Manifestation of Large Granular Lymphocyte Leukemia in Pediatric and Young Adult Population Is Distinct from Older Adult Cohorts

Abstract Introduction: Large Granular Lymphocyte (LGL) leukemia is a rare lymphoproliferative disorder usually manifested in elderly individuals, with mean age of onset at 65. However, LGL leukemia cases in pediatric and young adult (age <30) populations are occasionally observed. Severity of disease, response to routine LGL treatments (methotrexate, cyclophosphamide, cyclosporine), and molecular profiling of this cohort is largely unknown, with only a few case reports describing the occurrence. Here we present the first comprehensive analysis of pediatric and young adult LGL leukemia patients, where we compare demographic and hematologic parameters, frequency of STAT3 mutations, whole exome and transcriptomic profile, and treatment responses to the older adult (age >50) cohort. Methods: We retrospectively collected clinical data from 23 young adult (age <30), 105 adult (age 30-50), and 89 older adult (age >50) LGL leukemia patients. All participants signed informed consent to provide biospecimens and clinical records to the LGL Leukemia Registry. Whole exome (PBMC and saliva) and RNA sequencing (PBMC) was conducted on 115 patients. Sanger sequencing was utilized to determine STAT3 mutational status in the remaining 102 patients. Results: STAT3 is the most frequently mutated gene in LGL leukemia, and the mutation is associated with lower absolute neutrophil counts (ANC). We observed no differences in the frequency of STAT3 somatic mutations in young adult, adult, and older adult LGL leukemia (p=0.143). However, we detected a significant positive linear relationship between age of the patient and ANC values (p=0.002) for STAT3 mutant patients (Figure 1A). STAT3 wild-type (WT) patients did not display this relationship (p=0.756). No age associated trends were detected for hemoglobin values, although we detected decreasing red blood cell (RBC) values with increasing age for both STAT3 mutated and WT patients (p= 0.031, 0.010, respectively). No difference in sex (male vs female) balance was found within the young adult cohort (p=0.190). As rheumatoid arthritis (RA) is observed in ~30% of LGL leukemia patients, we asked if this prevalence also holds in the younger cohort. RA was observed in similar proportion in all young, adult, and older adult groups (p=1). To compare the severity of disease manifestation between the age groups, we first asked how many patients ever initiated LGL-related treatments in each age group. We found that patients under 50 are more likely to be on LGL related treatments compared to patients over the age of 50 (p=0.016) (Figure 1B). Next, we examined length of survival between age groups. Despite increased initiation of LGL related treatments, no statistically significant difference in overall survival (OS) was observed between patients under 50 and patients over the age of 50 (p=0.33) (Figure 1C). Therefore, we asked if the treatment response in younger patients is better compared to older patients. We observed no statistically significant differences in the routine LGL treatment responses between patients under 50 and patients over the age of 50 (p=0.732). Interestingly, epigenetic and chromatin modifier mutations are equally common in patients 50 years old and under relative to older adult patients (p= 0.271) (Figure 1D). Transcriptomic analysis of the PBMC data revealed enrichment of TNFα signaling in patients older than 50, while IFNα and IFNγ signaling was enriched in patients 50 years old and younger. Conclusions: We report the clinical and molecular analysis of LGL leukemia in pediatric/young adult and adult patients compared to the older adult patients that comprise the majority of LGL cases. We show that while STAT3 mutation frequency is similar across all age groups, younger patients with STAT3 mutation show lower ANC values compared to older patients. Importantly, we show that younger patients exhibit a more severe disease, as indicated by increased initiation of LGL treatment. However, overall survival in younger groups compared to older patients is not impacted. Finally, we show that younger patients display similar proportions of epigenetic and chromatin modifying mutations that are a prominent feature of older patients, and feature enrichment of IFNα and IFNγ signaling distinct from older patients. Figure 1 Figure 1. Disclosures Feith: Kymera Therapeutics: Membership on an entity's Board of Directors or advisory committees. Loughran: Dren Bio: Membership on an entity's Board of Directors or advisory committees; Keystone Nano: Membership on an entity's Board of Directors or advisory committees; Bioniz Therapeutics: Membership on an entity's Board of Directors or advisory committees; Kymera Therapeutics: Membership on an entity's Board of Directors or advisory committees.

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Comparison of Outcomes of Haploidentical Peripheral Blood Stem Cell Transplantation with Post-Transplant Cyclophosphamide in Older Versus Younger Patients

Blood ◽

10.1182/blood-2020-141966 ◽

2020 ◽

Vol 136 (Supplement 1) ◽

pp. 27-27

Author(s):

Giacomo Adoncecchi ◽

Ambuj Kumar ◽

Rawan Faramand ◽

Hien D. Liu ◽

Farhad Khimani ◽

...

Keyword(s):

Board Of Directors ◽

Older Patients ◽

Research Funding ◽

Chronic Gvhd ◽

Age Groups ◽

Group Versus ◽

Survival Outcomes ◽

Advisory Committees ◽

Younger Patients ◽

Two Age Groups

Introduction: Previous studies have demonstrated that allogeneic haploidentical (haplo) peripheral blood stem cell transplantation (PBSCT) with post-transplant cyclophosphamide (PTCy) yields improved progression free survival (PFS) when compared to haplo bone marrow transplant (BMT) with PTCy, attributable to lower relapse without an increase in non-relapse mortality (NRM) (Bashey, et al. JCO. 2017). However, haplo PBSCT results in higher rates of graft-versus-host disease (GVHD) which may negate these benefits in older patients who are more susceptible to transplant related toxicity. Thus, evaluation of the outcomes of haplo PBSCT with PTCy in older patients is warranted. Methods: We retrospectively evaluated 121 adult patients with hematologic malignancies treated at the Moffitt Cancer Center with allogeneic T-cell replete PBSCT from a haplo donor followed by PTCy-based GVHD prophylaxis. Data were extracted from the Moffitt BMT Research & Analysis Information Network (BRAIN) database. Myeloablative (n=70, 58%) and reduced intensity (n=51, 42%) conditioning regimens were included. Transplant related outcomes were compared between two age groups: <60 years (n=66) versus >60 years (n=55). Associations with transplant related survival outcomes were assessed using univariate and multivariate Cox proportional hazard survival models. Fine and Gray regression models were used to assess associations of transplant related endpoints with competing risks. Kaplan-Meier curves and cumulative incidence function curves were also plotted. Results: The median age at the time of transplant was 42 years (range: 20-59) for the younger group and 66 years (range: 61-75) for the older group. The median follow-up was 17 months (range: 2-53) for the entire cohort. Younger patients were more likely to receive myeloablative conditioning (83% versus 27%, p<0.001). Baseline characteristics were otherwise similar. Neutrophil engraftment (>500/uL) by day 30 did not differ significantly between the younger and older group (98% versus 93%, p=0.26). However, the median time to neutrophil engraftment was faster in the younger group versus the older group (16 versus 21 days, p<0.001). Platelet engraftment (>20,000/uL) by day 90 was achieved in 92% in the younger group versus 76% in the older group (p=0.03). The time to platelet engraftment was faster in the younger group: 28 days versus 36 days (p=0.006). At day 100, the cumulative incidence (CuI) of grade II-IV acute GVHD in younger patients was 42% (95% CI 29-61%) and for older patients was 35% (95% CI 22-55%, p=0.82). The CuI for grade III-IV acute GVHD for the younger and the older groups were 8% (95% CI 4-25%) and 15% (95% CI 7-38%, p=0.23), respectively. At 2 years, the CuI of chronic GVHD was 67% (95% CI 55-82%) for younger patients versus 56% (95% CI 38-82%) for older patients (p=0.20). NRM for the younger group and the older group, respectively, was 6% (95% CI 2-16%) versus 19% (95% CI 11-34%) at 100 days and 14% (95% CI 6-30%) versus 22% (95% CI 13-37%) at 2 years (p=0.17). The CuI of relapse at 2 years was not significantly different between the two age groups, with the younger recipients having a CuI of 42% (95% CI 20-60%) and the older group 31% (95% CI 17-56%, p=0.70). The 2-year DFS was similar between the younger and older group, respectively: 51% (95% CI 36-66%) and 53% (95% CI 37-70%, p=0.72). Similarly 2-year overall survival (OS) for the younger group was 59% (95% CI 44-74%), while the older group was 66% (95% CI 52-80%, p=0.92). In multivariate analysis, NRM was superior in the younger group (HR=0.31, 95% 0.12-0.82, p=0.02). Otherwise, age was not associated with engraftment, risk of acute or chronic GVHD, relapse, DFS, or OS. Conclusion: Our results demonstrate that outcomes following allogeneic haplo PBSCT with PTCy in patients >60 years approximate outcomes in patients <60 years. While NRM was inferior in the older patient group, this difference did not result in significant differences in long term OS or DFS. Instead, other variables such as the hematopoietic comorbidity index and the disease risk index were better indicators of survival outcomes. Additionally, these survival outcomes with haplo PBSCT with PTCy appear to be similar to prior published data with haplo BMT with PTCy in older patients (Kasamon, et al. JCO. 2015). Based on this study, haplo PBSCT with PTCy is an appropriate transplant platform for elderly patients. Disclosures Khimani: Bristol Myers Squibb-Moffitt-Alliance: Research Funding. Nishihori:Novartis: Other: Research support to institution; Karyopharm: Other: Research support to institution. Pidala:Syndax: Consultancy, Membership on an entity's Board of Directors or advisory committees; CTI Biopharma: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Novartis: Research Funding; Takeda: Research Funding; Janssen: Research Funding; Johnson and Johnson: Research Funding; Pharmacyclics: Research Funding; Abbvie: Research Funding; BMS: Research Funding. Bejanyan:Kiadis Pharma: Membership on an entity's Board of Directors or advisory committees.

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Breaking the Glass Ceiling of Age in Transplant in Multiple Myeloma

Blood ◽

10.1182/blood-2019-124804 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 782-782 ◽

Cited By ~ 3

Author(s):

Pashna N. Munshi ◽

Parameswaran Hari ◽

David H. Vesole ◽

Artur Jurczyszyn ◽

Jan Zaucha ◽

...

Keyword(s):

Multiple Myeloma ◽

Board Of Directors ◽

Older Patients ◽

Research Funding ◽

Age Groups ◽

Karnofsky Performance Score ◽

Age Group ◽

Advisory Committees ◽

Younger Patients ◽

Equity Ownership

Background: Autologous hematopoietic cell transplantation (AHCT) is an effective treatment to achieve deep and durable remission in multiple myeloma (MM). Typically, AHCT is offered to patients <70 years of age, although the median age of diagnosis of MM is 70 years. We compared the outcomes of upfront AHCT across age groups for newly diagnosed MM in the era of novel therapies using the Center for International Blood and Marrow Transplant Research (CIBMTR) database. Methods: We analyzed the outcomes of 15,999 MM patients aged 20 years and older from the USA who received a single AHCT with melphalan conditioning within 12 months of diagnosis between 2013 and 2017 and reported to the CIBMTR. Multivariate analysis was performed for non-relapse mortality (NRM), relapse/progression (REL), progression-free survival (PFS) and overall survival (OS) using Cox proportional hazards model with age at transplant in decades as the main effect. Hazard ratio (HR) with 95% confidence intervals (CI) are reported. Because of the large sample size, a p-value of <0.01 was considered significant a priori. Results: Table 1 shows patient, disease and treatment characteristics by age group at diagnosis. All age groups had similar distribution of gender, race, ethnicity, Karnofsky performance score (KPS), comorbidity index (HCT-CI), stage III by Durie-Salmon/International Staging System. There was a higher proportion of high-risk cytogenetics in patients ≥70 years (30%), compared to age group 40-49 years (24%) and 20-39 years (20%) in this population. Older patients were more likely to be White compared to younger patients: 85% ≥70 compared to 64% 20-39 years. While 82% of the overall population received melphalan 200 mg/m2, 58% of the ≥70% received Mel 140 mg/m2. There were more ASCT performed in the ≥70-year age group in 2017 (28%) compared to 2013 (15%). Univariate outcomes by age groups shown in Table 2 revealed that 100-day NRM was higher in ≥70 years at 1% compared to younger patients (p <0.01) and 2-year OS was lower in ≥70 years at 86 (85-88)% compared to 60-69 years, 89 (88-89)% (p<0.01). When adjusted for other variables (Table 3), compared to reference age group of 60-69 years, patients ≥70 had similar NRM (HR 1.3, 95% CI 1, 1.7, p 0.06), REL (HR 1.03, 95% CI 0.9, 1.1, p 0.6), PFS (HR 1.06, 95% CI 1, 1.2, p 0.2), and OS (HR 1.2, 95% CI 1, 1.4, p 0.02). The leading cause of death across all age groups was primary disease. Among the ≥70 years cohort, melphalan dose was a surrogate for worse outcomes including NRM at 100 days (Mel 140, 1 (1-2)% vs Mel 200 0 (0-1)%, p 0.003, PFS at 2 years Mel 140 64 (60-67)% vs Mel 200 69 (66-73)%, p 0.003, and OS at 2 years (Mel 140 85 (82-87)% vs Mel 200 89 (86-91)%, p 0.01) (Figure). Conclusions: This is the largest study of AHCT in older adults with MM. More MM patients ≥70 years are being transplanted in the US over time. While our data may highlight referral and access biases regarding which older patients may be referred for ASCT, our results confirm that patients ≥70 years can undergo transplant safely and achieve similar benefits as 60-69 years' old patients. Our results also suggest that melphalan 200 mg/m2 may be given safely in the ≥70 years population. While melphalan conditioning dose 140 mg/m2 in the ≥70 group is associated with worse outcomes, this is likely a surrogate for higher frailty and comorbidities in this cohort of patients. Our analysis confirms that AHCT has similar benefits in terms of disease control (REL and PFS) in both young and older MM patients. This benefit is seen even in a contemporaneous era where proteasome inhibitors and/or immunomodulator drugs are used in upfront treatment. Thus, AHCT remains a safe consolidation therapy across all age groups of MM patients. Disclosures Hari: Celgene: Consultancy, Honoraria, Research Funding; Takeda: Consultancy, Honoraria, Research Funding; BMS: Consultancy, Research Funding; Janssen: Consultancy, Honoraria; Kite: Consultancy, Honoraria; Amgen: Research Funding; Spectrum: Consultancy, Research Funding; Sanofi: Honoraria, Research Funding; Cell Vault: Equity Ownership; AbbVie: Consultancy, Honoraria. Kumar:Janssen: Consultancy, Research Funding; Takeda: Research Funding; Celgene: Consultancy, Research Funding. Shah:Poseida: Research Funding; Bristol-Myers Squibb: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Nkarta: Consultancy, Membership on an entity's Board of Directors or advisory committees; Kite: Consultancy, Membership on an entity's Board of Directors or advisory committees; Celgene, Janssen, Bluebird Bio, Sutro Biopharma: Research Funding; University of California, San Francisco: Employment; Genentech, Seattle Genetics, Oncopeptides, Karoypharm, Surface Oncology, Precision biosciences GSK, Nektar, Amgen, Indapta Therapeutics, Sanofi: Membership on an entity's Board of Directors or advisory committees; Indapta Therapeutics: Equity Ownership; Amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Teneobio: Consultancy, Membership on an entity's Board of Directors or advisory committees. Qazilbash:Genzyme: Other: Speaker; Bioclinical: Consultancy; Amgen: Consultancy, Other: Advisory Board; Autolus: Consultancy. D'Souza:EDO-Mundapharma, Merck, Prothena, Sanofi, TeneoBio: Research Funding; Prothena: Consultancy; Pfizer, Imbrium, Akcea: Membership on an entity's Board of Directors or advisory committees.

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Comparison of Peripheral Blood Stem Cell Mobilization for Multiple Myeloma Patients over 70 Years of Age with Younger Patients

Blood ◽

10.1182/blood-2018-99-117498 ◽

2018 ◽

Vol 132 (Supplement 1) ◽

pp. 4554-4554

Author(s):

Ning Dong ◽

David S Siegel ◽

Phyllis McKiernan ◽

Noa Biran ◽

Alan P Skarbnik ◽

...

Keyword(s):

Board Of Directors ◽

Older Patients ◽

Research Funding ◽

Age Groups ◽

Disease Status ◽

Cell Yield ◽

Disease Stage ◽

Age Group ◽

Advisory Committees ◽

Younger Patients

Abstract Background: Autologous stem cell transplantation (ASCT) is increasingly offered to older patients with multiple myeloma (MM) based on clinical trials demonstrating improved outcome. Inherently, successful mobilization and collection of peripheral blood stem cells (PBSC) is necessary for ASCT. A direct comparison of the efficacy of mobilization between elderly and younger patients has not been reported. Retrospective studies demonstrated that older patients had lower CD34+ cell yield and a higher incidence of mobilization failure (Lee et al 2014, Muchtar et al 2016). In this retrospective study, we compared two age groups (>/=70 years and <70 years) in MM patients who received ASCT at the John Theurer Cancer Center. We compared the outcomes of PBSC mobilization and transplantation between the two groups. Methods: MM patients who received a single ASCT at our institution between 2005 and 2016 were included. More than 95% of patients received either cyclophosphamide-based chemotherapy with GCSF (CY-GCSF) or plerixafor with GCSF (Pleri-GCSF) and were included in the analysis. We identified 111 patients aged >/= 70 years and 315 patients <70 years. The total CD34+ cell yield, number of apheresis sessions and CD34+ yield per session were compared by age group and mobilization regimen using the student's t-test. Multivariate analysis was performed using the general linear model with age group, mobilization regimen, age and mobilization agent interaction, Durie-Salmon (DS) stage, disease status at mobilization, and mobilization within 12 months of diagnosis as covariates. Progression-free survival (PFS) and overall survival (OS) were compared using Cox proportional hazard model with the above-mentioned covariates. All analyses were done using SAS 9.4. Results: Patient characteristics and CD34+ cell yield by age group are summarized in Table 1. The majority of patients in both groups underwent mobilization within one year of diagnosis. Older patients were less likely to receive CY-GCSF and more likely to receive Pleri-GCSF compared to younger patients (p<0.001). Disease status at mobilization, time from diagnosis to mobilization and DS stage were not associated with choice of mobilization regimens (p>0.05 for all). The two groups had similar number of apheresis sessions regardless of mobilization regimen. When receiving Pleri-GCSF, the two age groups had similar CD34+ yield per apheresis (4.4x10e6 /kg and 3.9x10e6 /kg for age>/=70 and age<70, respectively, p=0.49). However when receiving CY-GCSF, the older patients had lower CD34+ yield per apheresis compared to the younger patients (5.4 x10e6 /kg and 7.5 x10e6 /kg, respectively, p=0.004). When comparing the CD34+ yield per session within the older cohort, the yields with CY-GCSF and Pleri-GCSF were similar (p=0.16). In the multivariate analysis including all patients, time from diagnosis to mobilization, disease stage and disease status at mobilization were not associated with CD34+ yield per session or total CD34+ yield. Neither age nor mobilization regimen was associated with PFS or OS, after adjusting for disease stage and disease status at ASCT (Table 2, Figure 1, Figure 2). Conclusions: CD34+ yield was comparable between younger patients and older patients receiving plerixafor + GCSF. In contrast, the CD34+ yield was lower in the older patients receiving cyclophosphamide + GCSF. The cause of the difference is not clear and warrants further study. The PFS and OS were comparable between the two groups after ASCT. The choice of mobilization regimen did not affect survival. We have previously advocated cyclophosphamide mobilization in most patients because of the higher CD34+ yield and lower cost compared to plerixafor + GCSF (Panchal et al., ASH 2017). However this study showed that the CD34+ yield was not significantly different for patients aged 70 years or older in response to the different mobilization regimens. It is reasonable to consider plerixafor + GCSF in the elderly when chemotherapy toxicity is of concern. Disclosures Siegel: Karyopharm: Consultancy, Honoraria; Celgene: Consultancy, Honoraria, Research Funding, Speakers Bureau; Merck: Consultancy, Honoraria, Speakers Bureau; Janssen: Consultancy, Honoraria, Speakers Bureau; Amgen: Consultancy, Honoraria, Speakers Bureau; Novartis: Honoraria, Speakers Bureau; Takeda: Consultancy, Honoraria, Speakers Bureau; BMS: Consultancy, Honoraria, Speakers Bureau. Biran:Amgen: Consultancy, Speakers Bureau; Merck: Research Funding; Celgene: Consultancy, Honoraria, Speakers Bureau; BMS: Research Funding; Takeda: Consultancy, Speakers Bureau. Skarbnik:Gilead Sciences: Honoraria, Speakers Bureau; Abbvie: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Genentech: Honoraria, Speakers Bureau; Pharmacyclics: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Jazz Pharmaceuticals: Honoraria, Speakers Bureau; Seattle Genetics: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Novartis: Honoraria, Speakers Bureau.

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Patient Characteristics and Outcomes in Adolescents and Young Adults (AYA) with Acute Myeloid Leukemia (AML): Princess Margaret Cancer Centre Experience

Blood ◽

10.1182/blood-2019-125449 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 2609-2609

Author(s):

Muhned Alhumaid ◽

Georgina S Daher-Reyes ◽

Wilson Lam ◽

Arjun Law ◽

Tracy Murphy ◽

...

Keyword(s):

Board Of Directors ◽

Older Patients ◽

Myeloid Leukemia ◽

Research Funding ◽

Age Groups ◽

Treatment Strategies ◽

Patient Characteristics ◽

Cancer Center ◽

Advisory Committees ◽

Disease Behavior

Introduction: Clinical outcomes of acute myeloid leukemia (AML) in adolescents and young adults (AYA) are rarely reported as an isolated subgroup. Treatments vary little across age groups, and treatment intensity depends upon comorbid conditions and performance status. Optimal treatment strategies focused on disease behavior, biological factors, and the distinct needs of this subset of AML patients remain elusive. The purpose of this retrospective analysis is to determine the characteristics and outcomes of AYA AML patients treated at a specialized adult leukemia cancer center in comparison to older adults with AML (40-60 years). Methods: A retrospective analysis was performed on all patients treated at Princess Margaret Cancer Center from 2008-2018. Patients with acute promyelocytic leukemia were excluded. Clinical characteristics, treatment strategies, and survival outcomes were recorded for all patients. Overall survival (OS) and disease-free survival (DFS) rates were calculated using the Kaplan-Meier product-limit method and the impact of covariates were assessed using the Log-rank test. Finally, we compared the outcomes of AYA patients treated at our centre between 2015-2018 with older patients. Results: A total of 175 patients aged 18-39 were identified. Patient characteristics are shown in (Table 1). Cytogenetic were available in 163 patients. Based on MRC criteria, 27 (16%) were favorable risk, intermediate in 95 (54%), adverse in 39 (22%), and missing/failed in 14(8%). NPM1 status was available in 110 patients of whom 38 (35%) were positive. FLT3-ITD was available in 67 patients with 24 (36%) positive. Both mutations were present in 13 (54%) patients. There were no significant differences in terms of risk stratification based on cytogenetic and molecular markers based on age (18-29 vs.30-39) (P= 0.98). Most patients 172 (98%) received induction, 157 (91%) with 3+7, and 15 (9%) with FLAG-IDA. Complete remission (CR) was achieved in 133 (77%) after first induction [120 (76%) after 3+7 and 11 (73%) after FLAG-IDA]. Induction related mortality was low (2%). Of the 39 who did not achieve CR, thirty-four patients received re-induction (13 FLAG-IDA, 16 NOVE-HiDAC, 5 others) with CR in 21 (62%). Overall, 154 (89.5%) achieved CR1. Sixty-four (42%) proceeded to hematopoietic stem cell transplantation (HSCT) in CR1. 59 (38%) patients relapsed in CR1 with 8 (12%) relapsing post HSCT. Fifty-five (5 post HSCT) patients received reinduction with 30 (51%) (2 after HSCT) achieving CR2. Fifteen patients received HSCT in CR2. OS and DFS at 2 years were 62% (95% CI 0.53-0.69) and 50% (95% CI 0.41-0.57), respectively. Stratified by cytogenetic risk, OS was 81% for favorable risk, 61% for intermediate, and 50% for adverse risk (P=0.0001), respectively. DFS in these groups was 85%, 57%, and 46 % (P=0.0025), respectively. We further compared outcomes in the 18-29y and 30-39y age groups. The OS was 61.9% compared to 62.5% (P=0.91) and DFS of 52.1% compared to 47% (P=0.65) respectively. On univariate analysis for OS and DFS, cytogenetic risk stratification was the only significant variable (P=0.0004 and P=0.0042). We then compared the outcomes 67 sequential patients aged I8-39 treated from 2014-2018, with those of 176 sequential patients aged 40-60 treated during the same period (table 2). OS at 2 years was not statistically higher in the younger group compared to the older group (66.7% vs. 61.2%, P=0.372). While relapse rate was lower in older patients (15.5% vs. 22.6%, P=0.093), NRM was higher in older patients (29.7% vs. 18.8%,P=0.094). Conclusion: AYA pts. occupy a unique niche amongst AML as a whole. While treatment responses have improved in general, there may be potential for further gains in these patients. Increased tolerance for more intense treatment strategies as well as the incorporation of novel agents into standard treatment protocols may provide a means to optimize care in AYA patients. Finally, research is needed to elucidate biological mechanisms and predictors of disease behavior instead of arbitrary, age-stratified treatment schema. Disclosures McNamara: Novartis Pharmaceutical Canada Inc.: Consultancy. Schimmer:Jazz Pharmaceuticals: Consultancy; Medivir Pharmaceuticals: Research Funding; Novartis Pharmaceuticals: Consultancy; Otsuka Pharmaceuticals: Consultancy. Schuh:Astellas: Honoraria, Membership on an entity's Board of Directors or advisory committees; AbbVie: Honoraria, Membership on an entity's Board of Directors or advisory committees; Pfizer: Honoraria, Membership on an entity's Board of Directors or advisory committees; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees; Teva Canada Innovation: Honoraria, Membership on an entity's Board of Directors or advisory committees; Amgen: Honoraria, Membership on an entity's Board of Directors or advisory committees; Agios: Honoraria; Jazz: Honoraria, Membership on an entity's Board of Directors or advisory committees. Maze:Pfizer Inc: Consultancy; Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees. Yee:Astellas: Membership on an entity's Board of Directors or advisory committees; Millennium: Research Funding; Takeda: Membership on an entity's Board of Directors or advisory committees; Astex: Research Funding; Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Merck: Research Funding; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; MedImmune: Research Funding; Pfizer: Honoraria, Membership on an entity's Board of Directors or advisory committees; Hoffman La Roche: Research Funding. Minden:Trillium Therapetuics: Other: licensing agreement. Gupta:Incyte: Honoraria, Research Funding; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees; Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Sierra Oncology: Honoraria, Membership on an entity's Board of Directors or advisory committees.

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The Global aHUS Registry: Characteristics of 826 Patients with Atypical Hemolytic Uremic Syndrome

Blood ◽

10.1182/blood.v126.23.4640.4640 ◽

2015 ◽

Vol 126 (23) ◽

pp. 4640-4640

Author(s):

Christoph Licht ◽

Gianluigi Ardissino ◽

Gema Ariceta ◽

David J. Cohen ◽

Christoph Gasteyger ◽

...

Keyword(s):

Hemolytic Uremic Syndrome ◽

Board Of Directors ◽

Research Funding ◽

Atypical Hemolytic Uremic Syndrome ◽

Age Groups ◽

Adult Patients ◽

Employment Equity ◽

Advisory Committees ◽

Uremic Syndrome ◽

Equity Ownership

Abstract Background: Atypical hemolytic uremic syndrome (aHUS) is a rare, genetic, life-threatening disease predominantly caused by chronic, uncontrolled complement activation that leads to thrombotic microangiopathy and renal and other end-organ damage. The aHUS Registry, established in April 2012, is an observational, noninterventional, multicenter, global initiative to collect information on patient outcomes regardless of treatment approach. It facilitates availability of follow-up data for eculizumab. Methods: Patients with clinical diagnoses of aHUS (irrespective of identified complement abnormality or treatment) are eligible. Demographic, medical/disease history, and treatment outcomes data are collected at enrollment and prospectively thereafter. Results: By June 30, 2015, 826 patients enrolled (Table). Overall, 54.7% of patients, including 45.1% of pediatric and 62.7% of adult patients, were female. Patients were most commonly enrolled after their first TMA event. Thrombosis occurred more frequently in adult than pediatric patients. Nonrenal conditions, including gastrointestinal, cardiovascular, central nervous system, and pulmonary, were common in both age groups and occurred in 11.0%‒20.3% overall. Eculizumab was administered to 57.3% of patients, of whom 87.3% were treated prior to enrollment. Conclusions: Registry baseline characteristics demonstrate differences between pediatric and adult patients with aHUS, notably frequencies of thrombosis. Nonrenal conditions are frequent in both age groups. Ongoing and future analyses will further enhance understanding of aHUS history and progression. Additional clinical sites are encouraged to enroll patients to facilitate knowledge acquisition and optimization of patient care and quality of life. Disclosures Licht: Alexion Pharmaceuticals: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Achillon: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. Ardissino:Alexion Pharmaceuticals: Honoraria, Membership on an entity's Board of Directors or advisory committees. Ariceta:Alexion Pharmaceuticals: Consultancy, Membership on an entity's Board of Directors or advisory committees. Cohen:Astellas: Consultancy; Alexion Pharmaceuticals: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Novartis: Consultancy; Merck: Consultancy; Genentech: Research Funding. Gasteyger:Alexion Pharma International SàRL: Employment, Equity Ownership. Greenbaum:Alexion Pharmaceuticals: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. Ogawa:Alexion Pharmaceuticals: Employment, Equity Ownership. Kupelian:Alexion Pharmaceuticals: Employment, Equity Ownership. Schaefer:Alexion Pharmaceuticals: Honoraria, Membership on an entity's Board of Directors or advisory committees. Vande Walle:Alexion Pharmaceuticals: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Frémeaux-Bacchi:Alexion Pharmaceuticals: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees.

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HESTER: A Phase II Study Evaluating Efficacy and Safety of Tisagenlecleucel Reinfusion in Pediatric and Young Adult Patients with Acute Lymphoblastic Leukemia Experiencing Loss of B-Cell Aplasia

Blood ◽

10.1182/blood-2020-136340 ◽

2020 ◽

Vol 136 (Supplement 1) ◽

pp. 23-24

Author(s):

Michael W Boyer ◽

Sonali Chaudhury ◽

Kara L Davis ◽

Timothy Alan Driscoll ◽

Stephan A Grupp ◽

...

Keyword(s):

T Cell ◽

Young Adult ◽

B Cell ◽

Board Of Directors ◽

Research Funding ◽

Adult Patients ◽

Efficacy And Safety ◽

Advisory Committees ◽

T Cell Therapy ◽

Car T

Background: Tisagenlecleucel is an anti-CD19 chimeric antigen receptor (CAR)-T cell therapy approved for pediatric and young adult patients with relapsed/refractory (r/r) B-cell acute lymphoblastic leukemia (B-ALL) and adult patients with r/r diffuse large B-cell lymphoma. The ELIANA trial showed efficacy (81% overall remission rate [ORR]; 60% complete remission [CR]) and safety of tisagenlecleucel in r/r B-ALL (Maude et al. N Engl J Med. 2018). In the ELIANA trial, sustained remissions were associated with B-cell aplasia, an expected on-target effect of tisagenlecleucel and a pharmacodynamic marker for tisagenlecleucel persistence. In some patients who demonstrated short CAR-T cell persistence, reinfusion with 1 or more additional doses of tisagenlecleucel has restored B-cell aplasia and produced a 60% CR rate in patients who were reinfused with humanized CD19-targeted CAR-T cell therapy (Maude et al. J Clin Oncol. 2016). This prolongs the period of tisagenlecleucel activity and immunosurveillance and may therefore prolong durable remission. We introduce a trial in progress investigating the efficacy and safety of tisagenlecleucel reinfusion in pediatric and young adult patients with B-ALL experiencing a loss of B-cell aplasia. Study Design and Methods: HESTER (NCT04225676) is a phase II, open-label, multicenter trial to determine the efficacy and safety of tisagenlecleucel reinfusion in pediatric and young adult patients with B-ALL experiencing loss of B-cell aplasia. Eligible patients must be ≤25 years of age with a confirmed diagnosis of CD19(+) leukemia. Patients must have been previously infused with commercial tisagenlecleucel and have at least 1 additional dose of commercial tisagenlecleucel prescribed to them in the course of medical practice. Commercial tisagenlecleucel must be given for reinfusion within 9 months of the initial manufacturing date. Patients must have loss of B-cell aplasia defined as peripheral blood (PB) absolute B lymphocyte count ≥50/μL or PB B lymphocyte ≥10% of the total lymphocytes; patients are not required to be minimal residual disease negative (MRD)(-). Karnofsky (age ≥16 years) or Lansky (age <16 years) performance status must be ≥50 at screening. Patients treated with prior gene/adoptive T-cell therapy other than tisagenlecleucel and patients with active central nervous system involvement by malignancy are excluded. The primary efficacy endpoint is the proportion of patients who reestablish B-cell aplasia within 12 months of reinfusion as measured by circulating B lymphocytes (<50/μL) and presence of tisagenlecleucel cells by quantitative polymerase chain reaction (qPCR) in the PB. Secondary outcomes include the ORR (CR + CR with incomplete blood count recovery) during the 12 months post reinfusion, event-free survival, overall survival, MRD status, and safety; immunogenicity and tisagenlecleucel persistence (by qPCR) are exploratory endpoints. Subgroup analysis of efficacy outcomes will include patients with a loss of B-cell aplasia within 9 months of first infusion who are MRD(+) at time of enrollment, as well as patients with very early (<3 mo), early (≤3 to <6 mo), and later (≥6 mo) loss of B-cell aplasia following first infusion. Safety will be assessed throughout the trial. For the primary analysis, a minimum of 10% of patients reestablishing B-cell aplasia within 12 months after reinfusion is expected with an estimated true rate of 25%. All secondary and exploratory variables will be summarized descriptively. Estimated enrollment is about 54 patients in the United States. Clinical Trial Information: NCT04225676 Disclosures Boyer: Thunder Biotech Inc: Consultancy. Grupp:Servier: Research Funding; Cellectis: Other; Roche: Consultancy; Adaptimmune: Other: SAB; Jazz: Other: SSC; TCR2: Other: SAB; GlaxoSmithKline: Consultancy; CRISPR Therapeutics/Vertex Pharmaceuticals: Other; Juno/BMS: Other; Janssen/JnJ: Consultancy; Humanigen: Consultancy; CBMG: Consultancy; Kite/Gilead: Research Funding; Allogene: Other; Novartis: Consultancy, Other: SSC, Research Funding. Hermiston:Novartis: Membership on an entity's Board of Directors or advisory committees; Sobi: Membership on an entity's Board of Directors or advisory committees. Kovacs:Novartis: Current Employment. Magley:Novartis: Current Employment. Myers:Novartis: Consultancy, Honoraria, Other: ELIANA trial Steering Committee, Speakers Bureau. Phillips:Novartis: Membership on an entity's Board of Directors or advisory committees. Pulsipher:Bellicum: Honoraria; Mesoblast: Honoraria; Miltenyi: Honoraria, Research Funding; Adaptive: Research Funding; Novartis: Honoraria; Jasper: Honoraria. Purkayastha:Novartis: Current Employment. Willert:Novartis: Current Employment.

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Tolerance and Response to Initial Systemic Therapy In Older Patients with Follicular Lymphoma (FL): Observations From 186 Unselected Recent Cases In the Practices of US-Based Medical Oncologists (MOs).

Blood ◽

10.1182/blood.v116.21.3842.3842 ◽

2010 ◽

Vol 116 (21) ◽

pp. 3842-3842

Author(s):

Neil Love ◽

Stephanie A. Gregory ◽

Bruce D. Cheson ◽

Myron S. Czuczman ◽

Melanie Elder ◽

...

Keyword(s):

Side Effects ◽

Board Of Directors ◽

Older Patients ◽

Age Groups ◽

Treatment Selection ◽

Phase Iii ◽

Published Data ◽

Advisory Committees ◽

Presenting Symptoms ◽

The Impact

Abstract Abstract 3842 Background: Advanced-stage FL is generally considered incurable, but the disease often responds to systemic anticancer treatment (SAT). A number of factors influence the selection of a specific SAT, which must be administered judiciously to older patients, particularly those with known comorbidities. A paucity of information exists to document which SATs are chosen for this population in clinical practice and the resultant clinical outcomes. We attempted to address this issue by aggregating and examining clinical information on individual patients receiving initial treatment for FL. Methods: US community-based MOs were recruited from a database of past participants in our CME activities to provide anonymous information on the presenting symptoms, diagnostic workup, treatment selection, side effects and clinical antitumor responses for all patients in their practices with a new diagnosis of FL since January 1, 2008. Modest, per-patient honoraria were provided to each MO for this work. Results: From April 14 to July 9, 2010, 38 MOs entered a total of 186 cases of FL into a web-based data bank (minimum 1 case, maximum 15, median 4.5). The median age was 66, with 45% under age 65, 26% from 65 to 74 and 29% age 75 and older. 53% of the patients were women. 42% of patients were minimally symptomatic or asymptomatic at diagnosis (Table 1), and across each of the three age groups the presence of various symptomology was similar. A number of SATs were initiated, including R-CHOP (26%), RCVP (25%), and rituximab monotherapy (13%). 15% of patients were observed without SAT. For patients first treated in 2010, an increase in the use of bendamustine/rituximab was observed, representing 8 of 26 patients (31%) versus 3 out of 80 patients (4%) in 2009. The choice of regimen differed by age, with, for example, more R-CHOP (37%) used for patients under age 65 and more R-CVP (38%) and rituximab monotherapy (28%) selected for patients age 75 and older. Overall, these treatments resulted in complete clinical responses in 57% of patients and “things went very well with expected or fewer toxicities” in 58%. These outcomes are similar to what has been reported in published data from randomized Phase III trials of these regimens. No major differences were observed in the levels of efficacy and side effects between the three age groups (Table 1). Conclusions: This unselected case series produced, in a rapid manner, information addressing a variety of clinical issues in newly diagnosed FL, including the impact of age on treatment selection and resultant outcomes. These data suggest that MOs are able to individualize SATs for older patients and match the short-term outcomes and tolerability of the therapies selected for younger patients. This risk-benefit differential is of particular palliative importance as this dataset demonstrates a majority of patients present with clinically significant tumor-related symptoms at diagnosis. Additional work of this kind is needed to better understand how physicians adjust the dose and schedule of SATs to prevent and ameliorate toxicity, particularly in older patients. Disclosures: Gregory: Cephalon Inc: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Amgen Inc: Consultancy; Genentech BioOncology: Consultancy, Speakers Bureau; Novartis Pharmaceuticals: Consultancy; Spectrum Pharmaceuticals: Consultancy. Cheson:Celgene Corporation: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Cephalon Inc: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; GlaxoSmithKline: Membership on an entity's Board of Directors or advisory committees; Millenium Pharmaceuticals Inc: Membership on an entity's Board of Directors or advisory committees; Pfizer Inc: Membership on an entity's Board of Directors or advisory committees. Czuczman:Amgen Inc: Membership on an entity's Board of Directors or advisory committees; Biogen Idec: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Celgene Corporation: Membership on an entity's Board of Directors or advisory committees; Cephalon Inc: Membership on an entity's Board of Directors or advisory committees; Genentech BioOncology: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; GlaxoSmithKline: Membership on an entity's Board of Directors or advisory committees; Lilly USA LLC: Membership on an entity's Board of Directors or advisory committees; Millenium Pharmaceuticals Inc: Membership on an entity's Board of Directors or advisory committees; Novartis Pharmaceuticals Corporation: Membership on an entity's Board of Directors or advisory committees.

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Higher Incidence of Secondary AML and Adverse Molecular Markers, Together with Lower CR and Higher AML Related Death Rates in Elderly Compared to Younger Patients: Results from 2435 Patients Included in the Two German AML Intergroup Studies

Blood ◽

10.1182/blood.v126.23.2517.2517 ◽

2015 ◽

Vol 126 (23) ◽

pp. 2517-2517

Author(s):

Dietger Niederwieser ◽

Verena Sophia Hoffmann ◽

Utz Krug ◽

Rainer Krahl ◽

Christina Sauerland ◽

...

Keyword(s):

Older Patients ◽

Research Funding ◽

De Novo ◽

Age Groups ◽

Disease Status ◽

Study Group ◽

Advisory Committees ◽

Younger Patients ◽

Secondary Aml ◽

De Novo Aml

Abstract Background The German AML Intergroup conducted two randomized studies in younger (<60 years) and elderly (≥60 years) patients in which the study arms were compared to a common standard arm. Here, we compared the two studies in younger and elderly patients focusing on disease characteristics and outcome. Patients and Methods The East German Study Group (OSHO) and the Acute Myeloid Leukemia Cooperative Group (AMLCG) each entered patients from 18 to 59 years into one study and patients aged 60 years and older into another. Each study group randomized upfront 10% of all AML patients into a common standard arm and 90% in the study group specific arm. All patients with de novo AML or AML after myelodysplastic syndrome or cytotoxic treatment were eligible. Chi-squared and Mann-Whitney-U tests were used to detect significant differences between the age groups regarding demographic, clinical and cytogenetic characteristics at baseline. Complete Remission (CR) at 90 days and cumulative probabilities of death were determined for outcome. To avoid bias due to the higher probability of death in older patients, cumulative probabilities of death were calculated for relapsed patients or those who did not achieve CR after 90 days. Other deaths were considered as a competing risk. Results A total of 2435 AML patients were analyzed, 1132 in the study <60 years and 1303 in the study ≥60 years. Significant differences in patient characteristics were noted between the studies. The elderly patient group contained a higher proportion of males than the younger group (55% vs 49% respectively, p=0.0031) and a higher percentage of secondary AML (40% vs 21% respectively, p<0.0001). In contrast, younger patients had higher median WBC count [13x109/L (range 0.03-798) for <60 years and 6.9x109/L (range 0.23-450) for ≥60 years, p<0.0001] and higher median lactate dehydrogenase [442U/L (range 35-19,624) for <60 years and 350U/L (range 51-9,486) for ≥60 years, p<0.0001]. Cytogenetic risk was similarly distributed in both groups (favorable: 12% in both age groups, intermediate: 66% in <60 years and 63% in ≥60 years, adverse: 22% in <60 years and 25% in ≥60 years, p=0.1672). However, the favorable combination of FLT3-ITDwt and NPM1mut in normal karyotype was more common in the younger (35%) than in the older group (27%; p=0.0212). A higher rate of CR at 90 days was observed in the younger (66%) than in the older (51%) patients (p=<0.0001). Of the younger patients 14.8% died (3.8% with persisting AML, 3.3% without AML and 7.7% without evaluable disease status) while of the older patients 21.8% died (6.2% with persisting AML, 2.5% without AML and 13.1% without evaluable disease status) during this period (p=0.0001). Relapse at 90 days was seen in 1% of the younger and in 2% of the older patients. The cumulative probability of AML-related death was lower in younger patients than in older patients (p<0.0001). Of the younger patients 29% (95% CI: 26% to 31%) and 44% (95% CI: 40% to 46%) died after one and three years due to AML; in the older group the corresponding frequencies were 45% (95% CI: 42% to 48%) and 62% (95% CI: 59% to 65%; Figure 1a). The probability of dying from AML was lowest for the younger patients with de novo AML [27% (95% CI 24% to 29%) at 1 year and 41% (95% CI 38% to 44%) at 3 years] and highest for those with secondary AML [38% (95% CI 32% to 44%) at 1 year and 56% (95% CI 49% to 62%) at 3 years (p=0.0001)], with similar differences being observed in the older patients (p=0.0001, Figure 1b). In the younger patients, CR at 90 days was lower in the standard (58%) than in the study arm (66%, p=0.0558), while AML related death was 29% and 27% at 1 year and 44% and 39% at 3 years respectively. In the older patients CR at 90 days was 52% vs. 51%, AML related death at 1 year 45% and 45% and at 3 years 63% and 69% for study arm and standard arm, respectively (Figure 1c). Conclusion This analysis reveals significant differences in gender, laboratory characteristics and proportion of secondary AML in elderly compared to younger AML patients. While there was no clear difference in cytogenetic risk groups, favorable molecular markers were more frequent in younger patients. Clear differences in CR rates after 90 days of therapy and AML related death rate were seen in regard to age (<60 years and ≥60 years) and disease type (de novo and secondary AML). As the common standard arm in both of the studies was age adapted, the differences between the two age groups are likely to be related to disease biology. Disclosures Niederwieser: Novartis: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Hoffmann:Novartis Oncology Europe: Research Funding. Krug:Sunesis; Clavis Pharma; usa Pharma, Catapult Cell Therapy, Gilead, Roche: Membership on an entity's Board of Directors or advisory committees; Sunesis: Speakers Bureau; Boehringer Ingelheim: Research Funding; Novartis; BMS; Roche; Boehringer Ingelheim; Bayer: Honoraria. Hegenbart:Janssen: Honoraria, Other: travel support. Pfirrmann:Novartis Pharma: Consultancy, Honoraria; BMS: Consultancy, Honoraria. Kraemer:TEVA: Other: travel support. Al-Ali:Celgene: Honoraria, Research Funding; Novartis: Consultancy, Honoraria, Research Funding.

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Molecular Genetics and Prognosis in Younger Patients with Chronic Lymphocytic Leukemia (CLL)

Blood ◽

10.1182/blood-2019-125426 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 3025-3025

Author(s):

Daniel Helbig ◽

Ghaith Abu Zeinah ◽

Erica B Bhavsar ◽

Richard R. Furman ◽

John N. Allan

Keyword(s):

Prognostic Factors ◽

Board Of Directors ◽

Molecular Genetics ◽

Older Patients ◽

Categorical Variables ◽

Genetic Mutations ◽

Advisory Committees ◽

Younger Patients ◽

Tp53 Mutations ◽

The Difference

Background: While CLL is commonly diagnosed in older patients, there are ~15% of patients diagnosed at ages younger than 50. Several past studies have investigated differences in clinical parameters and treatment outcomes in younger patients with CLL, including a shorter time to first treatment (TTFT) among younger patients (Parikh et al. 2014). However, few studies have reported on the genetic mutational differences between younger and older cohorts. To bridge this gap, we investigated the mutational landscape between younger and older patients and evaluated the clinical outcome TTFT, hypothesizing that our younger cohort of patients would associate with higher risk lesions and behave more aggressively. Methods: We conducted a single center retrospective database review of 557 patients diagnosed with CLL from 1980 to 2019 who underwent whole exome profiling between 2015 to 2019 with a lymphoid specific 75-gene next generation sequencing (NGS) panel (Genoptix Inc). A Pearson's chi-square test was used to compare categorical variables between groups and a Wilcoxon rank sum test was used to compare medians. The TTFT was estimated using Kaplan-Meier methods, and the difference between groups was compared using the log-rank test. Multivariate regression using a Cox proportional hazards model was used to compare TTFT between groups independent of well-accepted clinical risk factors for treatment initiation. Results: Of the 557 patients who underwent NGS testing, 92 (16.5%) were younger than 50 years old with a median age of 44.9 years old compared to a median age of 62.7 years old in the 465 (83.5%) patients older than 50 years old. There was no difference between the two groups with regards to previous treatment prior to NGS testing with 29.2% in the older patients and 26.1% in the younger patients having previously been treated (p=0.63). The median time from CLL diagnosis to initial NGS testing was 5.2 years in the younger cohort vs. 3.2 years in the older cohort (p=0.04). There were no differences in baseline prognostic factors between younger and older patients, including Rai stage, IGVH status, CD38 positivity, ZAP70 expression, and cytogenetic abnormalities. We found a lower frequency of TP53 mutations in younger compared to older patients (6.5% vs 15.7%, p=0.03) but otherwise found no differences in any other genetic mutations between the two groups, including NOTCH1, FAT1, ATM, and SF3B1 (Table 1). There was a longer TTFT in younger patients with a median TTFT of 7.61 years compared to 4.42 years in older patients (p=<0.001) (Figure 1). The difference in TTFT was independent of TP53 mutation status in a multivariate analysis. Conclusions: We found no enrichment of specific genetic mutations in younger versus older patients except a lower prevalence of TP53 mutations in our younger patient population. We found younger patients have a longer TTFT, which is contrary to previous studies that have identified younger age as a negative prognostic marker. Future research is needed to determine why younger patients in our cohort appear to have a more indolent disease course in terms of TTFT despite similar baseline prognostic factors and molecular genetics to older patients. Disclosures Furman: Acerta Pharma: Consultancy; Genentech: Consultancy; Incyte: Consultancy; AstraZeneca: Consultancy; Abbvie: Consultancy; Beigene: Consultancy; TG Therapeutics: Consultancy; Sunesis: Consultancy; Oncotracker: Consultancy; Janssen: Consultancy; Pharmacyclics: Consultancy; Verastem: Consultancy. Allan:AbbVie, Inc: Consultancy, Membership on an entity's Board of Directors or advisory committees; Acerta Pharma: Consultancy; Genentech: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Pharmacyclics LLC, an AbbVie company: Consultancy; Bayer: Consultancy; Sunesis Pharmaceuticals: Consultancy, Membership on an entity's Board of Directors or advisory committees; Janssen: Consultancy, Honoraria; Verastem Oncology, Inc.: Consultancy, Membership on an entity's Board of Directors or advisory committees.

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Older Adults with Chronic Myelogenous Leukemia (CML), During the Tyrosine Kinase Inhibitor (TKI) Era, Can Be Successfully Treated with Reduced Intensity Conditioning (RIC) Hematopoietic Cell Transplant (HCT) Using Sibling or Unrelated Donors: A Center for International Blood and Marrow Transplant Research (CIBMTR) Analysis

Blood ◽

10.1182/blood.v118.21.494.494 ◽

2011 ◽

Vol 118 (21) ◽

pp. 494-494

Author(s):

Erica D Warlick ◽

Brian McClune ◽

Tanya L. Pedersen ◽

Kwang W Awn ◽

Joseph H. Antin ◽

...

Keyword(s):

Overall Survival ◽

Board Of Directors ◽

Older Patients ◽

Age Groups ◽

Advisory Committees ◽

Age Cohorts ◽

Gvhd Prophylaxis ◽

Age Cohort ◽

Unrelated Donors ◽

Conditioning Intensity

Abstract Abstract 494 The introduction of tyrosine kinase inhibitors (TKI) and advent of RIC and non-myeloablative (NMA) conditioning hematopoietic cell transplants (HCT) have changed and the therapeutic strategy for patients with CML. We analyzed the post HCT outcomes of CML patients aged 40 and older undergoing RIC/NMA HCT in 2001–2007. Detailed information regarding pre HCT TKI use or rationale for timing of transplant was not available; however, the analysis time period captures the entry of TKIs into clinical practice. Outcomes were compared between age cohorts of 40–49, 50–59, and ≥ 60 years. Overall survival (OS), Day +100 acute graft versus host disease (aGVHD) grades II-IV, chronic (cGVHD), transplant-related mortality (TRM), relapse, and disease-free survival (DFS) were analyzed with multivariate analysis testing the impact of age, gender, disease status at HCT (CP1vs. CP2/accelerated phase (AP) vs. blast phase (BP), sex match, HLA match, GVHD prophylaxis, and conditioning intensity (RIC versus NMA as described by Bacigalupo et all 2009) on outcomes. A total of 306 CML patients underwent HCT at 125 centers: 117 (38%) aged 40–49; 119 (39%) aged 50–59; and 70 (23%) aged ≥ 60. At HCT most patients in the 40–49 age cohort were in CP1 (72%), while only 44% of patients aged 50–59 and 31% aged ≤ 60 were in CP1. Interval from diagnosis to HCT for CP1 patients was similar across age groups with a large percentage of each age cohort undergoing HCT ≥ 2 years (32%, 40%, and 45%, respectively). Sibling donors were the stem cell source for 56% of those aged 40–49; older cohorts had a higher percentage of unrelated donors (58 and 60%, respectively). Primarily peripheral blood grafts (78%, 80% and 90%) and RIC (78%, 76% and 70%) were used across age groups, respectively. GVHD prophylaxis was similar. Three year OS and cGVHD, Day +100 grade II-IV acute GVHD, and 1 year TRM were similar in all age cohorts. Three year relapse incidence increased and DFS decreased with age. Importantly in analysis of CP1 patients only, relapse and DFS were similar in each age cohort.Table 1:Univariate AnalysisOutcomeAge 40–49 Probability (95% CI)Age 50–59 Probability (95% CI)Age ≥ 60 Probability (95% CI)P-valueEntire CohortOSA54% (44–64)52% (42–61)41% (30–54)0.26aGVHDB II-IV26% (18–34)32% (24–40)32% (21–43)0.53cGVHDA58% (47–68)51% (41–61)43% (33–55)0.19TRMC18% (11–26)20% (13–27)13% (6–22)0.43RelapseA36% (27–46)43% (34–52)66% (53–77)0.001DFSA35% (26–45)32% (24–41)16% (7–27)0.01CP1 OnlyRelapseA34% (23–46)42% (28–56)51% (29–72)0.40DFSA43% (31–55)36% (23–51)39% (19–61)0.81A=3 year; B=Day +100; C=1 year Multivariate analysis confirmed the significant adverse impact of advanced CML (AP/CP2+ and BP) at HCT, NMA conditioning intensity, male gender, and older age on relapse and DFS. Overall survival was not impacted by age, but was significantly worse with advanced CML at HCT. (Table 2)Table 2:Multivariate AnalysisOutcomeRR95% CIP valueRelapse:Age:10.69–1.6420.000340–491.0641.441–3.60750–592.28≥60Disease Status:10.1319–0.9170.01CP11.3350.0036–1.403AP/CP2+2.823BPConditioning Intensity10.222–0.469<0.0001NMA0.323RICGender10.397–0.830.0032Male0.574FemaleOverall SurvivalAge:10.55–1.2260.4240–490.8210.683–1.61850–591.051≥60Disease Status:11.206–2.47<0.0001CP11.7263.199–10.0740.42AP/CP2+5.677BPGender:10.0189–0.4810.019Male0.671Female These data indicate that HCT is safe in older patients with CML with equivalent acute and chronic GVHD, TRM, and OS across age cohorts. Relapse increased in patients receiving NMA conditioning and in those aged 60 and above; most of whom had advanced disease. However, for HCT during CP1 relapse risks and DFS were similar, regardless of age. Allogeneic HCT using RIC conditioning for older patients with CP1 CML can control relapse with acceptable toxicity and survival. Comparison of outcomes with second line TKI versus HCT are as yet unreported but these favorable findings indicate appropriate consideration of HCT for older patients with CML. Disclosures: Gupta: Incyte: 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.

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