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Survival trends in childhood chronic myeloid leukaemia in Southern-Eastern Europe and the United States of America
Authors
M.A. Karalexi Baka, M. Ryzhov, A. Zborovskaya, A. Dimitrova, N. Zivkovic, S. Eser, S. Antunes, L. Sekerija, M. Zagar, T. Bastos, J. Demetriou, A. Agius, D. Florea, M. Coza, D. Polychronopoulou, S. Stiakaki, E. Moschovi, M. Hatzipantelis, E. Kourti, M. Graphakos, S. Pombo-de-Oliveira, M.S. Adami, H.O. Petridou, E.T.
Publication date
1 January 2016
Publisher
Abstract
Aim To assess trends in survival and geographic disparities among children (0–14 years) with chronic myeloid leukaemia (CML) before and after the introduction of molecular therapy, namely tyrosine kinase inhibitors (TKIs) in Southern-Eastern European (SEE) countries and the USA. Methods We calculated survival among children with CML, acute lymphoblastic (ALL) and acute myeloid leukaemia (AML) in 14 SEE (1990–2014) cancer registries and the U.S. Surveillance, Epidemiology and End Results Program (SEER, 1990–2012). We used Kaplan–Meier curves and multivariate Cox regression models to calculate hazard ratios (HRs) with 95% confidence intervals (CIs). Results Among 369 CML cases, substantial improvements were noted in 2-year survival during the post-TKI (range: 81–89%) compared to pre-TKI period (49–66%; HR: 0.37, 95% CI: 0.23–0.60). Risk of death was three times higher for <5-year-old children versus those aged 10–14 years (HR: 3.03, 95% CI: 1.85–4.94) and 56% higher for those living in SEE versus SEER (HR: 1.56, 95% CI: 1.01–2.42). Regardless of geographic area and period of TKI administration, however, age seems to be a significant determinant of CML prognosis (pre-TKI period, HR0–4y: 2.71, 95% CI: 1.53–4.79; post-TKI period, HR0–4y: 3.38, 95% CI: 1.29–8.85). Noticeably, post-TKI survival in CML overall approximates that for ALL, whereas therapeutic advancements for AML remain modest. Conclusion Registry data show that introduction of molecular therapies coincides with revolutionised therapeutic outcomes in childhood CML entailing dramatically improved survival which is now similar to that in ALL. Given that age disparities in survival remain substantial, offering optimal therapy to entire populations is an urgent priority. © 2016 Elsevier Lt
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Last time updated on 10/02/2023