PH negative acute lymphoblastic leukemia in adolescents and young adults treated according a MRD adapted BFM ALL IC 2009 protocol: Argentine real-world data on 171 patients.

Intensified pediatric chemotherapy regimens to treat adolescents and young adults (AYA) patients with Philadelphia negative acute lymphoblastic leukemia (ALL) have been associated with better outcomes. The local BFM 2009-based scheme complements the risk stratification assessing the measurable residual disease (MRD) along the induction phase with increasing levels of sensitivity. The present retrospective multicenter analysis included 171 AYA (15-40 years) patients treated accordingly between 2013 and 2019. Ninety-one percent obtained morphological complete remission, 67% a negative (<0.1%) MRD at day 33 (TP1), and 78% a negative (<0.01%) MRD at day 78 (TP2). The overall survival (OS) and the event-free survival (EFS) at 2 years were 62%±4.1 and 55%±4.1, respectively. The OS and EFS were significant better for prednisone responders, who achieved <10% BM blast at day 15, a negative MRD at TP1 or at TP2, and for low-risk patients. Age ≤30 years and WBC <30×109/L, particularly among B-phenotype, were also associated with longer OS. In the multivariable analyses, TP1 MRD positive (OS HR 2.8, 95% CI 1.4-5.7, p=0.004; EFS HR 3.0, 95% CI 1.6-5.7, p=0.001) and at TP2 (OS HR 2.6, 95% CI 1.3-5.3, p=0.012; EFS HR 2.6, 95% CI 1.3-5.1, p=0.006) were independently associated with earlier events. Age >30 years was also associated with a shorter survival (HR 3.1, 95% CI 1.3-7.5, p=0.014). Therefore, those 68 patients ≤30 years with TP1/TP2 negative MRD depicted a longer OS (2 years 85%±4.8). Based on our real-world data, the pediatric-based scheme is feasible in Argentina associated with better outcomes for younger AYA patients who achieved negative MRD at day 33 and 78.

Predicting Mortality after Autologous Transplant: Development of a Novel Risk Score.

There have been several efforts to predict mortality after autologous stem cell transplantation (ASCT), such as the hematopoietic cell transplant-comorbidity index (HCT-CI), described for allogeneic stem cell transplantation and validated for ASCT, but there is no composite score in the setting of ASCT combining comorbidities with other clinical characteristics. Our aim is to describe a comprehensive score combining comorbidities with other clinical factors and to analyze the impact of this score on nonrelapse mortality (NRM), overall survival (OS), and early morbidity endpoints (mechanical ventilation, shock or dialysis) after ASCT. For the training cohort, we retrospectively reviewed data of 2068 adult patients who received an ASCT in Argentina (October 2002 to June 2017) for multiple myeloma or lymphoma. For the validation cohort, we analyzed 2168 ASCTs performed in the Medical College of Wisconsin and Spanish stem cell transplant group (Grupo Español de Trasplante Hematopoyético (GETH)) (January 2012 to December 2018). We first performed a multivariate analysis for NRM in order to select and assign weight to the risk factors included in the score (male patients, aged 55 to 64 and ≥65 years, HCT-CI ≥3, Hodgkin lymphoma and non-Hodgkin lymphoma). The hazard ratio for NRM increased proportionally with the score. Patients were grouped as low risk (LR) with a score of 0 to 1 (686, 33%), intermediate risk (IR) with a score of 2 to 3 (1109, 53%), high risk (HR) with a score of 4 (198, 10%), and very high risk (VHR) with a score of ≥5 (75, 4%). The score was associated with a progressive increase in all the early morbidity endpoints. Moreover, the score was significantly associated with early NRM (day 100: 1.5% versus 2.4% versus 7.6% versus 17.6%) as well as long term (1 to 3 years; 1.8% to 2.3% versus 3.8% to 4.9% versus 11.7% to 14.5% versus 25.0% to 27.4%, respectively; P< .0001) and OS (1 to 5 years; 94% to 73% versus 89% to 75% versus 76% to 47% versus 65% to 52% respectively; P < .0001). The score was validated in an independent cohort (N = 2168) and was significantly associated with early and late events. In conclusion, we developed and validated a novel score predicting NRM and OS in 2 large cohorts of more than 2000 autologous transplant patients. This tool can be useful for tailoring conditioning regimens or defining risk for transplant program decision making.

Hematopoietic Cell Transplantation-Specific Comorbidity Index Predicts Morbidity and Mortality in Autologous Stem Cell Transplantation.

The hematopoietic cell transplantation-specific comorbidity index (HCT-CI) score is a useful tool to assess the risk for nonrelapse mortality (NRM) after allogeneic hematopoietic stem cell transplantation. Although the HCT-CI has been investigated in autologous stem cell transplantation (ASCT), its use is limited. To improve on the current use of the HCT-CI score on the morbidity and mortality after ASCT, we assessed the 100-day morbidity defined as orotracheal intubation (OTI), dialysis or shock (vasopressors need), 100-day NRM, early composite morbidity-mortality (combined endpoint that included any previous endpoints), and long-term NRM. We retrospectively reviewed a cohort of 1730 records of adult patients who received an ASCT in Argentinean center's between October 2002 and August 2016. Median follow-up was 1.15 years, and median age was 53 years. Diseases were multiple myeloma (48%), non-Hodgkin lymphoma (27%), and Hodgkin lymphoma (17%); 51% were in complete or partial remission; and 13% received ≥ 3 chemotherapy lines before transplant (heavily pretreated). Early NRM (100-day) was 2.7%, 5.4% required OTI, 4.5% required vasopressors, and 2.1% dialysis, with an early composite morbidity-mortality of 6.8%. Long-term (1 and 3 years) NRM was 4% and 5.2% and overall survival 89% and 77%, respectively. High-risk HCT-CI patients had a significant increase in 100-day NRM compared with intermediate and low risk (6.1% versus 3.4% versus 1.8%, respectively; P = .002), OTI (11% versus 6% versus 4%, P = .001), shock (8.7% versus 5.8% versus 3%, P = .001), early composite morbidity-mortality (13% versus 9 % versus 4.7%, P < .001), and long-term NRM (1 year, 7.7% versus 4% versus 3.3%; and 3 years, 10.8% versus 4% versus 4.8%, respectively; P = .002). After multivariate analysis these outcomes remained significant: early composite morbidity-mortality (odds ratio [95% confidence interval] compared with low risk: intermediate risk 2.1 [1.3 to 3.5] and high risk 3.3 [1.9 to 5.9]) and NRM (hazard ratio [95% confidence interval] compared with low risk: intermediate risk .97 [.8 to 2.4] and high risk 3.05 [1.3 to 4.5]). No significant impact was observed in overall survival. Other than comorbidities, significant impact was observed for heavily pretreated patients, age ≥ 55 years, non-Hodgkin lymphoma, and bendamustine-etoposide-citarabine-melphalan conditioning. We confirmed that the HCT-CI had a significant impact on NRM after ASCT, and these findings are mainly due to early toxicity express as 100-day NRM and the 3 main morbidity outcomes as well as the composite endpoint.

Allogeneic hematopoietic stem cell transplantation in adults with myelodysplastic syndrome: Experience of the Argentinean Group of Bone Marrow Transplantation (GATMO).

INTRODUCTION: Allogeneic hematopoietic stem cell transplantation (AHSCT) is a curative approach for patients with myelodysplastic syndrome (MDS). METHODS: In this multicenter retrospective study, we analyzed the outcome of adult patients with MDS who underwent AHSCT in Argentina and evaluated the prognostic factors associated with progression-free survival (PFS), overall survival (OS), cumulative incidence (CI) of relapse, and non-relapse mortality (NRM). RESULTS: We analyzed data from 87 adults (median age: 43 years, range 18-66) who underwent SCT after myeloablative (n = 60) or non-myeloablative conditioning (n = 27), and from related (n = 62) or unrelated (n = 25) donors. For all patients, unadjusted 4-year PFS and OS were 37% and 38%, respectively; no significant differences were found between recipients of related or unrelated donors. One-year CI of relapse and NRM were 21% and 20%, respectively. In the multivariate analysis, intermediate disease risk index (DRI) and acute graft versus host disease AGVHD of all grades (I-IV) were independent variables associated with better PFS and lower relapse CI; only intermediate DRI was associated with better OS. CONCLUSIONS: AHSCT is a feasible procedure in Argentina, with more than 30% of the patients achieving long-term survival. Recipients with unrelated donors had at least similar outcome than those with related donors. DRI may be useful to identify patients at higher risk of relapse after transplantation.

Allogeneic hematopoietic stem cell transplantation in the elderly. Predicting the risk for non relapse mortality.

We have retrospectively reviewed 137 medical records of patients older than 50 years receiving an allogeneic hematopoietic stem cell transplantation (HSCT) between January 1997 and July 2013. Median follow up was 1.3 years. Sex, age, diagnosis, disease stage, comorbidities (according to HCT-CI score), type of donor, histocompatibility, conditioning regimen and graft-versus-host disease (GVHD) prophylaxis were evaluated. The incidence and severity of acute and chronic GVHD, overall survival (OS), disease free survival (DFS), non-relapse mortality (NRM) and relapse were investigated according those variables. Acute GVHD incidence was 41% (7.3% GIII-IV). Patients with acute myeloid leukemia had lesser aGVH GII-IV (14% vs. 35%, p<0.01) comparing to the entire population. Extensive cGVHD incidence was 9.4%. Global OS 1-3 years was 44-20%, DFS 33-20%, relapse 35-41% and NRM 36-43% respectively. The presence of comorbidities showed a significant increase in NRM (CT-CI 0 vs. 1 vs ≥2: 1-3 years 17-24% vs. 40-46% vs. 45-67%, p=0.001, MA HR 2.03, CI 95% 1.02-5.29), as well as cyclosporine vs. tacrolimus (1-3 years 47-53% vs. 25-36%, p=0.01). Tacrolimus patients had higher 1-3 years OS (49-25% vs. 31-13%, p=0.01) and DFS (41-26% vs. 20-11%, p<0.01). Age, type of donor and myeloablative conditioning showed no significant differences in any outcome. Allogeneic HSCT is a valid therapeutic option for older patients in Argentina. The main risk factor for a significantly increased NRM and a trend to inferior OS was the number of comorbidities. Age was not a factor for a worse result. The other factor having a significant effect in better outcome was tacrolimus administration.

Allogeneic hematopoietic stem cell transplantation in the elderly: Predicting the risk for non relapse mortality

We have retrospectively reviewed 137 medical records of patients older than 50 years receiving an allogeneic hematopoietic stem cell transplantation (HSCT) between January 1997 and July 2013. Median follow up was 1.3 years. Sex, age, diagnosis, disease stage, comorbidities (according to HCT-CI score), type of donor, histocompatibility, conditioning regimen and graft-versus-host disease (GVHD) prophylaxis were evaluated. The incidence and severity of acute and chronic GVHD, overall survival (OS), disease free survival (DFS), non-relapse mortality (NRM) and relapse were investigated according those variables. Acute GVHD incidence was 41% (7.3% GIII-IV). Patients with acute myeloid leukemia had lesser aGVH GII-IV (14% vs. 35%, p < 0.01) comparing to the entire population. Extensive cGVHD incidence was 9.4%. Global OS 1-3 years was 44-20%, DFS 33-20%, relapse 35-41% and NRM 36-43% respectively. The presence of comorbidities showed a significant increase in NRM (CT-CI 0 vs. 1 vs ≥ 2: 1-3 years 17-24% vs. 40-46% vs. 45-67%, p = 0.001, MA HR 2.03, CI 95% 1.02-5.29), as well as cyclosporine vs. tacrolimus (1-3 years 47-53% vs. 25-36%, p = 0.01). Tacrolimus patients had higher 1-3 years OS (49-25% vs. 31-13%, p = 0.01) and DFS (41-26% vs. 20-11%, p < 0.01). Age, type of donor and myeloablative conditioning showed no significant differences in any outcome. Allogeneic HSCT is a valid therapeutic option for older patients in Argentina. The main risk factor for a significantly increased NRM and a trend to inferior OS was the number of comorbidities. Age was not a factor for a worse result. The other factor having a significant effect in better outcome was tacrolimus administration.

Se efectuó un análisis retrospectivo de 137 historias clínicas de pacientes mayores de 50 años que recibieron un trasplante alogénico de precursores hematopoyéticos (TAPH). Se evaluaron las siguientes características: sexo, edad, enfermedad, estadio, comorbilidades (según el HCT-CI), donante, acondicionamiento e inmunosupresión. Se analizó la incidencia de enfermedad injerto vs. huésped aguda (aEICH) y crónica (cEICH), supervivencia global (SG), supervivencia libre de enfermedad (SLE), recaída y mortalidad libre de enfermedad (MLE). Los trasplantes fueron realizados entre 1997-2013, mediana de seguimiento 1.3 años. La incidencia de aEICH fue de 41% (7.3% GIII-IV). Los pacientes con leucemia mieloide aguda presentaron menor incidencia de EICHa GII-IV (14% vs. 34%, p < 0.01). La incidencia de EICHc extenso fue de 9.4%. La SG a 1-3 años fue 44-20%, SLE 33-20%, recaída 35-41% y la MLE 36-43%. Los pacientes con comorbilidades tuvieron un aumento significativo de la MLE (HCT-CI 0 vs. 1 vs. ≥2: 1-3 años 17-24% vs. 40-46% vs. 45-67%, p = 0.001, AMV HR 2.03, IC 95% 1.02-5.29), al igual que el uso de ciclosporina vs. tacrolimus (1-3 años 47-53% vs. 25-36%, p = 0.01). Los pacientes que recibieron tacrolimus tuvieron una mayor SG (1-3 años 49-25% vs. 31-13%, p = 0.01) y SLE (1-3 años 41-26% vs. 20-11%, p < 0.01). La edad, tipo de donante y acondicionamiento no resultaron significativos para ningún evento. El TAPH es una herramienta terapéutica válida en pacientes mayores. Los factores pronósticos que inciden mayormente en el trasplante son las comorbilidades y no la edad. El otro factor que demostró un efecto significativo fue el uso de tacrolimus.