alexa EUTOS CML prognostic scoring system predicts ELN-based 'event-free survival' better than Euro Hasford and Sokal systems in CML patients receiving front-line imatinib mesylate.


Journal of Leukemia

Author(s): Uz B, Buyukasik Y, Atay H, Kelkitli E, Turgut M,

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Abstract OBJECTIVES: The validity of the three currently used chronic myeloid leukemia (CML) scoring systems (Sokal CML prognostic scoring system, Euro/Hasford CML scoring system, and the EUTOS CML prognostic scoring system) were compared in the CML patients receiving frontline imatinib mesylate. PATIENTS AND METHODS: One hundred and fourty-three chronic phase CML patients (71 males, 72 females) taking imatinib as frontline treatment were included in the study. The median age was 44 (16-82) years. Median total and on-imatinib follow-up durations were 29 (3.8-130) months and 25 (3-125) months, respectively. RESULTS: The complete hematological response (CHR) rate at 3 months was 95\%. The best cumulative complete cytogenetic response (CCyR) rate at 24 months was 79.6\%. Euro/Hasford scoring system was well-correlated with both Sokal and EUTOS scores (r = 0.6, P < 0.001 and r = 0.455, P < 0.001). However, there was only a weak correlation between Sokal and EUTOS scores (r = 0.2, P = 0.03). The 5-year median estimated event-free survival for low and high EUTOS risk patients were 62.6 (25.7-99.5) and 15.3 (7.4-23.2) months, respectively (P < 0.001). This performance was better than Sokal (P = 0.3) and Euro/Hasford (P = 0.04) scoring systems. Overall survival and CCyR rates were also better predicted by the EUTOS score. DISCUSSION: EUTOS CML prognostic scoring system, which is the only prognostic system developed during the imatinib era, predicts European LeukemiaNet (ELN)-based event-free survival better than Euro/Hasford and Sokal systems in CML patients receiving frontline imatinib mesylate. This observation might have important clinical implications. This article was published in Hematology and referenced in Journal of Leukemia

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