Abstract: Background In newly diagnosed acute myeloid leukemia (AML), the general recommendation is to start treatment immediately after the diagnosis has been made. This paradigm is based both on the observation that untreated acute leukemia has a poor prognosis and on retrospective analyses demonstrating a shorter survival in younger AML patients (pts) in whom treatment was delayed by more than 5 days (Sekeres et al., 2009). A more recent single-center analysis came to a different conclusion, showing no prognostic effect for the time from diagnosis to treatment (TDT; Bertoli et al., 2013). We explored the relationship between TDT and prognosis on a large set of real-world data from the AML registry of the Study Alliance Leukemia (SAL) and compared it to the published cohorts. Methods The SAL runs a transregional AML registry in 46 treatment centers across Germany (NCT03188874). All registered patients with an intensive induction treatment, a minimum follow-up time of 12 months and no acute promyelocytic leukemia were selected (n=2,200). Treatment start was defined by the first day of cytarabine, whereas single agent hydroxyurea (HU) was labeled as pretreatment. We analyzed the influence of TDT on complete remission (CR), early death (ED) and overall survival (OS) in univariable analyses for each day of treatment delay, in groups of 0-5, 6-10, 11-15 and & gt;15 days of TDT, and by using the restricted cubic spline (RCS) method for data modelling. In order to adjust for the influence of established prognostic variables on the outcomes, we used multivariable regression models and propensity score weighting. The influence of HU pretreatment on outcomes was investigated by introducing an interaction term between TDT and the presence of HU pretreatment. Results The median age was 59 years (y) (IQR 50-68), the proportion of pts with favorable, intermediate and adverse genetic risk according to ELN was 27%, 53%, and 20%; & gt;95% of pts received induction treatment with standard 7+3. HU pretreatment was administered in 4% of pts. The median TDT was 3 days (IQR 2-6). Descriptive statistics after grouping of pts showed the highest median age and the lowest proportion of NPM1 mutated and favorable risk in the TDT group 11-15. Of all pts, 79% achieved a CR/CRi; unadjusted CR rates for the patient groups with TDT of 0-5, 6-10, 11-15 and & gt;15 days were 80%, 77%, 74% and 76%, respectively (p=0.317). In multivariable analysis accounting for the influence of ELN risk, age, WBC, LDH, de novo versus secondary AML and ECOG, the OR for each additional day of TDT was 0.99 (95%-CI, 0.97-1.00; p=0.124). Four percent of pts died within the first 30 days from treatment start. The respective rates in the four TDT categories were 4.0%, 3.8%, 5.1% and 4.1% (p=0.960). In multivariable analysis, the OR for TDT was 1.01 (95%-CI, 0.98-1.05; p=0.549). After a median follow-up of 40 months, the 2-y OS of all pts was 51%. The unadjusted 2-y OS rates stratified by TDT of 0-5, 6-10, 11-15, & gt;15 days were 52, 49, 46, and 51% (see Table 1 and Figure 1). The hazard ratio (HR) for each day of treatment delay was 1.00 (95%-CI; 0.99-1.01; p=0.317). In multivariable Cox regression analysis, the HR for TDT as continuous variable was 1.00 (95%-CI, 0.99-1.01; p=0.689). When OS was analyzed separately stratified for age ≤60 and & gt;60 ys and for high versus lower initial WBC defined by a threshold of 50 x 109/L, no significant differences between TDT groups were observed. Multivariable models using TDT as a grouped variable or with RCS did not provide evidence for a significant influence of TDT on outcomes. Propensity score matching of pts in the four TDT groups did not reveal an influence on outcomes. The use of HU was not associated with CR, ED nor OS. Conclusion Our study on 2,200 newly diagnosed registry pts receiving consistent intensive induction with standard-dose cytarabine plus daunorubicin (7+3) suggests that TDT is not related to response or survival, neither in younger nor in older pts. Despite multivariable analyses, a bias towards longer TDT intervals in pts judged to be clinically stable by the treating physician cannot be excluded entirely. As treatment stratification in intensive first-line treatment of AML evolves, the TDT data suggests that it may be a safe and reasonable approach to wait for genetic and other laboratory test results in order to assign clinically stable pts to the best available treatment option before the start of intensive treatment. Disclosures Krämer: Daiichi-Sankyo: Honoraria, Membership on an entity's Board of Directors or advisory committees; Bayer: Research Funding; BMS: Research Funding; Roche: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees. Hänel:Roche: Honoraria; Amgen: Honoraria; Celgene: Other: advisory board; Novartis: Honoraria; Takeda: Other: advisory board. Jost:Daiichi: Honoraria; Sanofi: Honoraria; Gilead: Other: travel grants; Jazz Pharmaceuticals: Honoraria. Brümmendorf:Merck: Consultancy; Janssen: Consultancy; Novartis: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding; University Hospital of the RWTH Aachen: Employment; Ariad: Consultancy. Krause:Siemens: Research Funding; Takeda: Honoraria; MSD: Honoraria; Gilead: Other: travel; Celgene Corporation: Other: Travel. Scholl:Novartis: Other: Project funding; Pfizer: Other: Advisory boards; Gilead: Other: Project funding; Daiichi Sankyo: Other: Advisory boards; AbbVie: Other: Advisory boards. Hochhaus:Pfizer: Research Funding; Novartis: Research Funding; BMS: Research Funding; Incyte: Research Funding; MSD: Research Funding. Kiani:Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. Middeke:Sanofi: Research Funding, Speakers Bureau; Roche: Speakers Bureau; AbbVie: Consultancy, Speakers Bureau; Gilead: Consultancy; Janssen: Consultancy, Speakers Bureau; MSD: Consultancy. Thiede:AgenDix GmbH: Employment, Equity Ownership; Novartis: Research Funding, Speakers Bureau; Bayer: Research Funding; Daiichi-Sankyo: Speakers Bureau. Stoelzel:JAZZ Pharmaceuticals: Consultancy; Neovii: Other: Travel funding; Shire: Consultancy, Other: Travel funding. Platzbecker:Celgene: Consultancy, Honoraria, Research Funding; Abbvie: Consultancy, Honoraria; Novartis: Consultancy, Honoraria, Research Funding.

Abstract: Vascular and cardiac safety during tyrosine kinase inhibitor (TKI) therapy is an emerging issue. We evaluated vascular/cardiac toxicities associated with long‐term bosutinib treatment for Philadelphia chromosome‐positive (Ph+) leukemia based on treatment‐emergent adverse events (TEAEs) and changes in QTc intervals and ejection fraction in two studies: a phase 1/2 study of second‐/third‐/fourth‐line bosutinib for Ph+ leukemia resistant/intolerant to prior TKIs ( N  = 570) and a phase 3 study of first‐line bosutinib ( n  = 248) versus imatinib ( n  = 251) in chronic phase chronic myeloid leukemia. Follow‐up time was ≥48 months (both studies). Incidences of vascular/cardiac TEAEs in bosutinib‐treated patients were 7%/10% overall with similar incidences observed with first‐line bosutinib (5%/8%) and imatinib (4%/6%). Few patients had grade ≥3 vascular/cardiac events (4%/4%) and no individual TEAE occurred in 〉 2% of bosutinib patients. Exposure‐adjusted vascular/cardiac TEAE rates (patients with events/patient‐year) were low for second‐line or later bosutinib (0.037/0.050) and not significantly different between first‐line bosutinib (0.015/0.024) and imatinib (0.011/0.017; P  ≥ 0.267). Vascular/cardiac events were managed mainly with concomitant medications (39%/44%), bosutinib treatment interruptions (18%/21%), or dose reductions (4%/8%); discontinuations due to these events were rare (0.7%/1.0%). Based on logistic regression modelling, performance status 〉 0 and history of vascular or cardiac disorders were prognostic of vascular/cardiac events in relapsed/refractory patients; hyperlipidemia/hypercholesterolemia and older age were prognostic of cardiac events. In newly diagnosed patients, older age was prognostic of vascular/cardiac events; history of diabetes was prognostic of vascular events. Incidences of vascular and cardiac events were low with bosutinib in the first‐line and relapsed/refractory settings following long‐term treatment in patients with Ph+ leukemia. Am. J. Hematol. 91:606–616, 2016. © 2016 Wiley Periodicals, Inc.

Abstract: Objectives: Bosutinib (BOS), an oral dual Src/Abl tyrosine kinase inhibitor for adult patients with Philadelphia chromosome−positive chronic myeloid leukemia (Ph+ CML), has a recommended starting dose of 500 mg/d. This analysis evaluates efficacy and safety following BOS dose reduction due to intolerance in patients with Ph+ CML. Methods: Data from 2 studies were analyzed: a phase 1/2 study (NCT00261846) that included patients with chronic phase (CP) CML following resistance/intolerance to imatinib (IM; CP2L) or to IM plus dasatinib and/or nilotinib (CP3L), and those with accelerated/blast phase CML or acute lymphoblastic leukemia after at least IM (advanced [ADV]); and a phase 3 study (NCT00574873) in CP CML patients treated with BOS or IM as first-line therapy (CP1L). Results: Of 570 CP2L/CP3L/ADV patients receiving BOS (median treatment duration 11 months [range: 0.03−96]), 257 (45%) experienced ≥1 dose reduction (236 patients to 400 mg/d and 95 to 300 mg/d). Median time to dose reduction to 400 and 300 mg/d was 54.5 (range: 4-1875) and 146 days (8-2166), respectively; median duration of dose reduction was 3.6 (0.03-87.7) and 4.2 months (0.03-60.5), respectively. In CP1L, 248 patients received BOS (median treatment duration: 55.4 months [0.03−76] ), of whom 111 (45%) experienced ≥1 dose reduction (103 to 400 mg/d and 56 to 300 mg/d). Median time to dose reduction to 400 and 300 mg/d was 64.0 (2-1714) and 139 days (20-1778), respectively; median duration of dose reduction was 2.6 (0.03-66.1) and 8.9 months (0.03-71.2), respectively. Patients achieved anew or maintained a previously achieved complete cytogenetic response following BOS dose reduction to 400 mg/d (achieved: 29% [CP2L/CP3L/ADV], 40% [CP1L] ; maintained: 13% [CP2L/CP3L/ADV], 26% [CP1L] ) and to 300 mg/d (achieved: 14% [CP2L/CP3L/ADV], 18% [CP1L] ; maintained: 24% [CP2L/CP3L/ADV], 45% [CP1L] ; Table 1). Treatment-emergent adverse events (TEAEs) were generally similar in incidence, type, and severity before vs after BOS dose reduction. However, incidences of certain gastrointestinal TEAEs were lower and of similar severity following BOS dose reduction to 400 mg/d (diarrhea: 84% vs 50% [CP2L/CP3L/ADV], 70% vs 41% [CP1L] ; nausea: 45% vs 23% [CP2L/CP3L/ADV], 34% vs 21% [CP1L] ; vomiting: 33% vs 21% [CP2L/CP3L/ADV], 28% vs 22% [CP1L] ) or to 300 mg/d (diarrhea: 85% vs 31% [CP2L/CP3L/ADV], 75% vs 38% [CP1L] ; nausea: 43% vs 14% [CP2L/CP3L/ADV], 43% vs 21% [CP1L] ; vomiting: 34% vs 11% [CP2L/CP3L/ADV], 34% vs 18% [CP1L] ). Conclusions: CP2L/CP3L/ADV and CP1L CML patients who required BOS dose reduction due to AEs were still able to achieve or maintain cytogenetic responses and appeared to experience fewer gastrointestinal AEs. Disclosures Kota: Incyte: Membership on an entity's Board of Directors or advisory committees; Ariad Pharmaceuticals: Membership on an entity's Board of Directors or advisory committees; Leukemia Lymphoma Society: Research Funding; Pfizer: Membership on an entity's Board of Directors or advisory committees. Brümmendorf:Novartis: Consultancy, Honoraria, Research Funding; Ariad: Consultancy, Honoraria; Pfizer: Consultancy, Honoraria; Bristol-Myers Squibb: Consultancy, Honoraria; Patent on the use of imatinib and hypusination inhibitors: Patents & Royalties. Gambacorti-Passerini:Bristol-Myers Squibb: Consultancy; Pfizer: Consultancy, Research Funding. Cortes:ARIAD: Consultancy, Research Funding; BMS: Consultancy, Research Funding; Novartis: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding; Teva: Research Funding. Lipton:Ariad: Consultancy, Research Funding; Novartis: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding; BMS: Consultancy, Research Funding. Kantarjian:Bristol-Myers Squibb: Research Funding; ARIAD: Research Funding; Amgen: Research Funding; Pfizer Inc: Research Funding; Delta-Fly Pharma: Research Funding; Novartis: Research Funding. Kim:Pfizer: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; ILYANG: Consultancy, Honoraria, Research Funding; Novartis: Consultancy, Honoraria, Research Funding, Speakers Bureau; BMS: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. An:Pfizer Inc: Employment. Leip:Pfizer Inc: Employment. Crescenzo:Pfizer Inc: Employment. Woloj:Pfizer Inc: Employment. Shapiro:Pfizer Inc: Employment, Equity Ownership. Khoury:Pfizer Inc: Membership on an entity's Board of Directors or advisory committees; BMS: Membership on an entity's Board of Directors or advisory committees; Novartis: Membership on an entity's Board of Directors or advisory committees; Ariad: Membership on an entity's Board of Directors or advisory committees.

Abstract: Bosutinib is an Src/Abl tyrosine kinase inhibitor (TKI) indicated for adults with Ph+ chronic myeloid leukemia (CML) resistant/intolerant to prior TKIs. This long‐term update of an ongoing phase 1/2 study evaluated the efficacy and safety of third‐/fourth‐line bosutinib in adults with chronic phase (CP) CML. Median durations of treatment and follow‐up were 8.6 (range, 0.2–87.7) months and 32.7 (0.3–93.3) months, respectively. Cumulative confirmed complete hematologic response (cCHR) and major cytogenetic response (MCyR) rates were 74% (95% CI, 65–81%) and 40% (31–50%), respectively; Kaplan–Meier (K–M) probability of maintaining cCHR or MCyR at 4 years was 63% (95% CI, 50–73%) and 69% (52–81%). Cumulative incidence of on‐treatment disease progression (PD)/death at 4 years was 24% (95% CI, 17–33%); K–M 4‐year overall survival was 78% (68–85%). Baseline Ph+ cells ≤35 vs. ≥95% was prognostic of MCyR and CCyR by 3 and 6 months, increased baseline basophils was prognostic of PD/death, and no prior response to second‐line TKI was prognostic of death. Common adverse events included diarrhea (83%), nausea (48%), vomiting (38%), and thrombocytopenia (39%). Bosutinib demonstrates durable efficacy and a toxicity profile similar to previous bosutinib studies in CP CML patients resistant/intolerant to multiple TKIs, representing an important treatment option for patients in this setting. This trial is registered at www.clinicaltrials.gov (NCT00261846). Am. J. Hematol. 91:1206–1214, 2016. © 2017 The Authors American Journal of Hematology Published by Wiley Periodicals, Inc.

Abstract: Bosutinib (BOS), a Src/Abl tyrosine kinase inhibitor (TKI), is approved for adults with Philadelphia chromosome-positive (Ph+) CML that is resistant/intolerant to prior therapy. In this retrospective analysis, baseline and on-treatment characteristics of chronic phase (CP) CML pts receiving second-line BOS following imatinib resistance (IM-R) or intolerance (IM-I) in an ongoing open-label, phase 1/2 study and a long-term extension study were examined to identify potential predictors of duration of major cytogenetic response (MCyR), overall survival (OS), and progression-free survival (PFS), using a backward-elimination multivariate Cox regression model. A total of 284 (IM-R, n=195; IM-I, n=89) pts who received BOS starting at 500 mg/d were included in this analysis. Median (range) age was 53 (18‒91) y; time from CML diagnosis was 3.7 (0.1‒15.1) y; treatment duration was 25.6 (0.2‒106.7) mo; follow-up duration was 53.7 (0.5‒106.8) mo. For the last enrolled patient, time from first BOS dose was ≥6 y. After ≥6 y of follow-up, median MCyR duration and OS were not yet reached. Kaplan-Meier estimated probability of maintaining MCyR at 6 y was 71%, OS rate was 83%, and cumulative incidence of on-treatment disease progression or death was 21%. Several factors were identified as predictive of MCyR duration, OS or PFS, including baseline Ph+ ratio ≥95% vs ≤35% and MCyR by week 12, which were significant predictors of all 3. Other significant predictors of decreased OS included: age ≥65, BOS-sensitive mutations vs no mutations and higher peripheral blood (PB) blasts at baseline (all P ≤0.031; Table). Other significant predictors of decreased PFS included: higher PB blasts and no dose reduction to 400 mg/d due to AEs (all P ≤0.025; Table). Prior IM response or resistance did not predict long-term outcomes, nor did any treatment-emergent adverse events examined except for abnormal liver function test (LFT), which was predictive of increased OS. In conclusion, pts with CP CML resistant/intolerant to IM treated with BOS were identified as having an increased risk of poorer outcomes if they had the following characteristics: baseline Ph+ ratio ≥95% vs ≤35%, higher PB blasts at baseline or no MCyR by week 12. Having a better understanding of factors that may be predictive of long-term patient outcomes with TKI therapies may aid healthcare providers in the future selection of optimal treatment regimens for pts with Ph+ CML. Disclosures Cortes: ARIAD Pharmaceuticals Inc.: Consultancy, Research Funding; BMS: Consultancy, Research Funding; Novartis: Consultancy, Research Funding; Teva: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding. Brümmendorf:Ariad: Consultancy, Honoraria; Novartis: Consultancy, Honoraria, Research Funding; Pfizer: Consultancy, Honoraria; Bristol-Myers Squibb: Consultancy, Honoraria; Patent: Patents & Royalties: Patent on the use of imatinib and hypusination inhibitors. Kim:BMS: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Novartis: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Pfizer: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; ILYANG: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. Schafhausen:ARIAD: Consultancy, Honoraria; Pfizer: Consultancy, Honoraria; BMS: Consultancy, Honoraria; Novartis: Consultancy, Honoraria. Nadanaciva:Pfizer Inc: Employment. Bardy-Bouxin:Pfizer Inc: Employment. Shapiro:Pfizer Inc: Employment, Other: Stock Ownership. Leip:Pfizer Inc: Employment. Lipton:Ariad: Equity Ownership, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; BMS: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Pfizer: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. Gambacorti-Passerini:Pfizer: Consultancy, Research Funding; BMS: Consultancy.

Abstract: Introduction: Polycythemia vera (PV) is a myeloproliferative neoplasm (MPN) characterized by expansion of the granulocytic, erythrocytic, and megakaryocytic lineages in the bone marrow and peripheral blood, and in most cases, by the presence of a JAK2 mutation. Survival of patients with PV is decreased compared with age-matched controls, and this is mainly due to thromboembolic complications followed by progression to post-PV myelofibrosis and acute leukemia. While no curative treatment exists, cytoreductive treatment with hydroxyurea (HU) or ropeginterferon is approved in EU for first-line therapy, and ruxolitinib (RUX) is approved in EU and US for second-line therapy in patients with HU intolerance or resistance. The current futility analysis assesses the efficacy of ruxolitinib in newly-diagnosed PV treated within the Ruxo-BEAT trial. Methods: This clinical trial entitled "Ruxolitinib versus Best Available Therapy in patients with high-risk Polycythemia Vera or high-risk Essential Thrombocythemia" (Ruxo-BEAT; NCT02577926) is a multicenter, open-label, two-arm phase-IIb trial with a target population of 380 pts with PV and ET. Patients in first-line PV and in first and later lines ET are randomized in a 1:1 manner to receive either RUX or best available therapy (BAT). Crossover from BAT to RUX is possible in eligible patients after 6 months. Patients with PV in the RUX arm receive a starting dose of 10 mg bid and may increase their dose up to 20 mg bid. Primary endpoint is the rate of complete clinicohematologic response rate (CHR) at month 6 as defined by Barosi et al Blood 2009. Secondary endpoints include differences in the absence of phlebotomies, spleen size, patient-reported outcomes, and survival. This is a pre-specified futility analysis of RUX in the PV arm, after 50 PV patients had been enrolled. Of the 50 patients, 28 patients with newly-diagnosed PV were randomized into the RUX arm and were analyzed (a maximum of 6 weeks of HU, anagrelide, or interferon therapy was allowed). The PV arm would have to be closed if no favorable trend were observed for RUX for any of the following variables: (1) improvement (decrease) in the hematocrit level during 6 months of treatment, (2) improvement (decrease) of the JAK2V617F allele burden during 6 months of treatment, or (3) improvement of one of the following three symptom variables assessed by physician´s judgement or via MPN Symptom Assessment Form (MPN-SAF) during 6 months of treatment: pruritus, night sweats, or bone pain. Differences between screening (Hct) or baseline (all other variables) and end of month 6 (all variables) were calculated using Fisher´s exact test (for physician-assessed pruritus and night sweats) or the Wilcoxon matched-pairs signed rank test (all other variables). Results: 28 patients received RUX for at least 6 months. After 6 months, the mean hematocrit level decreased from 45.9+/-5.6% to 41.0+/-5.0% (mean+/-SD) (p=0.0003). The number of phlebotomies calculated per year decreased from 4.2+/-3.9% to 0.96+/-2.1 (p=0.0009). Mean JAK2V617F allele burden decreased from 50.2+/28.4% to 44.0+/-28.5% (p=0.0039). The percentage of patients, as assessed by the physician, with pruritus or night sweats decreased from 41% to 26% (trending with p=0.13), and from 30% to 11% (p=0.02), respectively. The points reported by patients themselves on the MPN-SAF survey for pruritus decreased from 2.7+/-3.0 to 1.3+/-1.5 (p=0.0095) and there was a strong trend for reduction of night sweat points (from 3.1+/-3.6 to 1.6+/-2.4; p=0.0579), while the points for bone pain remained unaltered (2.0+/-2.8 to 1.4+/-2.2; p=0.215). Conclusion: Treatment with ruxolitinib in first line PV is efficient regarding the above-mentioned endpoints. Recruitment of our trial will be ongoing. In order not to weaken the study´s statistical power, comparison of both arms was not performed. Disclosures Koschmieder: Ariad: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Novartis: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Roche: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Bristol Myers-Squibb: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Incyte: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Shire: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Novartis Foundation: Research Funding; CTI: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; AOP Pharma: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Bayer: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Pfizer: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees. Isfort:Mundipharma: Other: Travel reimbursement; Amgen: Other: Travel reimbursement; Hexal: Other: Travel reimbursement; BMS: Honoraria; Ariad: Consultancy, Honoraria; Pfizer: Consultancy, Honoraria, Other: Travel reimbursement; Novartis: Consultancy, Honoraria, Other: Travel reimbursement; Roche: Other: Travel reimbursement; Alexion: Other: Travel reimbursement. Schafhausen:Novartis: Consultancy, Honoraria; Incyte: Consultancy, Equity Ownership, Honoraria. Griesshammer:Novartis: Consultancy, Honoraria, Speakers Bureau. Platzbecker:Abbvie: Consultancy, Honoraria; Celgene: Consultancy, Honoraria, Research Funding; Novartis: Consultancy, Honoraria, Research Funding. Döhner:CTI Biopharma: Consultancy, Honoraria; Daiichi: Honoraria; Jazz: Honoraria; Novartis: Honoraria; Celgene: Honoraria; Janssen: Honoraria. Jost:Abbvie: Consultancy, Patents & Royalties: Royalty payments for the drug compound ABT-199, Research Funding; Bohringer: Consultancy, Research Funding; BMS: Consultancy, Speakers Bureau; Novartis: Consultancy, Speakers Bureau; Pfizer: Consultancy, Speakers Bureau; Celgene: Other: Travel Support; Novartis: Research Funding. von Bubnoff:Novartis: Research Funding. Stegelmann:Novartis: Consultancy, Honoraria; Incyte: Consultancy, Honoraria. Crysandt:Amgem: Other: travel grant; celgene: Other: travel grant; Pfizer: Other: travel grant; Gilead: Other: travel grant; Incyte: Membership on an entity's Board of Directors or advisory committees. Gezer:AMGEM: Membership on an entity's Board of Directors or advisory committees. Brümmendorf:Merck: Consultancy; Pfizer: Consultancy, Research Funding; University Hospital of the RWTH Aachen: Employment; Janssen: Consultancy; Ariad: Consultancy; Novartis: Consultancy, Research Funding. OffLabel Disclosure: Ruxolitinib as first-line treatment in newly-diagnosed PV

Abstract: Health‐related quality of life (assessed with the Functional Assessment of Cancer Therapy–Leukemia) and the general health status (assessed with the EuroQol 5‐Dimensions Questionnaire) were largely maintained in chronic‐phase chronic myeloid leukemia patients receiving bosutinib for 264 weeks or longer. Health‐related quality of life was maintained by patients who receive bosutinib as a second‐ or third‐line treatment for chronic‐phase chronic myeloid leukemia.