Fluorescence in situ hybridization comparison of the prognostic factors in adult and pediatric acute lymphoblastic leukemia: A retrospective analysis of 282 cases

Cao,Pengfei; Yu,Yalan; Wang,Wei; Xu,He; He,Yuxiang

doi:10.3892/etm.2018.6821

Fluorescence in situ hybridization comparison of the prognostic factors in adult and pediatric acute lymphoblastic leukemia: A retrospective analysis of 282 cases

Authors:
- Pengfei Cao
- Yalan Yu
- Wei Wang
- He Xu
- Yuxiang He
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Affiliations: Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China, Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China, Cancer Research Institute, Key Laboratory of Carcinogenesis, Ministry of Health, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
Published online on: October 2, 2018 https://doi.org/10.3892/etm.2018.6821
Pages: 4674-4684
Copyright: © Cao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Acute lymphoblastic leukemia (ALL) affects both children and adults. However, the prognosis of the two cohorts is quite different. The present aim was to review and evaluate one potential cause of why survival is poorer in adult ALL than pediatric ALL via fluorescence in situ hybridization (FISH). Clinical significant features were analyzed in 282 ALL cases. FISH was performed to study mixed lineage leukemia (MLL) translocation and the Philadelphia (Ph) chromosome in newly diagnosed patients, and was used to detect trisomy 4 or 10 and the translocation ETS leukemia‑acute myeloid leukemia 1 (TEL‑AML1) fusion gene. The overall survival/event‑free survival (OS/EFS) outcome of adult ALL and pediatric ALL was analyzed using Kaplan‑Meier analysis. Adult ALL had a higher median leukocyte count and lower hemoglobin level than pediatric ALL. FISH revealed that Ph positivity (Ph+) was associated with the high‑risk feature of older age. In pediatric ALL, trisomy 4 or 10 was present in 71/207 cases (34.3%), while the TEL‑AML1 fusion gene was present in 16/207 cases (7.7%). By contrast, there were very few such positive cases in adult ALL. Survival analysis revealed that, in adult ALL, the 3‑year OS and EFS rates were higher in the Ph‑negative group than in the Ph+ group. Adult or pediatric ALL is an independent prognostic factor of OS. The present analysis of the clinical and biological features between adult and pediatric ALL indicates that adult ALL has a poorer prognosis than pediatric ALL based on Ph+ status and presence of trisomy 4 or 10. Ph+ ALL is an independent prognosis factor of ALL. FISH may serve an important role in the comparison of prognostic factors in adult and pediatric ALL.

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