International Randomized Study of Interferon Versus STI571 (IRIS) 7-Year Follow-up: Sustained Survival, Low Rate of Transformation and Increased Rate of Major Molecular Response (MMR) in Patients (pts) with Newly Diagnosed Chronic Myeloid Leukemia in Chronic Phase (CMLCP) Treated with Imatinib (IM)

Abstract Background: Based on results from the IRIS trial, IM is the standard of care for pts with newly diagnosed CML-CP. This report presents the 7 yr data update of IRIS to assess long term outcome, response rate, and safety in pts on primary IM therapy. Methods: 553 pts were randomly assigned to IM and evaluated for hematologic, cytogenetic and molecular responses, discontinuations/cross-over reasons, event-free survival (EFS), progression to accelerated-phase (AP) or blast crisis (BC) and OS. Events for EFS were defined as the first occurrence of any of the following during treatment: death from any cause, progression to AP/BC, loss of a complete hematologic response or major cytogenetic response (MCyR), or an increasing white blood cell count to > 20 × 109/L. After discontinuation of study treatment, pts were followed only for OS. Results: At 7 yrs, the estimated EFS was 81%, freedom from progression (FFP) to AP/ BC was 93%, and the estimated OS was 86%. The best observed rates for MCyR and complete cytogenetic response (CCyR) were 89% and 82%, respectively. A total of 317 (57%) of all randomized pts remained on IM per protocol and were in CCyR. The estimated rates of progression to AP/BC from yrs 1 through 7 are 1.5, 2.8, 1.6, 0.9, 0.5, 0, and 0.4%, respectively, with one pt progressing to AP/BC between yrs 6 and 7. Yearly event rates are 3.3%, 7.5%, 4.8%, 1.7%, 0.8%, 0.3% and 2% (5 events occurred in the 7th yr: 3 unconfirmed loss of MCyR, 2 deaths). Of the 456 pts who achieved CCyR, 79 (17%) subsequently lost CCyR; 25 remained on IM (19 pts regained CCyR, of whom 6 responded to an increase in IM dose; 6 pts remained in MCyR without dose escalation). A total of 15 pts (3%) who achieved CCyR on IM progressed to AP/BC during study treatment, typically during the 1st year after achievement of CCyR; 3 CCyR pts progressed to AP/BC after the 2nd year. A total of 332 (60%) pts remain on IM on protocol at the 7-yr data cut-off. Reasons for discontinuation or crossover include: 5% adverse events/ safety, 15% lack of efficacy/progression, 3% bone marrow transplant, 2% death, and 15% other (protocol violation, withdrawal of consent or lack of renewal of consent, lost to follow-up, administrative) reasons. Between yrs 6 and 7, 17 pts (3%) discontinued IM for the following reasons: adverse events (n=3), death (n=2; 1 CML-related), unsatisfactory therapeutic effect (n=7; 1 progression to AP/BC, 4 unconfirmed loss of MCyR, 2 unconfirmed loss of CCyR), protocol violation (n=1), and withdrawal of consent (n=4). Molecular response (MR) assessment was required per the IRIS protocol only in pts who had achieved CCyR. However, MR was measured routinely in 98 pts treated in Australia/ New Zealand and Germany (sub-study) at baseline and every 3 mo through 72 mo, and other sites contributed assessments if available. Of the total IRIS IM cohort, 476 pts had at least one PCR measurement. MMR was defined as a ratio of BCR-ABL/control transcripts of ≤ 0.1% according to the International Scale. Table 1: MR over time: BCR-ABL/control gene transcript levels (as % of available samples) All available samples Sub-study samples Time-points (mo) n >10% > 1.0–≤10% > 0.1–≤1.0% ≤0.1% (MMR) n ≤0.1% (MMR) 3 174 25% 39% 24% 13% 87 8% 6 258 15% 17% 35% 33% 86 28% 12 305 9% 12% 30% 50% 81 47% 18 253 6% 10% 19% 65% 70 63% 48 238 6% 9% 10% 75% 66 82% 60 273 3% 4% 8% 85% 71 90% 72 210 2% 3% 9% 86% 57 88% The MMR rates at 12 and 48 mo for all available samples are consistent with the reported rates of 53% and 80%, respectively, noted in a subset of pts with CCyR (Druker et al, NEJM, 2006) and similar to the unselected sub-study data. Additionally, MMR responses at 12 mo are similar to the recently reported TOPS trial (Cortes et al, EHA 2008). Between yr 6 and 7, serious adverse events suspected to be related to IM were reported in 9 pts, resulting in treatment discontinuation in 3 pts. No new safety issues were identified. Conclusions: Responses with IM therapy remain durable with estimated 7 yr rates of FFP to AP/BC 93%, EFS 81%, and OS 86%. Only 1 patient progressed between yrs 6 and 7. The safety profile is unchanged and confirms a favorable risk-benefit ratio in CML-CP. Long-term follow-up of pts who continue to respond to IM demonstrate an MMR rate of 85–90% at 5–6 years. These results demonstrate increasing suppression of CML over time in patients who continue to receive imatinib.

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Five-Year Outcome of 215 Newly Diagnosed Chronic Myeloid Leukemia Patients Treated Frontline with Nilotinib-Based Regimens: A Gimema CML Working Party Analysis

Blood ◽

10.1182/blood.v124.21.3141.3141 ◽

2014 ◽

Vol 124 (21) ◽

pp. 3141-3141

Author(s):

Gabriele Gugliotta ◽

Fausto Castagnetti ◽

Massimo Breccia ◽

Luciano Levato ◽

Giovanna Rege-Cambrin ◽

...

Keyword(s):

Chronic Myeloid Leukemia ◽

Adverse Events ◽

Myeloid Leukemia ◽

Cytogenetic Response ◽

Molecular Response ◽

Newly Diagnosed ◽

Secondary Resistance ◽

Long Term Outcome ◽

Free Survival

Abstract Background. Nilotinib (NIL) is a potent and selective BCR-ABL inhibitor approved for the frontline treatment of chronic myeloid leukemia (CML) based on the results of the ENESTnd study. The sustained superiority of NIL vs. imatinib (IM) was confirmed after 5 years of follow-up (Hughes et al, abs. 677, EHA 2014). However, few data are available on patients (pts) treated frontline with NIL outside of Company-initiated trials. Objectives. To analyze the long-term outcome in a large, independent cohort of newly diagnosed CML pts treated frontline with NIL-based regimens. Methods. We analyzed 215 pts, enrolled in 2 multicenter phase II studies conducted by the GIMEMA CML WP (ClinicalTrials.gov. NCT00481052 and NCT00769327) or treated at the Bologna University Hospital, with NIL 300 mg or 400 mg BID as initial treatment; 123 pts received a sequential treatment with NIL and IM (NIL-IM), with a 3-months (mos) rotation period (all patients received NIL in the first 3 mos). The median age was 53 years (range 18–86). Ten out of 215 pts (5%) had a high EUTOS score. The median follow-up was 57 mos (range 36–81 mos). We assessed: the rates of Complete Cytogenetic Response (CCyR) and Major Molecular Response (MMR); the rates of optimal responders at each milestone according to ELN 2013 recommendations; the overall survival (OS; any death included), progression-free survival (PFS; progression to accelerated/blast phase [AP/BP] and deaths for any cause), failure-free survival (FFS; failures according to ELN 2013 recommendations and deaths for any cause), and event-free survival (EFS; events: failures, permanent discontinuation of NIL for any cause, including deaths). All analysis was made according to the intention-to-treat principle. Results. The cumulative rates of CCyR and MMR were 93% and 88%, respectively. At 3 mos, 82% of the pts were in Partial Cytogenetic Response and 90% had a BCR-ABL/ABL (IS) < 10%; at 6 mos, 86% were in CCyR and 83% had a BCR-ABL/ABL (IS) < 1%; at 12 mos, 72% were in MMR; all these pts were optimal responders according to ELN 2013 recommendations. Overall, 80 (37%) pts permanently discontinued NIL: 45 (21%) for adverse events or intolerance; 25 (12%) for failures; 7 (3%) while in stable MR4; 3 (1%) for other reasons. Cardiovascular adverse events (CVAE) were cause of permanent NIL discontinuation, after a median time of 37 mos, in 13 (6%) pts, and included 4 peripheral arterial occlusive diseases and 3 ischemic coronary diseases; only one pt died for CVAE. Nine (4.1%) pts progressed to AP/BP, 8/9 during the 1st year of therapy and one after 25 mos; all pts subsequently died (after a median of 13 mos, range 1-34 mos). NIL-resistant mutations were identified in 6 of these pts (4 T315I; 1 Y253H; 1 F359V); 7/9 progressions occurred in patients receiving NIL-IM. In addition, 6 pts were classified as failures at 3,6, or 12 mos according to ELN 2013 recommendations; afterwards, 10 pts developed a secondary resistance (3 loss of CHR, 3 loss of CCyR, and 4 confirmed loss of MMR). Overall, 17 (8%) pts died, in 7 cases for reasons unrelated to CML progression. The estimated 6-year OS, PFS, FFS, and EFS were 91%, 91%, 83%, and 59%, respectively. Conclusions. Our National experience showed that most pts treated frontline with NIL-based regimens were optimal responders according to ELN recommendations and that 91% of the patients were estimated to be alive and progression-free at 6 years. In particular, NIL alone was highly effective in the prevention of AP/BP. Considering that AP/BP had in most cases an early onset and an extremely poor prognosis, its prevention should be the priority of CML treatment, especially in the firsts 2-3 years. However, afterwards, the relatively high number of CVAE observed, suggests to focus, at least in selected patients, on strategies aimed at the prevention of CVAE (NIL dose reduction? switch to IM?). Acknowledgments. European LeukemiaNet, COFIN, Bologna University, BolognAIL Disclosures Gugliotta: Novartis: Consultancy; Bristol-Myers-Squibb: Consultancy. Castagnetti:Novartis: Consultancy; Bristol-Myers-Squibb: Consultancy. Breccia:novartis: Consultancy; BMS: Consultancy; Celgene: Consultancy. Abruzzese:Novartis: Consultancy. Martinelli:ARIAD: Consultancy; Pfizer: Consultancy; BMS: Consultancy, Speakers Bureau; Novartis: Consultancy, Speakers Bureau. Saglio:BMS: Consultancy, Fees for occasional speeches Other; Novartis: Consultancy, Fees for occasional speeches, Fees for occasional speeches Other; Pfizer: Consultancy, Fees for occasional speeches, Fees for occasional speeches Other; ARIAD: Consultancy, Fees for occasional speeches, Fees for occasional speeches Other. Baccarani:Novartis, BMS, Pfizer, Ariad: Consultancy, Honoraria, Speakers Bureau. Rosti:Novartis: Consultancy; Bristol-Myers-Squibb: Consultancy; Ariad: Consultancy; Pfizer: Consultancy.

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Beneficial Effects of Cytogenetic and Molecular Response on Long-Term Outcome in Patients with Newly Diagnosed Chronic Myeloid Leukemia in Chronic Phase (CML-CP) Treated with Imatinib (IM): Update from the IRIS Study.

Blood ◽

10.1182/blood.v106.11.166.166 ◽

2005 ◽

Vol 106 (11) ◽

pp. 166-166 ◽

Cited By ~ 22

Author(s):

Bengt Simonsson ◽

Keyword(s):

Blast Crisis ◽

Chronic Phase ◽

Risk Groups ◽

Low Risk ◽

Molecular Response ◽

Newly Diagnosed ◽

Long Term Outcome ◽

Increased Risk

Abstract Background: IM was proven to be superior to IFN+Ara-C for newly diagnosed pts with CML-CP (O’Brien et al, NEJM 2003). At 42-months of follow-up, 75% of the 553 pts randomized to IM remain on treatment. Of the 553 pts randomized to IFN+Ara-C only 4% are still on IFN+Ara-C. This update analysis is focused on IM pts. Methods: Evaluation included complete hematologic response (CHR), major/complete cytogenetic response (MCyR/CCyR) - defined as 0-35% Ph+ and 0% Ph+ metaphases respectively, major molecular response (MMR) - defined as ≥3 log reduction of bcr-abl transcripts from the standardized baseline, time to progression - defined as loss of CHR/MCyR or evolution to accelerated phase/blast crisis (AP/BC) or death due to any cause, time to AP/BC - defined as evolution to AP/BC or death due to CML, and overall survival. Results: With an average duration of 38 months of IM treatment, the best observed rates of CHR, MCyR and CCyR are 96%, 88% and 81%, respectively. Although the majority of MCyRs were achieved within the first 3 to 9 months, some pts achieved a MCyR and some even a CCyR after more than one year of treatment (Figure 1). The estimated MMR rate at 12 months is 40%. Figure 1 - Observed CHR, MCyR and CCyR during treatment with IM Figure 1 -. Observed CHR, MCyR and CCyR during treatment with IM The estimated progression-free rate at 42 months is 84%; additionally 94% are estimated free of progression to AP/BC (97% of the pts with CCyR and 73% of the pts without CCyR during study, p<0.001). The risk of relapse remains low with no apparent increased risk over time. The yearly hazard for progression to AP/BC is about 2% in each of the 4 years. The overall estimated survival at 42 months is 91% (considering all deaths). The estimated survival was lowest in pts with high risk Sokal score (84%) as compared to 91% in the intermediate risk pts and 94% in the low risk pts (p<0.001). Similarly, the best observed CCyR in the high, intermediate, and low risk groups were 69%, 80% and 88% respectively (p=0.002). In the subset of pts with CCyR the estimated survival at 42 months was 92%, 93% and 97% in the high to low risk groups (p=0.30), indicating that once pts achieve a CCyR, their survival is not significantly different between the Sokal risk groups. Of the 509 pts who were still on treatment at 12 months and had achieved a MCyR by then (n=436), the rate without progression to AP/BC at 42 months was 97% whereas it was only 83% for the 73 pts who did not achieve a MCyR at 12 months (p<0.001). The estimated survival rates at 42 months were 95% and 83% in these two response groups, respectively (p<0.001). Furthermore, for pts who had achieved a MMR at 12 months, the probability of remaining free from progression to AP/BC was 100% at 42 months compared to 95% for pts in CCyR but not in MMR, and 91% for pts not in CCyR at 12 months (p=0.0013). Conclusions: The follow-up confirms the beneficial effect of cytogenetic and molecular responses on long-term outcomes with IM. These results will be further updated using data cut-off of 31-July 2005 to reflect additional 12-months of data (i.e., 54-month follow-up).

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Frequency and Impact of Molecular Response’s with Nilotinib (Tasigna) in Patients (Pts) with Newly Diagnosed Philadelphia Chromosome (Ph)-Positive Chronic Myelogenous Leukemia in Early Chronic Phase (CML-CP)

Blood ◽

10.1182/blood.v124.21.3156.3156 ◽

2014 ◽

Vol 124 (21) ◽

pp. 3156-3156

Author(s):

Naval Daver ◽

Hagop M. Kantarjian ◽

Susan O'Brien ◽

Elias Jabbour ◽

Sherry Pierce ◽

...

Keyword(s):

Research Funding ◽

Cytogenetic Response ◽

Molecular Response ◽

Term Outcome ◽

Long Term Outcome ◽

Landmark Analysis ◽

Intent To Treat ◽

Dose Reductions

Abstract Background: Nilotinib is a BCR-ABL tyrosine kinase inhibitor with approximately 50-fold higher inhibitory activity than imatinib in preclinical studies. Aim: We initiated a phase II study (in 2005) to evaluate the efficacy of frontline nilotinib in pts with newly diagnosed CML-CP. The primary objective of this report was to estimate major molecular response (MMR) and complete molecular response (CMR: minimum 100,000 ABL copies) rates with prolonged follow-up, and the impact of MMR and CMR on long-term outcome. Methods: Pts with Ph-positive or BCR-positive CML in early CML-CP [i.e., time from diagnosis 12 months] with <1 month of prior interferon-alpha and/or imatinib were eligible. Nilotinib was initiated at a dose of 400 mg twice daily. Results for CCyR and MMR are reported as intent-to-treat unless specifically annotated as response among evaluable pts (eval). Results: 140 pts have been treated as of August 1, 2014. Herein we focus on the initial 109 pts who have a minimum follow-up of 12 months. The median (med) follow-up for these 109 pts is 52.2 months (range, 0.9 to 108.0+). The med age was 50 years (range, 17 to 86). 73% of pts had Sokal low risk. 17 (16%) had received imatinib for <1 months (med 18 days; range, 5 to 29 days). Overall, 92% (100/109) pts achieved a complete cytogenetic response [CCyR] with a med time to CCyR of 2.9 months (range, 2.1 to 8.1+). The rates of CCyR at 3, 6, 12 and 18 months were 80% (eval:83%), 86% (eval:95%), 83% (eval:99%), and 77% (eval:100%), respectively. Overall, MMR and CMR were achieved in 90% (98/109) and 45% (49/109) of the pts. Med time to MMR and CMR was 3.3 months (range, 2.4 to 48.0+) and 23.1 months (range, 3.2 to 86.0+), respectively. BCR-ABL/ABL at 3 months was <10% in 94% (eval:100%) and <1% in 89% (eval: 94%). BCR-ABL/ABL at 6 months was <1% in 81% (eval:89%) and <0.1% in 65% (eval:72%) in pts evaluated at these time points. MMR was observed in 65% (eval:72%) at 6 months, 71% (eval:87%) at 12 months, and 70% (eval:90%) at 18 months. CMR was observed in 9% (eval:11%) at 6 months, 14% (eval:17%) at 12 months, and 15% (eval:19%) at 18 months. We further analyzed the association between CCyR and molecular response (Table 1). For example, among the 84 pts who were in CCyR at 18 months: MMR was achieved in 90% of these pts including MR3 in 31%, MR4 in 13%, MR4.5 in 27%, and CMR in 19%. Estimated 3-year and 5-year overall survival (OS) is 98% and 91%, respectively. Estimated 3-year and 5-year failure-free survival (FFS) is 82% and 73%, respectively. On an intent-to-treat analysis the FFS among pts who achieved CMR was superior to those who did not achieve CMR (P<0.001, respectively). On a landmark analysis, which included only those pts who received nilotinib for a minimum of 24 months (med time to CMR among pts who achieved CMR=23.1 months) the FFS among pts who achieved CMR was superior to those who did not achieve CMR (P=0.008) (Figure 1). Dose-reductions were performed in 41 (38%) pts: 30 pts required 1 dose-reduction and 11 pts required 2 or more dose-reductions. The most frequent reasons for dose-reductions included increased liver enzymes (n=8), rash (n=5), pain/arthralgia (n=4), cardiac and QTc (n=4), fatigue (n=5), and neutropenia (n=2). The actual med dose remains 800 mg daily. 29 (27%) pts are off study due to toxicity in 8 (cardiac=3, liver enzymes=4, fatigue=1), inadequate response in 5 (3 never achieved adequate and 2 lost adequate response), progression to blast-phase in 3, death in 5 (all 5 non-CML related causes), 8 due to pt choice (financial=1, non-compliance=3, pt choice=1) Conclusion: Nilotinib 400 mg twice daily is very effective. The cumulative rates of CCyR, MMR and CMR were 92%, 90%, and 45%, respectively. CMR rates continue to improve with long-term follow-up. Attainment of CMR is associated with improved long-term outcome. Table 1: Molecular response rates among pts who achieve CCyR CCyR MR3 but not MR4 MR4 but not MR4.5 MR4.5 but not CMR CMR No MMR 3 months 87/105 (83%) 39/87 (45%) 5/87 (6%) 8/87 (9%) 2/87 (2%) 33/87 (38%) 6 months 94/99 (88%) 35/94 (38%) 6/94 (6%) 20/94 (21%) 10/94 (11%) 23/94 (24%) 12 months 90/91 (99%) 38/90 (42%) 3/90 (3%) 23/90 (26%) 15/90 (17%) 11/90 (12%) 18 months 84/84 (100%) 26/84 (31%) 11/84 (13%) 23/84 (27%) 16/84 (19%) 8/84 (10%) PCyr, partial cytogenetic response; Min, mimimal; Inev, inevaluable; IM, insufficient metaphase Figure 1: FFS CMR versus no CMR by landmark analysis for pts who received at least 24.0 months of nilotinib Figure 1:. FFS CMR versus no CMR by landmark analysis for pts who received at least 24.0 months of nilotinib Disclosures Daver: Novartis: Research Funding. Jabbour:Novartis: Advisory board membership Other, Research Funding. Cortes:Novartis: Advisory Board membership Other, Research Funding.

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Long-Term Outcome of Chronic Phase Chronic Myeloid Leukemia Patients Treated with Nilotinib Front-Line

Blood ◽

10.1182/blood-2020-139921 ◽

2020 ◽

Vol 136 (Supplement 1) ◽

pp. 44-45

Author(s):

Franck E Nicolini ◽

Vincent Alcazer ◽

Pascale Cony-Makhoul ◽

Stephanie Dulucq ◽

Sandrine Hayette ◽

...

Keyword(s):

Board Of Directors ◽

Research Funding ◽

Chronic Phase ◽

Molecular Response ◽

Newly Diagnosed ◽

Front Line ◽

Advisory Committees ◽

Long Term Outcome

Nilotinib (NIL) 600 mg daily has demonstrated its superiority over Imatinib 400 mg daily in terms of response and incidence of deep molecular response in the front-line chronic phase (CP) CML setting. In this observational study we have retrospectively analyzed the outcome of in- and out-study 202 patients (pts) treated in this setting with NIL 600 mg front-line, in "real-life" conditions. All pts with newly diagnosed adult CP-CML receiving NIL 300 mg BID alone front-line between 10/2007 and 06/2020, were eligible for this study. Data were retrospectively collected according to the current French regulations with pts' information. All pts were assessed and followed according to ELN recommendations 2003, 2006, and 2009 along treatment and to the recommendations from the French group of CML (D. Rea et al., Cancer 2018) in case of TFR. In this regard, a TKI was resumed if loss of MMR. All BCR-ABL1 assessments were performed in the 3 reference laboratories, standardised and expressed in % (IS) with ≥32,000 copies of ABL1 as control. The primary endpoints were the rate of molecular responses in the long-term and the (vascular) safety of Nilotinib. Secondary endpoints were the kinetics of molecular response, survival and safety of Nilotinib. Survival (OS, PFS & EFS) was defined according to ELN (J. Guilhot et al. Blood 2012). Two hundred and two patients were reported with 44% females and 56% males with a median age at diagnosis of 50.4 (17.5-83) years, and 26% of them had cardiovascular risk factors at onset (tobacco abuse 11%, hypercholesterolemia 9.3%, diabetes 1.45%, none with past history of cardiovascular events [CVE]). ELTS scores were high in 14%, intermediate in 31% and low in 55% of pts. Twenty-four (12%) pts harboured additional chromosomal abnormalities at diagnosis. The median follow-up after NIL initiation was 61.5 (1-147.5) months. At last follow-up 113 pts (55%) are not on NIL anymore for toxicities, TFR or resistance reasons. Twenty-eight (14%) pts present an arterial event on NIL (18% PAOD, 14% angina pectoralis, 7% myocardial infarction, 14% stroke, 47% others such as atrial fibrillation, cardiomyopathy...), that occurred after a median of 26 (0.6-98.5) months on NIL. Forty-six (22.5%) pts reached TFR criteria and stopped NIL after a median of 58.5 (27-126) months. The cumulative incidence (CI) rates of MMR at 1, 2 and 5 years were 64 (57-71)%, 79.4 (75.45-83.35)% and 95 (92-98.5)% respectively. For MR4, those were 35.5 (29-42)%, 60 (52-67)% and 82 (74.5-89)% respectively; and for MR4.5, were 14 (9-19)%, 31 (24-28)% and 62 (54-70.5)% respectively. The CI of sustained MR4.5 (i. e. patients eligible for TFR: MR4.5 ≥2 years) was observed in 30 (23-37)% at 3 years, 45.5 (36-55)% at 5 years and 52.5 (41.5-64)% at 6 years (Figure). The CI of patients entering TFR was 16.75 (10.5-23)% at 5 years and 51.94 (37.31-66.57)% at 10 years with a survival without MMR loss of 70.7 (58- 86)% at 1 year and 65.26 (50.6-84)% at 5 years. Nine (4.5%) pts progressed towards accelerated phase (4 pts) or BC (2 lymphoid, 3 myeloid) responsible for 5 deaths at latest follow-up. Among NIL resistant patients screened, 15 were harbouring ABL1 mutations (5 Y253H, 3 E255K, 3 T315I, 1 M244V, 1 G250E, 1 F359V, 1 V299L). Overall, 10 patients died (5 from CML, 5 from unrelated causes). The probability of OS was 95.75 [95%CI: 92.9-98.7]% at 2 years and 94.8 [91.5-98.3]% at 5 years, for PFS it was 94.92 [91.7-98.2]% at 2 years and 89.5 [84.7-94.6]% at 5 years, and EFS it was 78 [72.3-84]% at 2 years and 60.25 [53.3-68.1]% at 5 years. Regarding sustained MR4.5, univariate analysis showed that female gender (HR=2.46 [1.50-4.02], p<0.001) and low ELTS (HR=0.41 [0.22-0.76], p<0.004) had a significant impact, while multivariate analysis confirmed the role of these 2 factors (HR=2.31 [1.41- 3.79], p=0.001 and HR= 0.52 [0.30- 0.90], p=0.02) in addition to high ELTS (HR= 0.28 [0.14- 0.58], p<0.001). Univariate and multivariate analyses demonstrated that only age impacted on the CI of CVE (HR= 1.07 [1.04-1.10], p<0.001, and HR=1.07 [1.04-1.10], p<0.001). NIL first-line efficiently limits progression of newly diagnosed CP-CML patients and provides high rates of sustained MR4.5, allowing TFR in a substantial proportion of pts. However, the onset of arterial occlusive events, especially in the elderly is a matter of concern in the choice of this compound at treatment initiation. Disclosures Nicolini: Incyte: Research Funding, Speakers Bureau; Novartis: Research Funding, Speakers Bureau; Sun Pharma Ltd: Consultancy. Cony-Makhoul:BMS: Speakers Bureau; Incyte Biosciences: Speakers Bureau; Pfizer: Consultancy; Novartis: Consultancy; BMS: Consultancy. Dulucq:Incyte: Speakers Bureau; Novartis: Speakers Bureau. Cayuela:Novartis: Speakers Bureau; Incyte: Speakers Bureau. Rea:Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees; BMS: Membership on an entity's Board of Directors or advisory committees; Pfizer: Honoraria, Membership on an entity's Board of Directors or advisory committees; Incyte: Honoraria, Membership on an entity's Board of Directors or advisory committees. Mahon:ARIAD: Honoraria; Pfizer: Honoraria; Novartis Pharma: Honoraria, Research Funding; BMS: Honoraria. Etienne:Pfizer: Consultancy, Speakers Bureau; Incyte: Consultancy, Speakers Bureau; Bristol-Myers Squibb: Consultancy, Research Funding, Speakers Bureau; Novartis: Consultancy, Research Funding, Speakers Bureau.

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Sustained Durability of Responses Plus High Rates of Cytogenetic Responses Result in Long-Term Benefit for Newly Diagnosed Chronic-Phase Chronic Myeloid Leukemia (CML-CP) Treated with Imatinib (IM) Therapy: Update from the IRIS Study.

Blood ◽

10.1182/blood.v104.11.21.21 ◽

2004 ◽

Vol 104 (11) ◽

pp. 21-21 ◽

Cited By ~ 31

Author(s):

Francois Guilhot

Keyword(s):

Blast Crisis ◽

Chronic Phase ◽

Transcript Level ◽

Cytogenetic Response ◽

Molecular Response ◽

Newly Diagnosed ◽

Major Molecular Response ◽

First Line

IM has proven to be superior to IFN+Ara-C for newly diagnosed pts with CML-CP (O’Brien et al, NEJM, 2003). At 30-months of follow-up, 79% of pts randomized to IM remain on IM with 83% of them now treated for > 24 months. Therefore, this analysis is focused on first-line IM pts (n=553). Evaluation included complete hematologic response (CHR), major/complete cytogenetic response (MCyR/CCyR), major molecular response (≥3 log reduction in BCR-ABL/BCR vs. pooled diagnostic samples) time to progression (TTP) - defined as loss of CHR/MCyR or evolution to accelerated phase/blast crisis [AP/BC] or death, time to AP/BC, and overall survival. Median follow-up for first-line IM pts is 31.1. Summary of results are the following: 1st-line imatinib * 95% CI Best observed CHR/MCyR/CCyR (%) 95/87/79 Estimated major molecular response at 12 mos. (%) 40 Estimated cumulative MCyR % at 30 mos. 90 Estimated cumulative CCyR % at 30 mos. 82 Estimated % free of progression at 30 mos. 88 (85–91)* Estimated % free of AP/BC at 30 mos. 95 (93–97)* Estimated % survival at 30 mos. 95 (93–97)* The additional follow-up confirmed durable responses with first-line therapy while also demonstrating the effect of cytogenetic response on long-term outcomes. The estimated rate of confirmed responders remaining in response after achieving a CCyR at 30 months is >92%. Similarly, the estimated rate of patients still in response at 30 months after achieving either a MCyR or CHR is also >92% for both groups. Only 2% of pts with a confirmed loss of MCyR and 1% of the pts with a confirmed loss of CCyR subsequently progressed to AP/BC. Of these pts, 3 of 5 benefited from a dose increase to 600 or 800 mg of IM, while only 1 of 7 pts with a confirmed loss subsequently achieved a MCyR without a dose escalation. A total of 75 pts received a marrow transplant (BMT) after discontinuation from the study; 30 in the IM arm (2 after crossover from IFN) and 45 pts who were randomized to IFN (21 after crossover to IM). There was no difference in survival after BMT between pts who received first-line IM treatment (8 deaths, 1 after crossover) and pts who had received IFN+Ara–C (7 deaths) or IFN+Ara–C followed by IM (7 deaths) (p=0.78). The estimated survival at 12 months after BMT is 70%, 75%, and 68% respectively in the three groups. A landmark analysis showed that for 407 pts who achieved MCyR within 6 months, their estimated rate free of AP/BC at 30 months is 97% vs. 89% for the 124 pts who did not achieve this level of response at 6 months (p<0.001). Additionally, the estimated survival at 30 months for the same pts is 97% vs. 92% (p=0.0162). The achievement of a major molecular response at 12 months was also associated with improved progression-free survival. For patients who had achieved CCyR and a reduction in BCR-ABL transcript level ≥ 3 log at 12 months, the probability of remaining progression free was 100% at 30 months compared to 93% for such patients with reduction in BCR-ABL transcript level < 3 log and 82% for patients who were not in CCyR at 12 months (p<0.0001). These results will be further updated using a data cut-off of 31-July-04 to reflect additional 12-months of data (i.e., 42-month follow-up).

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IRIS 6-Year Follow-Up: Sustained Survival and Declining Annual Rate of Transformation in Patients with Newly Diagnosed Chronic Myeloid Leukemia in Chronic Phase (CML-CP) Treated with Imatinib.

Blood ◽

10.1182/blood.v110.11.25.25 ◽

2007 ◽

Vol 110 (11) ◽

pp. 25-25 ◽

Cited By ~ 25

Author(s):

Andreas Hochhaus ◽

Brian J. Druker ◽

Richard A. Larson ◽

Stephen G. O’Brien ◽

Insa Gathmann ◽

...

Keyword(s):

Adverse Events ◽

Blast Crisis ◽

Randomized Study ◽

Chronic Phase ◽

Cytogenetic Response ◽

Continuous Treatment ◽

Annual Rate ◽

Interferon Α

Abstract Background: The International Randomized study of Interferon versus STI571 (IRIS) study demonstrated that imatinib has superior safety and efficacy relative to interferon-α plus cytarabine (IFN+ara-C). Patients on the imatinib arm achieved an estimated 5-year OS of 89%. To monitor the long-term responses achieved by patients on imatinib, the 6-year follow-up of the IRIS patient population is summarized. Methods: 1106 patients were randomly assigned to either imatinib or IFN+ara-C and evaluated for hematologic and cytogenetic responses, event-free survival, progression to accelerated-phase (AP) or blast crisis (BC), overall survival (OS), and frequency of adverse events and discontinuations. Results: The downward trend in the risk of disease progression on imatinib has continued with a 0.4% event rate (including loss of response) and a 0% rate of transformation to AP/BC attained between years 5 and 6. Of 553 who were randomized to imatinib, 364 (65.8%) remain on study drug at 6 years: 14 (2.5%) crossed over to the IFN arm, and 175 (31.6%) pts have discontinued from imatinib study therapy for any reason. The following reasons were cited for discontinuation from the IRIS study: adverse events, 23 patients (4.2%); unsatisfactory therapeutic effect, 66 patients (11.9%); protocol violation, 15 patients (2.7%); withdrawal of consent, 32 patients (5.8%); administrative problems, 6 patients (1.1%); and 16 patients (2.9%) elected to undergo a stem cell transplantation (SCT). Death was the reason for discontinuation for 10 (1.8%) patients, and 7 patients (1.3%) were lost to follow-up. The best observed complete hematologic response rate among patients receiving first-line imatinib was 97%. The best observed major cytogenetic response (MCyR) and complete cytogenetic response (CCyR) rates were 89% and 83%, respectively, with 2 additional CCyR observed since the prior 5-year analysis. At the current 6-year follow-up, 325 patients are still in CCyR, another 24 had lost CCyR but regained it, 6 patients lost CCyR but remain in MCyR, and the remaining 9 patients never had a documented CCyR. Overall, an estimated 83% of patients were event-free, and 93% were free of progression to AP or BC at 6 years on imatinib study treatment, as patients were followed only for OS after discontinuation. After the second year on imatinib, the annual rate of events decreased every year, as did the annual relapse rate. Based on the current follow-up, a total of 66 (12%) patients have died (19 after SCT, 27 not due to CML). Estimated 6-year OS rate for all patients who received imatinib as initial therapy was 88%. When survival is censored at time of SCT for patients who proceeded to transplant, the estimated OS at 6 years is 91%. In an analysis of serious adverse events, no new safety issues were identified between the 5-year report and this analysis. Conclusions: The 6-year follow-up analysis of the IRIS population indicates that continuous treatment of chronic-phase CML with imatinib induces durable responses in a high percentage of patients with a decreasing rate of relapse and a favorable long-term safety profile.

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Reduction of BCR-ABL Transcript Levels at 6, 12, and 18 Months (mo) Correlates with Long-Term Outcomes on Imatinib (IM) at 72 Mo: An Analysis from the International Randomized Study of Interferon versus STI571 (IRIS) in Patients (pts) with Chronic Phase Chronic Myeloid Leukemia (CML-CP)

Blood ◽

10.1182/blood.v112.11.334.334 ◽

2008 ◽

Vol 112 (11) ◽

pp. 334-334 ◽

Cited By ~ 10

Author(s):

Timothy P Hughes ◽

Andreas Hochhaus ◽

Susan Branford ◽

Martin C Müller ◽

Letizia Foroni ◽

...

Keyword(s):

Cytogenetic Response ◽

The Other ◽

Molecular Response ◽

Long Term Outcomes ◽

First Line ◽

Available N ◽

Molecular Analyses ◽

Over Time ◽

Time Point

Abstract Background: An exploratory endpoint of the IRIS trial was measurement of BCR-ABL transcripts over time and its correlation with long-term outcomes. BCR-ABL measured by polymerase chain reaction (PCR) was required per protocol only after achievement of a complete cytogenetic response (CCyR). However, preplanned substudies occurred at sites in Germany and Australia who conducted PCR measurements on pts at intervals from the start of treatment independent of cytogenetic response (CyR). Additionally, other IRIS investigators contributed non-protocol specified molecular assessments. This first entire PCR dataset from IRIS assesses the prognostic value of molecular response (MR) at specific time points. Methods: 553 pts were enrolled onto the IM arm of IRIS; of these, 476 pts with at least one PCR measurement form the basis for this analysis. A major molecular response (MMR) is defined as the ratio of BCR-ABL/control gene (BAC) of ≤0.1%. Analyses were conducted at 6, 12 and 18 mo relating BAC percent reduction to event free survival (EFS), where events were defined as death during study treatment, loss of complete hematologic response, loss of Major CyR (MCyR), progression to accelerated phase (AP) or blast crisis (BC), or an increasing white blood cell count to > 20 × 109/L. Results: Among pts receiving first line IM for CML-CP, MMR was observed in 13% of samples available for study at 3 mo, 33% at 6 mo, 50% at 12 mo, 65% at 18 mo, 75% at 48 mo, 85% at 60 mo, and 86% at 72 mo. The degree of molecular response in pts who achieved CCyR is described in Table 1. This exploratory analysis demonstrates close correlation between CCyR and BAC ≤1% at 6 months and beyond. Table 1. Correlation of CCyR with molecular response at 3, 6, 12 and 18 mo. Time point Pts with CCyR and PCR samples available (n) CCyR and ≤0.1% BAC [MMR], n (%) CCyR and ≤1% BAC, n (%) 3 mo 51 17 (33%) 38 (75%) 6 mo 127 61 (48%) 114 (90%) 12 mo 177 110 (62%) 168 (95%) 18 mo 163 127 (78%) 154 (94%) At 6 mo, half of the pts with BAC >10% who also had a cytogenetic assessment at the same time had at least a partial cytogenetic response (PCyR) with an EFS of 91% at 72 mo, and 64% of these pts achieved MMR later. The other half of the pts with >10% BAC who did not have a PCyR at 6 mo had an EFS of 43%, and 31% later achieved MMR. A separate landmark analysis by CyR status alone showed EFS rates at 72 mo of 92% for pts in CCyR, 86% for pts in PCyR, 60% for Minor/Minimal CyR and 49% for No CyR. At 12 mo, pts with BAC ≤ 1% had excellent long term outcomes (72 month EFS of >90%, >95% without progression to AP/BC). Those pts with BAC > 1–≤ 10% (n = 36) had a 67% EFS, and 44% later achieved an MMR. These molecular analyses compare similarly to cytogenetic analyses alone (Baccarani et al; ASH 2006), with 60 mo EFS of 93% for pts in CCyR, 78% for pts in PCyR and 61% for pts without PCyR At 18 mo, pts with MMR could be statistically distinguished from pts with BAC >0.1–≤ 1%; EFS was 98% versus 89%, p=0.0137 (with 6 events in each group). The rate without AP/BC at 72 mo was not significantly different (with only 2 events in the >0.1 – ≤ 1% group). Baccarani et al (ASH 2006) reported an EFS at 60 mo of 96% for pts in CCyR, 80% for pts in PcyR and 69% for pts without PCyR. Table 2: Long-term outcomes (estimated rates at 72 mo) by MR levels at 6, 12 and 18 mo. BCR-ABL categories ≤0.1% (MMR) >0.1 −≤1% >1 −≤10% >10% *P=.0137. None of the other comparisons between MMR and > 0.1–≤1% BAC were statistically significant. 6 mo landmark N=86 N=89 N=44 N=39 EFS rate at 72 mo 90% 94% 88% 55% Without AP/BC at 72 mo 96% 100% 95% 74% 12 mo landmark N=153 N=90 N=36 N=26 EFS rate at 72 mo 94% 93% 67% 46% Without AP/BC at 72 mo 100% 96% 83% 76% 18 mo landmark N=164 N=48 N=25 N=16 EFS rate at 72 mo 98%* 89%* 67% 47% Without AP/BC at 72 mo 100% 96% 83% 82% Conclusion: In pts on first-line IM, MMR rates increase over time, and in pts who achieved an MMR at any time point progression is rare. Achievement of a CCyR correlated well with BAC of ≤1% from 6 mo onwards. Exploratory molecular analyses show pts with BAC >10% at 6 mo have EFS rates distinguishable by their cytogenetic status. At 12 mo, pts with a BAC > 1% or without CCyR, fare more poorly than those with BAC ≤ 1% or those in CCyR. At 18 mo pts with BAC ≤ 1% have excellent long term outcomes, with the best outcomes seen in those with BAC ≤ 0.1%. Molecular and cytogenetic evaluations are recommended until at least CCyR is achieved, with molecular assessments measured indefinitely thereafter.

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Nilotinib Versus High-Dose Imatinib in Early Chronic Phase CML Patients Who Have Suboptimal Molecular Responses to Standard-Dose Imatinib: Updated Data From RE-Nice Study

Blood ◽

10.1182/blood.v120.21.3775.3775 ◽

2012 ◽

Vol 120 (21) ◽

pp. 3775-3775 ◽

Cited By ~ 1

Author(s):

Soo-Young Choi ◽

Sung-Eun Lee ◽

Soo-Hyun Kim ◽

Eun-Jung Jang ◽

Jin-hwa Lee ◽

...

Keyword(s):

Dose Escalation ◽

Standard Dose ◽

Chronic Phase ◽

Cytogenetic Response ◽

High Dose ◽

Molecular Response ◽

Long Term Outcomes ◽

First Line

Abstract Abstract 3775 Background. In chronic myeloid leukemia (CML), achievement of optimal responses by time point has improved long-term outcomes. In contrast, several clinical studies investigating the clinical implications of suboptimal response showed that patients with suboptimal responses tend to have poor long-term outcomes. In IRIS study, patients who achieved major molecular response (MMR) at 18 months had event-free survival (EFS) benefit, compared to those who achieved complete cytogenetic response (CCyR) without MMR. However, the best treatment for these patients is still not confirmed. By the previous studies, sustaining standard-dose of imatinib (IM) is expected to yield less than 20 percent of additive MMR. In this prospective study, we investigated whether switching to nilotinib (NIL) or high-dose IM may be more effective for patients with suboptimal molecular response to IM as first-line therapy. Methods. Early chronic phase (CP) CML patients who have achieved CCyR but no MMR after at least 18 months and up to 24 months (≤ 18 to ≥24 months) on first-line IM therapy at a daily dose of 400 mg were enrolled in this clinical trial, and informed consents were obtained from all patients. In NIL arm, patients received oral dose of 400 mg BID (800 mg/day) and in high-dose IM arm, patients received 800 mg/day administrated as 400 mg BID. Primary endpoint is to evaluate the cumulative MMR rates by 12 months, and secondary endpoints are to evaluate the cumulative MMR, MR4.0 and undetectable molecular residual disease (UMRD) rates during further 24 month follow-up. Safety profiles will also be assessed. Patients showing lack of response (lack of complete hematologic response (CHR) at 6 months, increasing WBC, no major cytogenetic response (MCyR) at 24 months), loss of response (loss of CHR or MCyR) or severe intolerance to treatment were allowed to crossover to the alternative treatment. Results. With a data cut-off date of 10 Jul 2012, a total of 43 patients were randomized into NIL arm (n = 22) or high-dose IM arm (n = 21). With a median follow-up of 15 months (range, 1–36), all patients have maintained CCyR without progression to advanced disease, and progressive decrease in BCR-ABL1 transcript levels was observed in all patients. Cumulative incidence (CI) of MMR by 12 months showed no significant difference between NIL arm and high-dose IM arm (37.8 ± 11.9% vs 34.8 ± 10.6%, P = 0.789). In NIL arm, 3 in 22 (14%) and 2 in 22 (9%) patients achieved MR4.0 and UMRD, respectively, and in high-dose IM arm, 1 in 21 (5%) patients achieved MR4.0. Overall, the patients treated with high-dose IM showed toxicities more frequently, such as fatigue, dyspnea and decreased phosphate. In addition, 10 patients in high-dose IM arm have cross-over to NIL treatment due to lack of response (n=9) and intolerance (n=1), and the median duration of NIL treatment was 14 months (range, 7–26 months). Among them, 5 (50%) patients have achieved MMR with a median NIL treatment duration of 12 months (range, 3–18). Conclusions. These results demonstrate that early switching to NIL or dose escalation of IM could be recommended, considering the results of standard dose of IM in suboptimal molecular responders. When the tolerability of treatment was considered for switching to NIL or high-dose IM, NIL may be preferred. Through further clinical investigation on a large patient population and longer period observation, the efficacy and safety of early intervention of suboptimal molecular response using NIL or dose escalation of IM will be needed. Updated data with longer follow-up duration will be presented in the meeting. Disclosures: No relevant conflicts of interest to declare.

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Clinical Efficacy and Safety Of Dasatinib For Newly Diagnosed Chronic Myeloid Leukemia In Chronic Phase In Japan

Blood ◽

10.1182/blood.v122.21.1493.1493 ◽

2013 ◽

Vol 122 (21) ◽

pp. 1493-1493

Author(s):

Kohei Yamaguchi ◽

Kazunori Murai ◽

Shigeki Ito ◽

Tomoaki Akagi ◽

Kazuei Ogawa ◽

...

Keyword(s):

Chronic Myeloid Leukemia ◽

Myeloid Leukemia ◽

Chronic Phase ◽

Cytogenetic Response ◽

Molecular Response ◽

Newly Diagnosed ◽

Efficacy And Safety ◽

Major Molecular Response ◽

Once Daily

Abstract Background Dasatinib is a second-generation BCR-ABL inhibitor that has a 325-fold higher potency than imatinib and a 16-fold higher potency than nilotinib in vitro. The previous report from the global DASISION trial showed dasatinib resulted in significantly higher and faster rates of complete cytogenetic response (CCyR) and major molecular response (MMR) compared with imatinib. We conducted a phase II study to evaluate the efficacy and safety of dasatinib in patients with newly diagnosed chronic-phase chronic myeloid leukemia (CML-CP) in Japan. Methods Eighty newly diagnosed CML-CP patients were include in this study. Patients received dasatinib 100mg once daily. Treatment was continued until disease progression or unacceptable toxicity. Primary end point was the rate of major molecular response (MMR) by 12 months. MMR defined as a BCR-ABL transcript level of 0.1% or lower on the International scale by means of a real-time quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) in peripheral blood. Secondary end points were the rate of complete cytogenetic response (CCyR) by 12 months, the rate of MR4.5 (either (i) detectable disease with <0.0032% BCR-ABL1 IS or (ii) undetectable disease in cDNA with >32,000 ABL1 transcripts in the same volume of cDNA used to test for BCR-ABL1) by 12 months and adverse events of dasatinib (UMIN #000006358). Results Eighty newly diagnosed CML-CP patients were included in this study. All except one patient administered dasatinib 100 mg once daily. One patient was withdrawal before administration of dasatinib. So far, there were 71 patients with 6 months follow-up and 51 patients with 12 months follow-up. The estimated MMR rates were 69.5 % (95%CI, 58.7-80.3 %) by 6 months and 82.7% (95%CI, 73.0-92.4 %) by 12 months. The estimated MR4.5 rates were 27.1 % (95%CI, 16.7-37.5 %) by 6 months and 48.9% (95%CI, 36.0-61.7 %) by 12 months. Only 6 patients were withdrawal because of adverse event (5 patients) and ineffectiveness (1 patient). Conclusion Dasatinib treatment results in higher rates of molecular responses in newly diagnosed CML-CP patients in Japan. Dasatinib as the first-line agent might be acceptable for CML-CP patients because of better clinical efficacy and less toxicity. Disclosures: No relevant conflicts of interest to declare.

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Consolidation reduced dose whole brain radiotherapy (rdWBRT) following methotrexate, rituximab, procarbazine, vincristine, cytarabine (R-MPV-A) for newly diagnosed primary CNS lymphoma (PCNSL): Final results and long-term outcome.

Journal of Clinical Oncology ◽

10.1200/jco.2012.30.15_suppl.2006 ◽

2012 ◽

Vol 30 (15_suppl) ◽

pp. 2006-2006 ◽

Cited By ~ 1

Author(s):

Richard Charles Curry ◽

Denise Correa ◽

Jeffrey J. Raizer ◽

Sean Aaron Grimm ◽

Rose Lai ◽

...

Keyword(s):

Verbal Memory ◽

Primary Cns Lymphoma ◽

Cognitive Outcomes ◽

Cognitive Testing ◽

Cns Lymphoma ◽

Newly Diagnosed ◽

Long Term Outcome ◽

Early Results

2006 Background: After promising early results in the pilot phase (N= 30) reported by Shah 2007, we report on final results of a multicenter phase II study (N=52) in newly diagnosed PCNSL combining R-MPV-A and rdWBRT, expanded to address long-term disease control and cognitive outcomes in pts who actually received rdWBRT. Methods: Pts received 5 cycles of R-MPV (MTX dose: 3.5g/m2). Those with partial response (PR) received additional 2 cycles. Pts with a complete response (CR) after 5-7 cycles received rdWBRT (23.4 Gy), otherwise standard WBRT was offered (45 Gy). Consolidation cytarabine was given to all pts. Primary end-point was 2-y progression-free survival (PFS) in pts receiving rdWBRT (n=30 pts in CR required). Exploratory end-points included comprehensive neuropsychological testing, white matter changes (WMC) analysis (Fazekas scale) and apparent diffusion coefficient (ADC) on MRI. Results: Accrual was completed (N=52; 22 women); median (med) age= 60 (30-79); med KPS= 70 (50-100). In total, 31 (59%) pts were assessable for the primary endpoint (achieved a CR after induction and received rdWBRT). The 2-y PFS for this group was 78% (95% ci: 64%- 92%); med PFS= 7.7 y; the med OS was not reached (med follow-up= 6y); 3y-OS= 88% (ci 70-95); 5y-OS= 81% (ci 62-91). Cognitive testing showed improvement in executive function (P < 0.01) and verbal memory (P < 0.05) following induction chemotherapy; follow-up scores remained stable across the various domains. Minimal WMC developed in long term survivors: 36% of pts showed no change in Fazekas’ scores, 64% of pts developed scores 1 or 2 and no pt showed scores 3-6. The intent-to-treat (n=52) med PFS was 3.3y; med OS= 6.6 y. Differences in ADC values did not predict response (p=0.15), PFS (p=0.41) or OS (p=0.48). Conclusions: Consolidation rdWBRT is a highly effective and safe treatment for newly diagnosed PCNSL. Long term follow-up showed robust PFS and OS, comparable or superior to full dose WBRT, with excellent cognitive outcomes and no significant WMC over time. An RTOG randomized trial has been initiated comparing R-MPV-A with vs without rdWBRT.

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