Treatment Outcomes of Acute Lymphoblastic Leukemia in both children and adults using the Thai Pediatric Oncology Group-based protocol at Chiang Mai University hospital

Authors

  • Walaithip Bunyatisai Department of Statistics, Faculty of Science, Chiang Mai University
  • Bongkot Jia-Mahasap Division of Hematology and Oncology, Department of Pediatrics, Faculty of Medicine, Chiang Mai University
  • Imjai Chitapanarux Division of Therapeutic Radiology and Oncology, Department of Radiology, Faculty of Medicine, Chiang Mai University

Keywords:

Acute lymphoblastic leukemia, Chiang Mai Cancer Registry, outcomes, ThaiPOG

Abstract

Backgrounds: Acute lymphoblastic leukemia (ALL) occurs in both children and adults. It is the most common type of cancer in children and its prognosis is not optimistic in adults. According to the advent of effective ALL therapy, long-term survival rates and cured rates could be more than 80%. However, that in Thailand between 1995 and 2009 ranged from 51–59%. Objective: This study analyses the outcomes of the National Health Security Office (NHSO) ALL national protocols in Thai children and adults, using data collected from the Chiang Mai Cancer Registry, Faculty of Medicine, Chiang Mai University. Materials and methods: Participants were 83 children and 54 adult patients with ALL between 2005 and 2012. The newly-diagnosed high-risk patients might have been received prophylactic cranial irradiation (PCI). The demographic, clinical characteristics, treatment outcomes, incidence and site of relapse were analyzed using descriptive statistics. The analyses were separated into two parts between children and adults ALL patients: estimated disease-free survival (DSF) and the relapse rates using Kaplan-Meier method and compared the relapse rates in adults using log-rank test. Results: The five-year overall survival rate for children was 59.04% (45.65% in the high-risk and 70.27% in the standard-risk groups) and for those who relapsed was 21.69% (26.09% and 12.22%, respectively). The five-year DFS rates were 62.6% and 81.2% in the high-risk and standard-risk groups, respectively. In adults, the five-year survival rate was 25.93% and it was 46.30% in those who relapsed, and the five-year DFS rate was 36.2%. The most relapses occurred in central nervous system (CNS). Conclusion: The standard national protocols for ALL could not improve the outcomes. The relapse occurrence of ALL was still quite common in both children and adults. PCI has been shown a slightly better outcome in terms of prevention or delayed CNS relapse.

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Published

2019-06-27

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1.
Bunyatisai W, Jia-Mahasap B, Chitapanarux I. Treatment Outcomes of Acute Lymphoblastic Leukemia in both children and adults using the Thai Pediatric Oncology Group-based protocol at Chiang Mai University hospital. J Thai Assn of Radiat Oncol [Internet]. 2019 Jun. 27 [cited 2024 Nov. 15];25(1):12-28. Available from: https://he01.tci-thaijo.org/index.php/jtaro/article/view/203011

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