Abstract
Patients with chronic lymphocytic leukemia (CLL) with 13q deletion as the sole cytogenetic abnormality usually have a favorable outcome, but the frequency of the 13q14 deletion and its impact on the outcome of other B-cell chronic lymphoproliferative disorders (BCLPDs) remain unclear. To further characterize this aberration, we investigated the prognostic significance of 13q deletion in 541 patients with BCLPDs. We performed fluorescence in situ hybridization (FISH) studies with 13q locus-specific LSI-D13S25 and LSI-RB1 probes. 52.1% of the patients with CLL harbored 13q deletion, which was significantly higher than that of other BCLPDs (p < 0.001). The size of 13q deletion was heterogeneous in both CLL and other BCLPDs. However, the distribution of cases with different deletion sizes showed no significant difference between the two groups. Whereas 13q deletion was a favorable prognostic factor in CLL, a large deletion of 13q was associated with poor prognosis in terms of time to first therapy (p = 0.020), progression-free survival (p = 0.05) and overall survival (p = 0.002) in BCLPD cases other than CLL. In conclusion, the deletion of 13q varied in size both in CLL and in other BCLPDs and adversely influenced the prognosis of patients with other BCLPDs.
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Abbreviations
- BCLPDs:
-
B-cell chronic lymphoproliferative disorders
- I-FISH:
-
Interphase fluorescence in situ hybridization
- CLL:
-
Chronic lymphocytic leukemia
- TTFT:
-
Time to first therapy
- PFS:
-
Progression-free survival
- OS:
-
Overall survival
- SMZL:
-
Spleen marginal zone lymphoma
- HCL:
-
Hairy cell lymphoma
- WM:
-
Waldenström macroglobulinemia
- MALT:
-
Mucosa-associated lymphoid tissue lymphoma
- BMI:
-
Bone marrow involvement
- NMZL:
-
Nodal marginal zone lymphoma
- FL:
-
Follicular lymphoma
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This publication was funded by the Chinese Academy of Medical Sciences and Peking Union Medical College.
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Data collection was by SY, HL, WX, HL, SZ, WL, RL. SY, HL, CL, YX, GA, HW, KR performed analyses. SY, HL, ZL, ZY, DZ, LQ interpreted results of analyses. All authors prepared, reviewed and gave critical input into each stage of the manuscript.
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This study was approved by the Ethics Review Boards of Institute of Hematology and Blood Disease Hospital due to its retrospective character.
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Data are available on request from the authors, due to the fact that they contain treatment-specific information they may not be uploaded on a public shared base.
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This work is supported by grants from the National Science and Technology Supporting Program (2014BAI09B12), the National Natural Science Foundation of China (81370632 and 81400092), the Fundamental Application and Advanced Technology Research Program of Tianjin (15JCYBJC27900).
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The authors declare no competing financial interests.
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Yi, S., Li, H., Li, Z. et al. The prognostic significance of 13q deletions of different sizes in patients with B-cell chronic lymphoproliferative disorders: a retrospective study. Int J Hematol 106, 418–425 (2017). https://doi.org/10.1007/s12185-017-2240-2
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DOI: https://doi.org/10.1007/s12185-017-2240-2