:
- A 64-year-old male patient presented with ATL and complex chromosomal abnormalities.
- The specific abnormality identified was an inversion of chromosome 10, denoted as inv(10)(q11q24).
- This inversion has been previously reported in only one other case of T-cell chronic lymphocytic leukemia.
Findings:
- The inv(10)(q11q24) represents a rare chromosomal anomaly.
- The 10q24 region's involvement in leukemogenesis is supported by its association with the HOX11 gene.
- This case expands the known cytogenetic landscape of T-cell malignancies.
Implications:
- The inv(10)(q11q24) may represent a novel cytogenetic marker associated with T-cell neoplasia.
- Aberrations involving 10q24 could serve as crucial diagnostic clues for understanding the pathogenesis of peripheral T-cell neoplasms.
- Further research is warranted to elucidate the role of this inversion in T-cell leukemogenesis.
Abstract:
We report a case of adult T-cell leukemia (ATL) with complex chromosome abnormalities including an inversion (10)(q11q24) in a 64-year-old man. Although some abnormalities of chromosome 10 have been seen in ATL and other lymphoid neoplasias, inv(10)(q11q24) has previously been reported only in a case of T-cell chronic lymphocytic leukemia. Recent studies have revealed a rearrangement of a novel homeobox-containing gene called TCL-3 or HOX11 on 10q24 in T-cell acute lymphoblastic leukemia with the specific chromosome translocation t(10;14)(q24;q11), and thus the significance of 10q24 aberrations in leukemogenesis is indicated. We suggest that, despite the rarity of this anomaly, inv(10) (q11q24) may be a new chromosome inversion related to T-cell neoplasia and that the 10q24 anomaly may be an important cytogenetic clue for the elucidation of the pathogenesis of some peripheral T-cell neoplasias.