ALBERT

Description: Background: Autologous chimeric antigen receptor (CAR) T cell therapy has shown to be effective in relapsed or refractory (R/R) diffuse large B cell lymphoma (DLBCL) but requires in real world and in Europe at least a 4 weeks period of cell processing. During this "bridging period", patients are vulnerable to disease progression and complications. We sought to characterize bridging therapy strategies. Methods: We performed a retrospective review of patients (pts) with R/R DLBCL treated with commercialized CD19 CAR T cells, either Axicabtagene Ciloleucel (Yescarta) or tisagenlecleucel (Kymriah). Bridging therapy (BT) was defined by any therapy given from enrolment to cell infusion. We divided bridging therapy in 2 groups: high intensity BT (HI, including chemotherapy+/-immunotherapy) and low intensity BT (LI, including monoclonal antibodies rituximab, brentuximab, dexamethasone, lenalidomide). We evaluated toxicity (cytokine releasing syndrome (CRS), CAR-related encephalopathy syndrome (CRES), infections) and efficacy (OS, PFS) after infusion according to the intensity of the BT. Results: 46 pts were enrolled for commercialized CAR T cells (Kymriah n=25, Yescarta n=21) including R/R DLBCL (n=35), TFL (n=5) or PMBL (n=6) between June 2018 and April 2019. The median age was 57 (IQR, 42 to 64). Number of pts with aaIPI 〉 2 was 20. The median number of previous lines was 3 (range 3-5), including 15 autologous stem cell transplants and 2 allotransplants. Median time between enrollment and infusion, and between collection and infusion were 59 (35 to 118) and 40 (32 to 90) days, respectively. Overall, 30 (65%) pts received a HI and 16 (35%) a LI or no bridging therapy. Median number of BT cycles was 2 (range, 1-4). 13 patients had various regimen because of uncontrolled disease. Pts receiving HI presented at enrollment with more elevated LDH (60% vs 31%), more involved extranodal sites (n〉 2, 32% vs 0%), higher IPI (〉2, 77% vs 43%, p=.049), and higher total metabolic tumor volume (TMTV) measured on FDG PET/CT (median, 90 vs 10, p=.002). After BT, 44 pts were infused. 2 pts died before infusion because of a pulmonary infection (n=1) and a lymphoma progression (n=1), both in the HI group. At infusion response evaluation showed that 25 (57%) pts progressed during BT, without difference in the HI or the LI groups (61 % vs 50%). Median TMTV in HI and LI was 95 (10 -256) vs 18 (8 - 44), respectively. After CAR T infusion, 14 pts (32%) developed an infectious disease (7 in the LI group, 7 in the HI group, p=0.31). Median duration of neutropenia (PNN 〈 1000) was 8 days, 7 in the LI and 9 in the HI (p= 0.21). In the LI and HI groups, 11 and 19 pts developed a CRS (0 grade 3-4), 1 and 11 pts developed a CRES (1 and 3 grade 3-4), respectively. The HI/LI did not impact the occurrence of CRS (p=1.00) but that of CRES (p=0.03). Pts with abnormal LDH (p=0.02), high number of courses (p=0.03) or PS〉0 (p=0.049) had a higher risk of CRS, whereas patients with high IPI (p=0.03), and high values of CRP (P=0.02) or decreased albumin levels (p=0.008) had a higher risk of CRES. After CAR T cells infusion, with a median follow up of 5.7 months, the median PFS was not reached in the LI group, and was of 3 months in the HI group (p=0.06). The median OS was not reached in the LI group, and was of 12.5 months in the HI group (p=0.09). In multivariate analyses, IPI was predictor of better PFS, whereas low IPI and TMTV were predictors of better OS. No evidence of any effect of intensity of the BT on OS or PFS was observed in these multivariate analyses. Conclusion: The type of bridging therapies was very heterogeneous. Its intensity was closely related to tumor burden at enrolment. There was no significant difference in terms of efficacy between the HI and LI groups, but a higher frequency of CRES in the HI group. Disclosures Paillassa: Janssen: Other: Bibliography board with young hematologists. Di Blasi:Novartis: Honoraria. Thieblemont:Roche: Honoraria, Research Funding; Gilead: Honoraria; Novartis: Honoraria; Kyte: Honoraria; Janssen: Honoraria; Celgene: Honoraria; Cellectis: Membership on an entity's Board of Directors or advisory committees.

Description: Introduction: The autologous anti-CD19 chimeric antigen receptor (CD19 CAR) T-cells demonstrated significant clinical benefits and a manageable safety profile in patients with relapsed/refractory diffuse large B-cell lymphoma (R/R DLBCL), with an ORR of 52-83% and CR of 40-58% in the 3 pivotal clinical trials (ZUMA-1, TRANSCEND-NHL-001, JULIET), leading to a rapid approval in third line R/R DLBCL in Europe and in USA. The CD19 CAR T-cells Axicabtagene and Tisagenlecleucel have been approved in France since June 2018 for patients with DLBCL, primary mediastinal B-cell lymphomas (PMBL) and transformed FL (tFL), recurrent or refractory after 〉 2 systemic therapy lines. However, all patients are not deemed eligible for such therapy. Here we describe the characteristics of the non-eligible patients and the causes of non-eligibility for CD19 CAR T-cells at our center. Methods: We performed a retrospective analysis of all patients for whom our center was contacted for potential eligibility to CD19 CAR T-cells. Upon each request, a screening form was completed by the referring hospital to validate the indication (DLBCL, PMBL or tFL; recurrent or refractory to 〉 2 systemic therapy lines) and the absence of contra-indications (CNS involvement (MRI mandatory), active infection). The patient was then evaluated in our hospital to check the predetermined eligibility criteria: age, comorbidities, LVEF 〉 45%, no pericarditis or cardiogram abnormality, creatinine clearance 〉 60 mL/min, ALT/AST 〈 2.5 N, total bilirubin 〈 1.5 mg/dL, no pleural effusion, SpO2 〉 92% without oxygen, lymphocytes 〉 100/µL, no rapid progressive disease (compressive mass, PS 〉 2 or rapid increase of LDH), or no active neurological/auto-immune disease. In case of severe comorbidities or age〉 70, patient's frailty index was assessed by an ICU physician. Eligibility was then finally validated by our local board through a careful case-by-case analysis. Results: Between June 2018 and July 31, 2019, 221 requests were analyzed. Evaluation is still ongoing for 6 patients (3%). 80/215 patients (37%) were deemed eligible for CAR T-cells, 58 patients (27%) were excluded before any visit at the expert hospital because of histology other than DLBCL, PMBL and tFL (n=30: non-transformed FL 9, transformed SLL/CLL 7, transformed Waldenström 3, transformed MZL 3, MZL 2, primary CNS lymphoma 2, SLL/CLL 1, HL 1, lymphoblastic lymphoma 1, CD19- 1), 〈 2 previous lines (n=7), CNS involvement (n=7), administrative reason (n=14). The remaining 77 patients (36%) were deemed non-eligible for CAR T-cells after the first visit. Median age was 59 years (range 18-86, 41% ≥ 65 years), 68% were male. There were 62, 4 and 2 patients with DLBCL, PMBL and tFL, respectively. Median number of prior lines was 3 (range 2-11, 43% 〉 3 lines), 86% of patients presented with a primary refractory disease. Nine patients were with a refractory disease despite stem cell transplantation (SCT, 5 autologous, 3 allogeneic and 1 both). Considering these 77 patients, 12 (16%) had 2 concomitant causes of non-eligibility. Overall, the two main causes of non-eligibility were rapid disease progression (n=49) and major frailty (n=23), including 10 patients with 11 severe organ dysfunctions [5 cardiac, 3 kidney, 1 liver, 1 respiratory and 1 heavy engine handicap]. Replicative viral infections (n=4) constituted also an important cause of frailty: HIV (1), HBV (2), HBV + HCV (1). Two patients had a solid organ transplantation requiring immunosuppressive drugs. Advanced neurological diseases (n=4) included: extrapyramidal syndrome (3), advanced multiple sclerosis (1). Active autoimmune diseases were a cause of frailty for 2 patients: thyroiditis (1), periodic fever (1). In one patient, the screening evaluation showed a concomitant malignancy. Other causes of non-eligibility were found in 17 patients: complete remission after the salvage therapy (n=7), age 〉 80 (n=4), severe thrombocytopenia 〈 20 G/L (n=2), no slot available (n=1), patient refusal (n=3). Outcomes of the non-eligible patients (alternative treatments, survival) will be presented at the meeting. Conclusion: In this pioneering experience, 37% of patients in whom a CAR T-cell request is made are ultimately deemed eligible for the therapy. Other patients are either rapidly excluded based on lack of CAR T-cells indications (27%), or deemed non-eligible because of failure to control the disease / major frailty (36%). Disclosures Paillassa: Janssen: Other: Bibliography board with young hematologists. Di Blasi:Novartis: Honoraria. Casasnovas:Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Roche: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Gilead: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Gilead: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Bristol-Myers Squibb: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel expenses; Merck Sharp and Dohme: Membership on an entity's Board of Directors or advisory committees, Other: Travel support, Research Funding; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel support; Abbvie: Honoraria, Membership on an entity's Board of Directors or advisory committees. Cartron:Roche, Celgene: Consultancy; Sanofi, Gilead, Janssen, Roche, Celgene: Honoraria. Feugier:gilead: Honoraria, Research Funding, Speakers Bureau; roche: Honoraria, Research Funding, Speakers Bureau; janssen: Honoraria, Research Funding, Speakers Bureau; abbvie: Honoraria, Research Funding, Speakers Bureau. Gyan:Pfizer: Honoraria. Haioun:novartis: Honoraria; celgene: Honoraria; roche: Consultancy; celgene: Consultancy; gilead: Consultancy; takeda: Consultancy; janssen cilag: Consultancy; amgen: Honoraria; servier: Honoraria. Thieblemont:Roche: Honoraria, Research Funding; Kyte: Honoraria; Janssen: Honoraria; Celgene: Honoraria; Cellectis: Membership on an entity's Board of Directors or advisory committees; Gilead: Honoraria; Novartis: Honoraria.

Description: Introduction: Hairy-cell leukemia (HCL) is a chronic B-cell lymphoproliferative disorder with a favorable outcome thanks to treatment with purine analogues (PNA) like cladribine and pentostatin. Here, we updated the French national retrospective cohort of HCL after 10 years of follow-up, in order to evaluate the risk of second cancers in these patients. Methods: Data were collected up to June 2018 through a questionnaire sent to the members of the Société Française d'Hématologie, and centralized in the cohort database. We described the second malignancies observed during the follow-up, distinguishing second 'solid' cancers from second hematological malignancies. Then, using a Fine and Gray model, we performed a multivariate analysis in order to identify second cancer risk factors. Finally, to evaluate the excess of cancers in our cohort in comparison with the French general population, we calculated the standardized incidence ratio (SIR). Results: 279 patients (pts) from 19 centers were included in our retrospective cohort. The median age was 59 years old (range 29-88). 21% had an infectious disease at diagnosis, 23% had a familial history of cancer and 11% a personal history of cancer before HCL diagnosis. The median number of lines of treatments was 1 (0-7). PNA (cladribine or pentostatin) were the first therapeutic choice in frontline (75% of pts) and at relapse (69%). With a median follow-up of 127 months (2-413), the median overall survival for the overall study population was 328 months (95% CI 299-357) and the median relapse-free survival (RFS) was 136 months (95% CI 109-163). Pts treated with cladribine or pentostatin in first line had a statistically significant better RFS than pts treated with 'other' treatments (log rank test, p 〈 0.001). The 10-year cumulative incidence of relapse was 39% (95% CI 33-46). Pts who received treatments other than PNA in first line had a higher risk of relapse (Gray's test, p 〈 0.001). For pts receiving PNA in first and second lines, there was no difference in outcomes between those who switched PNA and those who did not. In this cohort, we observed 68 second malignancies during the follow-up: 49 solid cancers (most prevalent: prostate and non-melanoma skin cancers) and 19 hematological malignancies (most prevalent: monoclonal gammopathy of undetermined significance (MGUS) and myelodysplastic syndromes (MDS)). The median onset of second cancer, second solid cancer and second hematological malignancy from HCL diagnosis was 81 months, 99 months and 78 months, respectively. The median age at diagnosis of cancer, solid cancer and hematological malignancy was 70, 69 and 77 years old, respectively. Considering death as a competing risk, the 10-year cumulative incidence of cancer, solid cancer and hematological malignancy was 15% (95% CI 11-19), 11% (95% CI 7.2-15), and 5.0% (95% CI 2.8-8.2), respectively. In multivariate analyses, IFN treatment was associated with a decreased risk for all cancers (Fine and Gray regression model, subdistribution Hazard Ratio (sdHR) 0.53 (95% CI 0.29-0.97); p = 0.038), a familial history of cancer was a risk factor for solid cancers (sdHR 2.12 (95% CI 1.15-3.91); p = 0.017), a personal history of cancer was a risk factor for hematological malignancies (sdHR 3.47 (95% CI 1.14-10.55); p = 0.028). Even after excluding non-melanoma skin cancers and MGUS, there was an excess of cancers (SIR = 2.22), solid cancers (SIR = 1.81) and hematological malignancies (SIR = 6.67). Conclusions: In this updated real-world retrospective cohort with a long follow-up and most pts treated with PNA, we highlighted the importance and the excess of second cancers in HCL patients, in particular hematological malignancies. Figure Disclosures Paillassa: Janssen: Other: Bibliography board with young hematologists. Thieblemont:Roche: Honoraria, Research Funding; Gilead: Honoraria; Novartis: Honoraria; Kyte: Honoraria; Janssen: Honoraria; Celgene: Honoraria; Cellectis: Membership on an entity's Board of Directors or advisory committees. Hermine:AB Science: Membership on an entity's Board of Directors or advisory committees. Feugier:janssen: Honoraria, Research Funding, Speakers Bureau; gilead: Honoraria, Research Funding, Speakers Bureau; roche: Honoraria, Research Funding, Speakers Bureau; abbvie: Honoraria, Research Funding, Speakers Bureau. Troussard:Innate Pharma: Consultancy, Membership on an entity's Board of Directors or advisory committees; Abbvie: Consultancy, Membership on an entity's Board of Directors or advisory committees; Gilead: Consultancy, Membership on an entity's Board of Directors or advisory committees; Roche: Other: Research Support; Sysmex: Other: Research Support.