Depth of response prior to autologous stem cell transplantation to predict survival in light chain amyloidosis.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. 8516-8516
Author(s):  
Iuliana Vaxman ◽  
M Hasib Sidiqi ◽  
Abdullah S. Al Saleh ◽  
Shaji Kumar ◽  
Eli Muchtar ◽  
...  
Keyword(s):  
Stem Cell ◽  
Partial Response ◽  
Induction Therapy ◽  
Light Chain ◽  
Multivariable Analysis ◽  
Al Amyloidosis ◽  
Prognostic Impact ◽  
Cell Transplant ◽  
Depth Of Response ◽  
The Impact

8516 Background: The role of induction therapy prior to autologous stem cell transplant (ASCT) in immunoglobulin light chain (AL) amyloidosis remains controversial. Data on the prognostic impact of response to induction in a transplanted cohort are lacking. The aim of this study was to assess the impact of response to induction therapy on survival in patients undergoing ASCT for AL amyloidosis. Methods: We conducted a retrospective study of all newly diagnosed AL amyloidosis patients who received induction prior to ASCT between January 2007 and August 2017 at Mayo Clinic, Rochester, Minnesota. Patients receiving only corticosteroids prior to transplant were excluded as were those with an involved light chain of less than 5 mg/dL (not measurable for response). Results: 134 patients met inclusion criteria. The median age at diagnosis was 60 (range 36-74) and 85 (63%) were men. The most commonly used induction regimen was proteasome inhibitor-based (73.1%, n=98). The overall response rate to induction was 83% (complete response 17%, very good partial response 30% and partial response 36%). With a median follow up of 56.5 months, the median PFS and OS was 48.5 months and not reached, respectively. Response depth to induction therapy was associated with improved PFS and OS and was independent of the bone marrow plasma cell percentage. The median PFS was not reached for patients achieving ≥VGPR prior to ASCT and 33.8 months for patient achieving PR or less (P=0.001). The median OS was longer in patients with deeper responses (not reached for patients achieving ≥VGPR vs. 128 months for patients achieving PR or less (P=0.02). On multivariable analysis, independent predictors of OS were melphalan conditioning dose (RR= 0.38; P=0.018) and depth of response prior to transplant (RR 2.52; P=0.039). Conclusions: Hematologic response prior to transplant predicts post-transplant outcomes in patients with AL amyloidosis. [Table: see text]

Pre-Stem Cell Transplant Induction Therapy Does Not Affect Post-Transplant Survival In Light Chain (AL) Amyloidosis

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 370-370 ◽  
Author(s):  
Sumit Madan ◽  
Shaji Kumar ◽  
Martha Lacy ◽  
Angela Dispenzieri ◽  
Francis Buadi ◽  
...  
Keyword(s):  
Stem Cell ◽  
Induction Therapy ◽  
Light Chain ◽  
Research Funding ◽  
Rank Test ◽  
Al Amyloidosis ◽  
Cell Transplant ◽  
Exact Test ◽  
Post Transplant ◽  
Hematologic Response

Abstract Abstract 370 Background: Light chain (AL) amyloidosis is characterized by the deposition of amyloid derived from immunoglobulin light chains in various organs. Autologous peripheral blood stem cell transplantation (SCT) is a commonly used and effective treatment for AL. For patients (pts) undergoing this procedure, a proportion of pts receive treatment similar to induction therapy employed in pts with myeloma undergoing SCT. However, the significance of induction therapy and its impact on the overall survival (OS) in AL is unknown. We conducted this study to ascertain the role of pre-SCT therapy on the post-transplant outcomes in AL. Patients and methods: 435 pts with AL who underwent SCT at our institution between March 1996 and May 2010 form the study group. Groups were compared using Fisher's exact test or t-test, and survival was calculated using Kaplan Meier method. Survival curves were compared using log rank test. Result: The median (range) age of pts at the time of SCT was 57.4 years (26-75); 260 (60%) were males. The median (range) duration from AL diagnosis to SCT was 4 mos (1-87), and 284 (65%) pts were alive at the time of analysis. Melphalan 200/m2 (271 pts) or Mel/TBI (17 pts) was used for conditioning in 66% pts, whereas the remaining one-third had reduced doses of melphalan (100-160 mg/m2). The median OS for pts that received pre-SCT therapy (N=286) compared with those who did not (N=149) was 94.7 and 96.5 months, respectively (P=0.6) (Fig 1). Among the group of pts who underwent pre-SCT therapy and were evaluable for response, the median OS for those with a hematologic response (N=42) and no hematologic response (N=42) was 82.1 and 51 months (P=0.2), respectively (Fig 2). Conclusion: Our study demonstrates no difference in the OS of AL patients who received a pre-SCT therapy compared with those who received a SCT after their diagnosis of AL. In patients receiving pre-SCT therapy, there was a trend towards reduced OS among those with no hematologic response to pre-transplant therapy, but this difference was not significant. Disclosure: Kumar: Celgene: Consultancy, Research Funding; Millennium: Research Funding; Merck: Consultancy, Research Funding; Novartis: Research Funding; Genzyme: Consultancy, Research Funding; Cephalon: Research Funding. Dispenzieri:Celgene: Honoraria, Research Funding; Binding Site: Honoraria.

scholarly journals Impact of donor age and kinship on clinical outcomes after T-cell–replete haploidentical transplantation with PT-Cy

2020 ◽  
Vol 4 (16) ◽  
pp. 3900-3912 ◽  
Author(s):  
Jacopo Mariotti ◽  
Anna Maria Raiola ◽  
Andrea Evangelista ◽  
Angelo Michele Carella ◽  
Massimo Martino ◽  
...  
Keyword(s):  
Stem Cell ◽  
T Cell ◽  
Clinical Outcomes ◽  
Chronic Gvhd ◽  
Multivariable Analysis ◽  
Cell Transplant ◽  
Donor Age ◽  
Hematopoietic Cell Transplant ◽  
The Impact ◽  
Risk Of Relapse

Abstract Donor selection contributes to improve clinical outcomes of T-cell–replete haploidentical stem cell transplantation (haplo-SCT) with posttransplant cyclophosphamide (PT-Cy). The impact of donor age and other non-HLA donor characteristics remains a matter of debate. We performed a multicenter retrospective analysis on 990 haplo-SCTs with PT-Cy. By multivariable analysis, after adjusting for donor/recipient kinship, increasing donor age and peripheral blood stem cell graft were associated with a higher risk of grade 2 to 4 acute graft-versus-host-disease (aGVHD), whereas 2-year cumulative incidence of moderate-to-severe chronic GVHD was higher for transplants from female donors into male recipients and after myeloablative conditioning. Increasing donor age was associated with a trend for higher nonrelapse mortality (NRM) (hazard ratio [HR], 1.05; P = .057) but with a significant reduced risk of disease relapse (HR, 0.92; P = .001) and improved progression-free survival (PFS) (HR, 0.97; P = .036). Increasing recipient age was a predictor of worse overall survival (OS). Risk of relapse was higher (HR, 1.39; P < .001) in patients aged ≤40 years receiving a transplant from a parent as compared with a sibling. Moreover, OS and PFS were lower when the donor was the mother rather than the father. Pretransplant active disease status was an invariably independent predictor of worse clinical outcomes, while recipient positive cytomegalovirus serostatus and hematopoietic cell transplant comorbidity index >3 were associated with worse OS and PFS. Our results suggest that younger donors may reduce the incidence of aGVHD and NRM, though at higher risk of relapse. A parent donor, particularly the mother, is not recommended in recipients ≤40 years.

scholarly journals Conventional Therapy for Amyloid Light-Chain Amyloidosis

2020 ◽  
Vol 143 (4) ◽  
pp. 365-372
Author(s):  
Paolo Milani ◽  
Giovanni Palladini
Keyword(s):  
Stem Cell ◽  
Plasma Cell ◽  
Light Chain ◽  
Cell Clone ◽  
Alkylating Agents ◽  
Proteasome Inhibitors ◽  
Response Rates ◽  
Al Amyloidosis ◽  
Cell Transplant ◽  
Conventional Chemotherapy

The vast majority of patients with light-chain (AL) amyloidosis are not eligible for stem cell transplant and are treated with conventional chemotherapy. Conventional regimens are based on various combinations of dexamethasone, alkylating agents, proteasome inhibitors, and immunomodulatory drugs. The choice of these regimens requires a careful risk stratification, based on the extent of amyloid organ involvement, comorbidities, and the characteristics of the amyloidogenic plasma cell clone. Most patients are treated upfront with bortezomib and dexamethasone combined with cyclophosphamide or melphalan. Cyclophosphamide does not compromise stem cell mobilization and harvest and is more manageable in renal failure. Melphalan can overcome the effect of t(11;14), which is associated with lower response rates and shorter survival in subjects treated with bortezomib and dexamethasone, or in combination with cyclophosphamide. Lenalidomide and pomalidomide are the mainstay of rescue treatment. They are effective in patients exposed to bortezomib, dexamethasone, and alkylators, but deep hematologic responses are rare. Ixazomib, alone or in combination with lenalidomide, increases the rate of complete responses in relapsed/refractory patients. Conventional chemotherapy regimens will represent the backbone for future combinations, particularly with anti-plasma-cell immunotherapy, that will further improve response rates and outcomes.

scholarly journals Sequential response-driven bortezomib-based therapy followed by autologous stem cell transplant in AL amyloidosis

2020 ◽  
Vol 4 (17) ◽  
pp. 4175-4179
Author(s):  
Marco Basset ◽  
Paolo Milani ◽  
Mario Nuvolone ◽  
Francesca Benigna ◽  
Lara Rodigari ◽  
...  
Keyword(s):  
Stem Cell ◽  
Partial Response ◽  
Stem Cell Transplant ◽  
Complete Response ◽  
Autologous Stem Cell Transplant ◽  
Survival Duration ◽  
Al Amyloidosis ◽  
Cell Transplant ◽  
Duration Of Response ◽  
Landmark Analyses

Abstract Autologous stem cell transplant (ASCT) is highly effective in selected patients with light chain (AL) amyloidosis. Bortezomib, preceding or following ASCT, improves responses. Satisfactory responses, including at least a partial response, very good partial response (VGPR) with organ response, or complete response, can be observed after induction therapy alone. We report 139 patients treated upfront with cyclophosphamide/bortezomib/dexamethasone (CyBorD), followed by ASCT only if response was unsatisfactory. Only 1 treatment-related death was observed. After CyBorD, hematologic response (HR) rate was 68% (VGPR or better, 51%), with 45% satisfactory responses. Transplant was performed in 55 (40%) subjects and resulted in an 80% HR rate (65% ≥ VGPR). Five-year survival was 86% and 84% in patients treated with ASCT or CyBorD alone, respectively (P = .438). Also, 6- and 12- month landmark analyses did not show differences in survival. Duration of response was not different in the 2 groups (60 vs 49 months; P = .670). Twenty-one (15%) patients with an unsatisfactory response to CyBorD could not undergo ASCT because of ineligibility or refusal; instead, they received rescue chemotherapy, with HR in 38% of cases and 51% 5-year survival. This sequential response-driven approach, offering ASCT to patients who do not attain satisfactory response to upfront CyBorD, is very safe and effective in AL amyloidosis.

scholarly journals Allogeneic but Not Autologous Stem Cell Transplant Attenuates the Negative Prognostic Impact Dictated By Pretransplant MRD Positivity

Blood ◽  
2014 ◽  
Vol 124 (21) ◽  
pp. 2363-2363
Author(s):  
Francesco Buccisano ◽  
Luca Maurillo ◽  
Maria Ilaria Del Principe ◽  
Gottardo De Angelis ◽  
Raffaella Cerretti ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Stem Cell Transplant ◽  
Conflicts Of Interest ◽  
Disease Free Survival ◽  
Autologous Stem Cell Transplant ◽  
Poor Performance Status ◽  
Prognostic Impact ◽  
Cell Transplant ◽  
The Impact

Abstract Multiparametric flow cytometry (MPFC) detection of minimal residual disease (MRD) represents a robust surrogate for the quality of complete remission (CR) and reliably predicts clinical outcome. In our experience, MRD detection provides prognostically relevant information when assessed at the post-consolidation time point. Ten years ago we demonstrated that the amount of MRD before autologous stem cell transplant (AuSCT) affected outcome. More recently, other authors have extended this observation to allogeneic stem cell transplant (ASCT) showing that pre-transplant MRD is a major determinant of prognosis regardless of graft-versus-leukemia (GVL) effect. The aim of our study was to evaluate, in an extended series of patients submitted to AuSCT or ASCT, the impact of a pre-transplantation MRD positive (MRDpos) or negative (MRDneg) status on overall survival (OS) and disease free survival (DFS). We analyzed 173 MRDpos and 53 MRDneg patients of whom 67 were submitted to AuSCT and 51 to ASCT. Eighty-two patients received no transplant because of age, poor performance status or insufficient stem cell harvest whereas 26, all in the MRDpos group, relapsed before transplant delivery. In the AuSCT group, before transplant, 32/67 (48%) were MRDneg and 35/67 (52%) MRDpos, with MRDneg group showing a superior OS (55% vs 20%, p=0.007). In the ASCT group, before transplant, 45/51 (88%) were MRDpos and 6/51 (12%) MRDneg. For 21 out of 51 (41%) sources of stem cells were matched unrelated donors (12) or haploidentical donors (9). In this subgroup, MRDpos and MRDneg patients shared a comparable 5-years OS (60% vs 56%, p=NS), with a 36% survival gain for those MRDpos who received ASCT as compared to AuSCT. Among MRDneg patients, no survival differences were demonstrated between those submitted to AuSCT or ASCT (55% vs 60%, p=NS). Such a lack of difference is likely due to the higher treatment related mortality (ASCT 3/6, 50% vs AuSCT 2/32, 6%, p=0.003) which counterbalanced the lower relapse rate in the ASCT group (ASCT 0/6, 0% vs AuSCT 11/32, 34%, p=NS). In conclusion, ASCT confers a significant survival advantage to MRDpos patients, attenuating the negative prognostic impact of pre-transplant MRD positivity. ASCT may expose MRDneg patients to an excess of toxicity suggesting that in these patients the allogeneic option should be postponed after a second remission. In MRDpos patients, AuSCT does not represent a valid therapeutic choice and ASCT, which should be timely delivered, also considering alternative sources of stem cells. Disclosures No relevant conflicts of interest to declare.

scholarly journals Dartumumab in Pretreated AL Amyloidosis: A Systematic Review

Blood ◽  
2020 ◽  
Vol 136 (Supplement 1) ◽  
pp. 46-47
Author(s):  
Iqraa Ansar ◽  
Karun Neupane ◽  
Hamid Ehsan ◽  
Muhammad Yasir Anwar ◽  
Hassaan Imtiaz ◽  
...  
Keyword(s):  
Heart Failure ◽  
Partial Response ◽  
Light Chain ◽  
Response Rate ◽  
Renal Involvement ◽  
Al Amyloidosis ◽  
Cell Transplant ◽  
Efficacy And Safety ◽  
Mesh Terms ◽  
Combination Regimens

Background: Amyloidosis is characterized by the deposition of misfolded lambda or kappa light chain (AL) proteins in tissue. It commonly affects the heart, which correlates with poor prognosis. Disease-modifying therapies aim to suppress the production of abnormal light chains. Daratumumab (Dara) use is associated with a reduction in light chain protein production. Dara is a human anti-CD38 monoclonal antibody approved for the treatment of newly diagnosed and Relapsed & Refractory Multiple Myeloma. AL amyloidosis plasma cells express CD38, and therefore, Dara is an attractive alternative in this setting. This review aims to assess the efficacy and safety of daratumumab in pre-treated AL amyloidosis patients. Methods: We conducted a comprehensive literature search in PubMed, Embase, Medline using MeSH terms and keywords "AL amyloidosis," "daratumumab", and "darzalex" to incorporate the studies published up to July 2020. We included studies assessing the efficacy and safety of daratumumab alone or in combination with other therapies in pretreated AL amyloidosis. After excluding duplicates, non-relevant, and review articles, we selected four prospective and twelve retrospective studies. RESULTS: In our review, data on 482 patients were included. The ages ranged from 35-88 years. The median number of prior therapies was 3 (ranges:2-6), and the most common therapy was bortezomib in 90% of patients followed by immunomodulators in 55% and stem cell transplant in 35%. A total of 260 (54%) patients received Dara monotherapy, 126 (26%) received Dara plus Dexamethasone (d), and 96 (20%) patients received other Dara containing two or three-drug regimens. The time from the diagnosis to the start of Dara therapy varied from 1 to 137 months. 71 % of patients had cardiac, and 62 % had renal involvement. There was a greater than 30 % reduction of N-terminal pro-brain natriuretic peptide (NT-proBNP) in cardiac patients responsive to therapy. 1. Daratumumab monotherapy: Dara monotherapy achieved an overall response rate (ORR) of 76% (191/249), complete response (CR) of 30% (69/224), very good partial response (VGPR) of 41% (79/192) and partial response (PR) of 14% (19/140). The overall survival (OS) ranges from 59-100% at 10-12 months were noted. Table 1. 2. Daratumumab+ Dexamethasone: Dara plus d achieved ORR of 81% (86/106), CR of 51% (53/102), VGPR of 29% (18/62), PR of 15% (15/102), and OS of 87% at 24 months. Table 1. 3. Daratumumab with combination regimens: The use of Dara based combination regimens of Dara+pomalidomide (P)+d (36% of patients), Dara+lenalidomide (R)+d (32%) and Dara+bortezomib (V)+d (18%), reported by Abeykoon et al., showed an ORR of 88% (14/16), CR of 19 % (3/16), VGPR of 63% (10/16), PR of 6 %(1/16), OS of 89 % at 10 months and progression-free survival (PFS) of 83% at 10 months. Godara et al. reported an ORR of 100% (9/9) using a combination of Dara and birtamimab. The combination of D+cyclophosphamide (c)+V+d reported by Palladini et al. achieved an ORR of 96 % (27/28), CR of 36 % (11/28), VGPR of 29 % (8/28) and PR of 14 % (4/28).Table 1. The most reported adverse event was infusion-related reactions; grade 3-4 adverse were less than 10 % and mostly related to the heart (heart failure & atrial fibrillation). The most-reported hematological adverse effects were anemia, thrombocytopenia, neutropenia, infections, and sepsis. The most common non-hematological adverse events were heart failure, bronchitis, pneumonia, fatigue, nausea, and diarrhea. Table 2. Conclusion: Dara therapy is associated with promising efficacy with a response rate of more than 70% when used alone and more than 80% when used in combination. These regimens are well tolerated in advanced cardiac disease patients with a tolerable risk of volume overload and infusion-related complications. Additional multicenter randomized, double-blind clinical trials are needed to confirm these results. Disclosures Anwer: Incyte, Seattle Genetics, Acetylon Pharmaceuticals, AbbVie Pharma, Astellas Pharma, Celegene, Millennium Pharmaceuticals.: Honoraria, Research Funding, Speakers Bureau.

Role of autologous stem cell transplant after induction therapy with bortezomib-lenolidomide or bortezomib-thalidomide in newly diagnosed multiple myeloma patients

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 8596-8596
Author(s):  
N. Shah ◽  
D. Weber ◽  
R. Orlowski ◽  
M. Wang ◽  
S. K. Thomas ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Stem Cell ◽  
Partial Response ◽  
Induction Therapy ◽  
Stem Cell Transplant ◽  
Autologous Stem Cell Transplant ◽  
Cell Transplant ◽  
Newly Diagnosed ◽  
Highly Active

8596 Background: The introduction of novel therapeutic options with bortezomib and immunomodulatory agents in the up-front management of multiple myeloma (MM) has significantly improved induction response rates. However, the role of high dose chemotherapy and autologous stem cell transplant (ASCT) after induction with these highly active agents is not known, especially in patients with only a partial response to induction therapy. Methods: We conducted a retrospective review of 95 newly diagnosed MM patients treated with induction bortezomib-lenolidomide-dexamethasone (BLD) or bortezomib-thalidomide-dexamethasone (BTD) prior to ASCT. Responses were graded according to IMWG criteria. Results: 19 patients received BLD and 76 patients received BTD. All patients were conditioned with a melphalan-based regimen. Of the 19 patients who underwent induction with BLD, complete response (CR), very good partial response (VGPR) and partial response (PR) were achieved in 2 (11%), 8 (42%) and 9 (47%) respectively for an overall response rate (ORR) of 19/19 (100%). After ASCT, CR, VGPR and PR were achieved in 9 (47%), 5 (26%) and 5 (26%) respectively for a continued ORR of 21/21 (100%). Notably, 4/8 (50%) of patients with a VGPR after induction therapy with BLD improved to a CR after ASCT. 3/9 (33%) of patients with an initial PR to BLD improved to a CR and 1/9 (11%) with a PR improved to VGPR after ASCT. Of the 76 patients who underwent induction with BTD, CR, VGPR and PR were achieved in 6 (8%), 37 (49%) and 31(41%) respectively for an ORR of 74/76 (97%). 1 patient had stable disease and 1 patient had progressive disease. After ASCT, 27/76 (36%) achieved a CR, 30/76 (39%) a VGPR and 18/76 (24%) a PR for an ORR of 75/76 (99%). Of the patients who initially had a VGPR to BTD 16/37 (43%) improved to a CR while 5/32(16%)of PR patients improved to a CR and 9/32 (28%) of PR patients improved to a VGPR. Conclusions: Of the 40 patients who only achieved a PR after induction therapy with BLD or BTD, 16 (40%) had further improvement to a CR or VGPR after ASCT. Thus there is a significant benefit of ASCT in these patients who initially demonstrate relative resistance to induction therapy with highly active regimens. [Table: see text]

Depth of Response with Stem Cell Transplantation and Outcome for Multiple Myeloma in the Era of Novel Agents.

Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 1228-1228
Author(s):  
David Dingli ◽  
Francesca Gay ◽  
Francis Buadi ◽  
Angela Dispenzieri ◽  
Suzanne R Hayman ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Overall Survival ◽  
Stem Cell ◽  
Stem Cell Transplantation ◽  
Cell Transplantation ◽  
Novel Agents ◽  
Cell Transplant ◽  
Time To Progression ◽  
Depth Of Response ◽  
The Impact

Abstract Abstract 1228 Poster Board I-250 Background It is generally believed that a ‘deeper’ response in multiple myeloma is associated with an improved outcome, including time to progression (TTP) as well as overall survival. Before the advent of novel agents such as IMiDs or bortezomib, complete responses (CR) were rare in the absence of stem cell transplantation (ASCT). In that era, the depth of response achieved before ASCT tended to be dwarfed by the impact of the conditioning used for stem cell transplant. Hence, the time to progression in patients achieving CR before ASCT was not different from those who achieved CR after ASCT. With novel agents, CR rates are higher and again raises the question of whether patients who achieve CR before ASCT benefit from consolidation with ASCT. The purpose of this analysis was to determine whether CR achieved before ASCT still benefit when consolidated with ASCT Methods After approval from the Institutional Review Board at Mayo Clinic Rochester, the transplant dysproteinemia database was searched for all patients treated with novel agents and patients who achieved CR before or after ASCT were identified. In addition, we identified patients with IMiDs induction therapy and achieved CR but did not proceed with ASCT. Relevant demographic, clinical and laboratory characteristics were determined at the time of ASCT. Comparisons between groups were performed with non-parametric tests. Overall survival and TTP were determined from the time of ASCT using the Kaplan-Meier method. Results A total of 354 patients who underwent ASCT within a year from diagnosis of multiple myeloma were identified. Of these, 24 achieved CR before proceeding to ASCT while another 100 patients achieved CR after ASCT. There were no differences between the two cohorts with respect to age (58 vs 57.5 yr, p=0.14), gender, number of treatment regimens (1 vs 1, p=0.83), time to ASCT (6.5 vs 6.3 months, p=0.80), b2M (2.41 vs 2.26, p=0.58) and ISS (p=0.23). Patients who achieved CR before ASCT had a lower plasma cell burden (1.0 vs 5.0%, p<0.0001) and lower labeling index (0 vs 0, p=0.0007). Aneuploidy was present in none of the patients with CR before transplant compared to 10% in patients who achieved CR after ASCT (p=0.11). The median TTP for patients with CR before ASCT has not been reached (71% at 70 months) compared to 30 months for patients who achieved CR after ASCT (p=0.07). After a median follow up of 70 months, 21 of 24 patients (88%) with CR before transplant are alive compared to 76 of 100 patients with CR after ASCT (p=0.44). In contrast, for patients who achieved CR with IMiDs but did not proceed with ASCT, 55% have not progressed at 51 months and 71.7% are alive at 51 months (Gay et al ASH, 2009). Conclusion Our results suggest that patients who achieve CR before ASCT benefit from high-dose therapy and experience prolonged TTP without the need for maintenance therapy. ASCT after achieving CR can result in a deeper response with improvement in disease free and overall survival. Disclosures Lacy: celgene: Research Funding. Gertz:celgene: Honoraria; genzyme: Honoraria; millenium: Honoraria; amgen: Honoraria.

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