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Journal Article
Multicenter Study
Severe adverse events by tyrosine kinase inhibitors decrease survival rates in patients with newly diagnosed chronic-phase chronic myeloid leukemia.
European Journal of Haematology 2018 July
OBJECTIVE: This multicenter cooperative study aimed to analyze the adverse events (AEs) associated with tyrosine kinase inhibitors (TKIs) used as initial treatment for chronic-phase chronic myeloid leukemia (CML-CP) and their impact on outcome.
METHODS: We retrospectively evaluated 450 patients with CML-CP who received TKIs between 2004 and 2014.
RESULTS: The 5-year overall survival (OS) and event-free survival (EFS) rates were 95.1% and 89.0%, respectively. Patients with comorbidities (46.4%) and aged ≥60 years (50.4%) at diagnosis had significantly inferior OS to those without comorbidities and aged <60. Patients achieved higher rates of major molecular response (MMR) at 6 and 12 months after initial treatment with dasatinib or nilotinib compared to imatinib, but final MMR rates were almost the same. Sixty-six percent of patients required treatment modifications from first-line TKI therapy; the main reasons were AEs (48.4%) and failure (18%). Grade III-IV AEs in first-line TKI therapy were significantly correlated to inferior OS/EFS compared to grade 0-II AEs.
CONCLUSION: Although long-term outcomes were similar in CML-CP patients treated with each TKI regardless of first-line TKI selection, severe AEs in first-line TKI therapy decreased their survival rates. Early change in TKIs is recommended, when faced with severe AEs of specific TKIs.
METHODS: We retrospectively evaluated 450 patients with CML-CP who received TKIs between 2004 and 2014.
RESULTS: The 5-year overall survival (OS) and event-free survival (EFS) rates were 95.1% and 89.0%, respectively. Patients with comorbidities (46.4%) and aged ≥60 years (50.4%) at diagnosis had significantly inferior OS to those without comorbidities and aged <60. Patients achieved higher rates of major molecular response (MMR) at 6 and 12 months after initial treatment with dasatinib or nilotinib compared to imatinib, but final MMR rates were almost the same. Sixty-six percent of patients required treatment modifications from first-line TKI therapy; the main reasons were AEs (48.4%) and failure (18%). Grade III-IV AEs in first-line TKI therapy were significantly correlated to inferior OS/EFS compared to grade 0-II AEs.
CONCLUSION: Although long-term outcomes were similar in CML-CP patients treated with each TKI regardless of first-line TKI selection, severe AEs in first-line TKI therapy decreased their survival rates. Early change in TKIs is recommended, when faced with severe AEs of specific TKIs.
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