Twenty-two patients with high-risk myelodysplastic syndrome (HRMDS) were treated with a 10-day course of oral all trans retinoic acid (45 mg/m2) and s.c. low-dose cytosine arabinoside (LDARAc) given at the dose of 20 mg twice per day. The courses were repeated monthly until response or progression, in the case of response, the therapy was administered until relapse. Morphologic diagnoses were refractory anemia with excess blasts (RAEB) in nine, RAEB in transformation (RAEB-t) in nine, and chronic myelomonocytic leukemia (CMMoL) in four patients; in all cases, bone-marrow blast infiltration was greater than 10% (median 20%, range 12-30%). When the international prognostic scoring system was applied, all the cases qualified as intermediate/high-risk categories. Nineteen patients were males and three were females; the median age was 69 years (range 25-90 years); three patients had previously been treated with conventional chemotherapy, and one of them had also undergone autologous bone-marrow transplantation. The criteria of response were defined as follows: (1) complete response: normalization of blood counts and bone-marrow blasts (<5%), and (2) partial response: decrease in bone-marrow blast infiltration by 50%, and two of the following parameters - improvement in hemoglobin level by 1.5 g/dl or decrease by 50% in transfusional requirement, increase by 50% in absolute neutrophil count, and increase by 50% in platelet count. Overall, 7 (32%) of 22 patients achieved a response, with 5 (23%) being classified as complete responders and 2 (9%) as partial responders. Fifteen (68%) patients did not achieve any response, and 14 died of progressive disease or infectious disease. The overall median survival was 8 months (range 1-27 months), whereas the median survival of responders was 16 months (range 8-27 months); the median duration of response was 11 months (range 2-21 months). Moderate to severe hematological toxicity and infections were the most common side effects. In conclusion, it seems that the association of ATRA and LDARA-C may be effective in approximately 30% of HRMDS patients. Optimizing this approach might be pursued by selecting, on a biological basis, those cases more likely to respond or by incorporating other differentiating agents or growth factors.

No abstract

Introduction: Management of elderly patients with Diffuse Large B-Cell Lymphoma (DLBCL) is challenging. A simplified Comprehensive Geriatric Assessment (sCGA) based on ADL (Activity of Daily Living), IADL (Instrumental ADL) and CIRS-G (Comorbidity Index Rating Scale for Geriatrics) scales has demonstrated to be better than clinical judgement to stratify patients' outcome but has never been included in initial assessment. To further assess the impact of sCGA on patients' outcome, we conducted a prospective observational study on a large series of elderly patients with DLBCL. Methods: Patients were enrolled if 65 year old or older, with an untreated de novo DLBCL. sCGA was available at a web based platform that classified patients as FIT, UNFIT, and FRAIL, as shown in Table 1. Treatment choice was left at physician discretion. According to anthracycline dose, therapy was classified as curative (≥70% of full anthracycline dose), intermediate (&lt;70%) or palliative (no anthracycline). Primary study endpoint was Overall Survival (OS). Results: From December 2013 to December 2017, 1353 patients have been registered by 37 centres and 1207 were eligible. Median age was 76 years (65-94), 68% had stage III-IV, and 55% had an International Prognostic Index(IPI) ≥3; 500 (42%), 304 (25%), and 403 (33%) were classified as FIT, UNFIT and FRAIL, respectively. Data on treatment were available in 1164 patients: rituximab was used in 96% of patients; treatment was curative in 89%, 53%, and 36% of FIT, UNFIT, and FRAIL patients, respectively; intermediate in 10%, 39%, and 31%, palliative in 0%, 8%, and 33% of patients. The OS was available in 1158 out 1164 cases. With a median follow up of 30 months (1-59) 3y-OS was 64% (95% CI 61% to 67%). According to sCGA the OS was significantly different among the 3 geriatric groups. Correlation with OS was improved when sCGA was integrated with age &lt; or ≥ 80 years to define 3 groups of patients (Table 2): FIT and UNFIT younger than 80 years (sCGA Group 1; 55%, 3 yr OS 75%), UNFIT ≥ 80 years and FRAIL younger than 80 years (sCGA Group 2: 28%, 3yr OS 58%), FRAIL ≥ 80 years (sCGA Group 3: 17%; 3yr OS 43%). Univariable and multivariable analysis for OS was conducted using the 3 sCGA groups and other clinical and laboratory features. The 3 sCGA groups were shown as independent prognostic factors with IPI and with anemia (Hb &lt; 12 g/dl). We used results of multivariable analysis to build a categorical prognostic index assigning different weights to prognostic features based on their Hazard Ratio (HR) (Table 3). The Elderly Prognostic Index (EPI) was defined as the score obtained from the sum of the weights and allowed to define 3 risk groups: Low Risk (LR: score 0-1; 23% of patients); Intermediate Risk (IR; score 2-4; 48%); High Risk (HiR; score 5-7; 29%). The 3 EPI risk groups had a different 3 year OS of 87%(95%CI 81-91), 69%(95%CI 63-73), and 42% (95%CI 36-49); HR for IR vs LR 2.57 (1.72, 3.84); HiR vs LR 6.21(4.17 -9.25), HiR vs IR 2.42 (1.91-3.05) (Figure1). Regarding treatment modality, curative, intermediate and palliative therapies were adopted in 89%, 10%, and 1% of the LR group; 70%, 24%, 7% of the IR group, and 37%, 35%, 28% of the HiR group. The model was internally validated by means of 1000 procedures confirming good performance (slope shrinkage 0.935 and c-Harrell 0.675 in validation sample compared with 0.682 in training sample). The EPI was also tested in an external validation data set that was identified from the pivotal study of sCGA in DLBCL (N=172 patients, Tucci A. et al, Leuk Lymph, 2015) (Figure 1). Conclusion: Using data from this large prospective observational study on elderly DLBCL patients we were able to build a new prognostic index that allows to identify 3 risk groups with significant differences in terms of 3 years OS. The EPI is the first index that integrates geriatric assessment with clinical features and contributes to improving management and clinical research in elderly patients with DLBCL. Disclosures Spina: Servier: Membership on an entity's Board of Directors or advisory committees, Other: lecture fee; Sandoz: Membership on an entity's Board of Directors or advisory committees; Novartis: Membership on an entity's Board of Directors or advisory committees; Mundipharma: Membership on an entity's Board of Directors or advisory committees, Other; Roche: Other: lecture fee; Teva: Membership on an entity's Board of Directors or advisory committees, Other: lecture fee; GILEAD: Membership on an entity's Board of Directors or advisory committees, Other: lecture fee; Celgene: Other: lecture fee; BMS: Other: lecture fee; Sanofi Genzyme: Other: lecture fee; CTI: Membership on an entity's Board of Directors or advisory committees, Other: lecture fee; Menarini: Membership on an entity's Board of Directors or advisory committees, Other: lecture fee, Research Funding; Takeda: Other: lecture fee; Janssen-Cilag: Membership on an entity's Board of Directors or advisory committees, Other: lecture fee; Pfizer: Membership on an entity's Board of Directors or advisory committees. Merli:Janssen: Honoraria; Takeda: Honoraria, Other: Travel Expenses; Gilead: Honoraria; Mundipharma: Honoraria; Roche: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel expenses, Research Funding; Sandoz: Membership on an entity's Board of Directors or advisory committees; Teva: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees, Other: Travel Expenses. Cavallo:Takeda: Membership on an entity's Board of Directors or advisory committees; Janssen: Membership on an entity's Board of Directors or advisory committees. Ladetto:Roche: Honoraria; AbbVie: Honoraria; J&J: Honoraria; Celgene: Honoraria; ADC Therapeutics: Honoraria; Acerta: Honoraria, Speakers Bureau; Pfizer: Honoraria, Speakers Bureau. Chiappella:Celgene: Other: advisory board, Speakers Bureau; Janssen: Other: advisory board, Speakers Bureau; Servier: Other: advisory board, Speakers Bureau; Roche: Speakers Bureau; Teva: Speakers Bureau. Nassi:Takeda: Consultancy; Janssen: Consultancy; Merck: Consultancy. Ferrero:Janssen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Gilead: Speakers Bureau; Servier: Speakers Bureau; EUSA Pharma: Membership on an entity's Board of Directors or advisory committees. Luminari:ROCHE: Membership on an entity's Board of Directors or advisory committees; CELGENE: Membership on an entity's Board of Directors or advisory committees, Other: Travel Grant; GILEAD: Other: Lecturer; TAKEDA: Other: Travel Grant.

INTRODUCTION Treatment of Diffuse Large B cell lymphoma (DLBCL) in the elderly population is challenging as many patients (pts) are not eligible to receive standard curative therapy, due to comorbid conditions and to a higher susceptibility to the side effects of standard anthracycline containing regimens. Among currently available active drugs, Lenalidomide has been used in the setting of relapsed/refractory DLBCL both as monotherapy and in combination with rituximab, showing a good activity and an acceptable safety profile. We started a prospective, multicenter, single arm, phase II trial to demonstrate activity and safety of a chemo-free combination of lenalidomide + rituximab in older (≥ 70 years) untreated pts with DLBCL who were prospectively defined as frail according to the simplified comprehensive geriatric assessment (sCGA) (Tucci A. et al., Leuk Lymphoma. 2015 Apr). PATIENTS AND METHODS Pts were eligible if they were previously untreated DLBCL patients, older than 69 years and defined as frail according to sCGA. The treatment consisted of a 28-day cycle (R2) combining oral Lenalidomide (20 mg on days 1 to 21) and i.v. Rituximab (375 mg/m2 on day 1); a maximum number of 6 cycles was planned; response assessment was performed after cycles 4 and 6. At the end of the 6 th cycle, patients with partial or complete response continued treatment with Lenalidomide 10mg/d on days 1 to 21 every 28 days, until cycle 12or unacceptable toxicity. Final response was evaluated within 28 days after the last study drug administration. Primary study endpoint was Overall Response Rate (ORR) after 6 R2 cycles, defined according to Lugano 2014 criteria; co-primary endpoint was the rate of extra-hematological toxicity with CTCAE grade &gt;2 and of death for any cause during the treatment The study was planned according to a two stage Simon design. A total of 68 pts had to be enrolled to complete the study. With 34 responses the study would be able to demonstrate the initial hypothesis of an improvement of response rate from 45% (p0) to 65% (P1) RESULTS From August 2018 to June 2021, 68 newly diagnosed frail DLBCL were enrolled in 18 Italian centers. Median age was 83 years (range 70-91) and 73% had stage III/IV; 57% had High risk IPI (i.e. 3-5 risk factors). 64 pts were confirmed eligible and started R2 treatment. The planned 6 courses of R2 were completed in 36 pts (56%). The median number of R2 cycles was 6 (1-6). Treatment was discontinued in 28 pts due to lymphoma progression (11 cases), extra-hematological toxicity (7), hematological toxicity (1), lost after 1 cycle and investigator choice after 5 cycles in CR in 1 case each, death in 7 cases (1 each for infection, pancytopenia, cachexia, ischemia and bowel infarction, and from unknown causes in 2 cases). At the end of 6 th R2 cycle 26 patients achieved a response (ORR 41%), 13 CR and 13 PR. After a median follow-up of 17 months, the overall survival, and progression free survival at 12 months were 69% (95CI 56-79%) and 55% (95%CI 42-66%), respectively. The duration of remission at 12 months was 72%. Regarding safety 46 events were reported including 31 extra-hematological toxicities &gt; CTCAE grade 2: 7 cardio-vascular (1 resulting in death), 4 nervous system disorders (1 resulting in death), 10 gastro-intestinal, 3 infections, 6 skin and subcutaneous tissue disorders, 5 respiratory events (all resolved). The rate of grade 3-4 adverse events was higher than the highest allowed limit of 28. CONCLUSIONS The Reri is the first study to evaluate activity and safety of a chemo-free therapy in patients with diffuse large B-Cell Lymphoma who are not eligible for conventional cytotoxic therapy. Even if this study was not able confirm the initial activity hypothesis, activity of the R2 combination was observed in a significant proportion of cases warranting further exploration of chemo-free approach of elderly frail patient with DLBCL. Disclosures Tucci: janssen: Membership on an entity's Board of Directors or advisory committees; Gentili: Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees. Fabbri: Takeda: Honoraria; Servier/Pfizer: Honoraria; Takeda: Other: Travel, Accomodations, Expenses. Musuraca: janssen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; incyte: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; roche: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees. Zilioli: Takeda: Other: travel expenses, accommodation; Gentili, Takeda, Gilead, Servier: Consultancy, Speakers Bureau; Roche, Italfarmaco: Consultancy, Honoraria; MSD, Janssen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Other: Travel, Accommodations. Luminari: Roche, Celgene, Teva Pharmaceuticals, Gilead Sciences, and Takeda Pharmaceuticals: Honoraria.