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1.
Leuk Res Rep ; 16: 100261, 2021.
Article in English | MEDLINE | ID: mdl-34401318

ABSTRACT

Herein we present a rare case of two brothers diagnosed with CML four years apart. Importantly, our case of CML occurrence among siblings is the fifth one reported and the second one investigated by both, conventional cytogenetics and RT-PCR analysis. Moreover, although Ph chromosome was detected in both our patients, RT-PCR revealed the presence of two different BCR-ABL transcripts. Finally, both our patients have been followed for a long period of time offering thus the opportunity to observe the differences in the clinical course.

3.
Oncologist ; 26(7): 597-609, 2021 07.
Article in English | MEDLINE | ID: mdl-33870594

ABSTRACT

BACKGROUND: R-CHOP can cure approximately 75% of patients with primary mediastinal large B-cell lymphoma (PMLBCL), but prognostic factors have not been sufficiently evaluated yet. R-da- EPOCH is potentially more effective but also more toxic than R-CHOP. Reliable prognostic classification is needed to guide treatment decisions. MATERIALS AND METHODS: We analyzed the impact of clinical prognostic factors on the outcome of 332 PMLBCL patients ≤65 years treated with R-CHOP ± radiotherapy in a multicenter setting in Greece and Cyprus. RESULTS: With a median follow-up of 69 months, 5-year freedom from progression (FFP) was 78% and 5-year lymphoma specific survival (LSS) was 89%. On multivariate analysis, extranodal involvement (E/IV) and lactate dehydrogenase (LDH) ≥2 times upper limit of normal (model A) were significantly associated with FFP; E/IV and bulky disease (model B) were associated with LSS. Both models performed better than the International Prognostic Index (IPI) and the age-adjusted IPI by Harrel's C rank parameter and Akaike information criterion. Both models A and B defined high-risk subgroups (13%-27% of patients [pts]) with approximately 19%-23% lymphoma-related mortality. They also defined subgroups composing approximately one-fourth or one-half of the patients, with 11% risk of failure and only 1% or 4% 5-year lymphoma-related mortality. CONCLUSION: The combination of E/IV with either bulky disease or LDH ≥2 times upper limit of normal defined high-risk but not very-high-risk subgroups. More importantly, their absence defined subgroups comprising approximately one-fourth or one-half of the pts, with 11% risk of failure and minimal lymphoma-related mortality, who may not need more intensive treatment such as R-da-EPOCH. IMPLICATIONS FOR PRACTICE: By analyzing the impact of baseline clinical characteristics on outcomes of a large cohort of patients with primary mediastinal large B-cell lymphoma homogeneously treated with R-CHOP with or without radiotherapy, we developed novel prognostic indices which can aid in deciding which patients can be adequately treated with R-CHOP and do not need more intensive regimens such as R-da-EPOCH. The new indices consist of objectively determined characteristics (extranodal disease or stage IV, bulky disease, and markedly elevated serum lactate dehydrogenase), which are readily available from standard initial staging procedures and offer better discrimination compared with established risk scores (International Prognostic Index [IPI] and age-adjusted IPI).


Subject(s)
Antineoplastic Combined Chemotherapy Protocols , Lymphoma, Large B-Cell, Diffuse , Adult , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Cyclophosphamide/therapeutic use , Doxorubicin/therapeutic use , Humans , Lymphoma, Large B-Cell, Diffuse/drug therapy , Prednisone/therapeutic use , Prognosis , Rituximab/therapeutic use , Vincristine/adverse effects
4.
Hematol Oncol ; 39(3): 336-348, 2021 Aug.
Article in English | MEDLINE | ID: mdl-33583077

ABSTRACT

Transplant-ineligible relapsed/refractory (rr) diffuse large B-cell lymphoma (DLBCL) patients represent an unmet medical need. Polatuzumab vedotin (Pola), an anti-CD79b antibody-drug-conjugate (ADG), with bendamustine- rituximab(BR) has recently gained approval for these patients, both in the USA and Europe, based on the GO29365 phase IIb trial. Real-life data with Pola are extremely limited. We report the outcomes of 61 Greek patients, who received Pola-(B)R mainly within a compassionate use program. Treatment was given for up to six 21-day cycles. Bendamustine was omitted in three cases due to previous short-lived responses. Fourty-nine rrDLBCL(efficacy cohort-EC) and 58 rr aggressive B-NHL (safety cohort-SC) patients received at least 1 Pola-BR cycle. Twenty-one (43%) patients of the EC responded with 12/49 (25%) CR and 9/49 (18%) PR as best response. Median progression-free survival, overall survival and duration of response were 4.0, 8.5, and 8.5 months respectively, while 55% of patients experienced a grade ≥3 adverse event, mainly hematologic. Treatment discontinuations and death during treatment were mainly due to disease progression. Twenty-two (41%) patients received further treatment; 11/22 are still alive, including one after CAR-T cells, and two after stem cell transplantation. Our data confirm that Pola-BR is a promising treatment for rrDLBCL patients, inducing an adequate response rate with acceptable toxicity. Pola-BR could be used as bridging therapy before further consolidative treatments.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/administration & dosage , Lymphoma, B-Cell/drug therapy , Lymphoma, B-Cell/mortality , Adult , Aged , Aged, 80 and over , Antibodies, Monoclonal/administration & dosage , Antibodies, Monoclonal/adverse effects , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Bendamustine Hydrochloride/administration & dosage , Bendamustine Hydrochloride/adverse effects , Disease-Free Survival , Female , Greece/epidemiology , Humans , Immunoconjugates/administration & dosage , Immunoconjugates/adverse effects , Male , Middle Aged , Rituximab/administration & dosage , Rituximab/adverse effects , Survival Rate
5.
Ann Hematol ; 100(9): 2279-2292, 2021 Sep.
Article in English | MEDLINE | ID: mdl-33523289

ABSTRACT

End-of-treatment (EoT) PET/CT is used as a guide to omit radiotherapy (RT) patients with primary mediastinal large B-cell lymphoma (PMBCL). We present the mature and extended results of a retrospective study evaluating the prognostic significance of EoT-PET/CT after adequate response to R-CHOP. Among 231 consecutive PMLBCL patients, 182 underwent EoT-PET/CT and were evaluated according to the Deauville 5-point scale (D5PS) criteria. Freedom from progression (FFP) was measured from the time of PET/CT examination. Among 182 patients, 72 (40%) had D5PS score 1 (D5PSS-1), 33 (18%) had 2, 28 (15%) had 3, 29 (16%) had 4, and 20 (11%) had 5. The 5-year FFP was 97, 94, 92, 82, and 44% for D5PSS-1, D5PSS-2, D5PSS-3, D5PSS-4, and D5PSS-5, respectively. Among 105 patients with unequivocally negative PET/CT (D5PSS-1/D5PSS-2), 49 (47%) received RT (median dose 3420 cGy) and 56 (53%) did not with relapses in 0/49 vs. 4/56 patients (2 mediastinum and 2 isolated CNS relapses).The 5-year FFP for those who received RT or not was 100% versus 96%, when isolated CNS relapses were censored (p = 0.159). Among D5PSS-3 patients (27/28 irradiated-median dose 3600 cGy), the 5-year FFP was 92%. The 5-year FFP for D5PSS-4 and D5PSS-5 was 82 and 44%; 44/49 patients received RT (median dose 4000 and 4400 cGy for D5PSS-4 and D5PSS-5). Our study supports the omission of RT in a sizeable fraction of PET/CT-negative patients and definitely discourages salvage chemotherapy and ASCT in patients with PMLBCL who conventionally respond to R-CHOP, solely based on PET/CT positivity in the absence of documented progressive or multifocal disease. The persistence of positive PET/CT with D5PSS < 5 after consolidative RT should not trigger the initiation of further salvage chemotherapy in the absence of conventionally defined PD.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/radiotherapy , Mediastinal Neoplasms/drug therapy , Mediastinal Neoplasms/radiotherapy , Adolescent , Adult , Aged , Cyclophosphamide/therapeutic use , Doxorubicin/therapeutic use , Female , Humans , Lymphoma, Large B-Cell, Diffuse/diagnostic imaging , Male , Mediastinal Neoplasms/diagnostic imaging , Middle Aged , Positron Emission Tomography Computed Tomography , Prednisone/therapeutic use , Retrospective Studies , Rituximab/therapeutic use , Treatment Outcome , Vincristine/therapeutic use , Young Adult
7.
Am J Hematol ; 95(5): 465-471, 2020 05.
Article in English | MEDLINE | ID: mdl-32048329

ABSTRACT

We investigated incidence, characteristics and outcome of patients with macrofocal multiple myeloma (MFMM) treated mainly with novel therapies. Based on definition (BMPCs <20% and lytic lesions/plasmacytomas, without anemia, renal insufficiency or hypercalcemia) we identified 140 patients with MFMM, among 4650 myeloma patients (3%). Twice the number of patients with typical myeloma were used as controls; 60% were <65 years and 70% had advanced bone disease. Plasmacytomas were more frequent in MFMM compared with standard myeloma (68% vs 15%, P < .05). Adverse prognostic parameters (high lactate dehydrogenase, advanced stage, high risk cytogenetics, immunoparesis) were less common in patients with MFMM compared with controls (P < .05); 90% received novel agents and 47% underwent autologous transplantation upfront; 90% achieved an objective response; 70% had at least very good partial response which was significantly higher compared with controls (P < .05). After a median follow-up of 52 months, 33 patients have died. Early death (<12 months) was infrequent in MFMM. Median progression-free survival and overall survival (OS) were 46 and 129 months respectively, both significantly longer compared with controls (P < .001). Proteasome inhibitor (PI)-based therapy was the only independent predictor for OS in the multivariate analysis (HR: 3.9; P < .001). In conclusion, MFMM is a distinct entity presented in young and elderly subjects, characterized by limited bone marrow infiltration, advanced bone disease and frequent presence of plasmacytomas; MFMM patients have less often adverse prognostic features and achieve excellent responses and prolonged OS especially when treated with PI-based therapies. Novel imaging will help in a more accurate classification of this entity.


Subject(s)
Multiple Myeloma/epidemiology , Adult , Aged , Aged, 80 and over , Data Analysis , Female , Greece , Humans , Incidence , Israel , Male , Middle Aged , Retrospective Studies , Treatment Outcome
8.
Ann Hematol ; 98(6): 1457-1466, 2019 Jun.
Article in English | MEDLINE | ID: mdl-30895351

ABSTRACT

The exact role of regulatory T cells (Tregs) in multiple myeloma (MM) has not been yet determined. Data regarding alterations of Tregs during therapy with novel agents (NA), i.e., bortezomib and lenalidomide are conflicted and limited. We evaluated prospectively alterations of Tregs and searched for correlations with disease characteristics, response, and outcome in 29 patients with active MM treated with either bortezomib-dexamethasone (BD; 11 patients) or lenalidomide-dexamethasone (LenDex, 18 patients). Additionally, we recorded changes of lymphocytes subsets and cytokines related to Tregs function and MM biology, i.e., interleukin (IL) 6, 2, 17, and TGF-ß. Compared with controls, patients had significantly higher median levels of Tregs%, IL-6, and IL-17 (p < 0.001). Median CD4 T and B cells frequencies were significantly lower, whereas CD8 T and natural killers were increased compared to controls. In BD group, no significant alterations of Tregs% were observed. Patients treated with LenDex, displayed a significant reduction of Tregs% (p < 0.001) especially those who achieved at least very good partial response (≥vgPR) (p = 0.04). Lymphocyte subsets or cytokines did not significantly change during therapy. In summary, Tregs% are higher in patients with active MM compared with controls, and they significantly decrease after treatment with LenDex but not with BD; After therapy with LenDex, Tregs reduction between baseline and major response correlated with achievement of ≥vgPR suggesting a possible predictive role, that may contribute to therapeutic strategy.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Multiple Myeloma/immunology , T-Lymphocyte Subsets/immunology , T-Lymphocytes, Regulatory/immunology , Adult , Aged , Antineoplastic Combined Chemotherapy Protocols/pharmacology , Bortezomib/administration & dosage , Bortezomib/pharmacology , Cytokines/blood , Dexamethasone/administration & dosage , Dexamethasone/pharmacology , Female , Humans , Lenalidomide/administration & dosage , Lenalidomide/pharmacology , Lymphocyte Count , Male , Middle Aged , Multiple Myeloma/blood , Multiple Myeloma/drug therapy , T-Lymphocyte Subsets/drug effects , T-Lymphocyte Subsets/metabolism , T-Lymphocytes, Regulatory/drug effects , T-Lymphocytes, Regulatory/metabolism , Transforming Growth Factor beta/analysis , Treatment Outcome
9.
Int J Cancer ; 145(2): 559-568, 2019 07 15.
Article in English | MEDLINE | ID: mdl-30650184

ABSTRACT

There is limited data regarding the efficacy and safety of lenalidomide, adriamycin and dexamethasone (RAD) combination on newly diagnosed multiple myeloma (NDMM) patients. There is also scarce information about the effect of lenalidomide on bone metabolism and angiogenesis in NDMM. Thus, we conducted a Phase 2 study to evaluate the efficacy and safety of RAD regimen as induction in transplant-eligible NDMM patients and we studied the effects on bone metabolism and angiogenesis. A total of 45 patients were enrolled. Following four cycles of RAD, the overall response rate was 66.7% and after a median follow up of 29.1 months (range 21.0-34.9), the median survival outcomes have not been reached yet. RAD had a favorable toxicity profile and did not impair stem cell collection. RAD significantly reduced bone resorption markers CTX (p = 0.03) and TRACP-5b (p < 0.01). Interestingly, RAD also increased bone formation markers bone-specific alkaline phosphatase (p = 0.036), procollagen type 1 amino-terminal propeptide (p = 0.028) and osteocalcin (p = 0.026), which has not been described before with lenalidomide-containing regimens in the absence of bortezomib coadministration. Furthermore, the angiogenic cytokines VEGF (p = 0.01), angiogenin (p = 0.02) and bFGF (p < 0.01) were significantly reduced post-RAD induction. Our results suggest that RAD is an effective induction regimen before autologous stem cell transplantation with beneficial effects on bone metabolism and angiogenesis.


Subject(s)
Angiogenic Proteins/metabolism , Bone Resorption/drug therapy , Dexamethasone/administration & dosage , Doxorubicin/administration & dosage , Lenalidomide/administration & dosage , Multiple Myeloma/drug therapy , Adult , Aged , Alkaline Phosphatase/metabolism , Antineoplastic Combined Chemotherapy Protocols/administration & dosage , Antineoplastic Combined Chemotherapy Protocols/pharmacology , Bone Resorption/metabolism , Dexamethasone/pharmacology , Doxorubicin/pharmacology , Drug Therapy, Combination , Female , Fibroblast Growth Factor 2/metabolism , Gene Expression Regulation, Neoplastic/drug effects , Humans , Induction Chemotherapy , Lenalidomide/pharmacology , Male , Middle Aged , Osteocalcin/metabolism , Peptide Fragments/metabolism , Procollagen/metabolism , Ribonuclease, Pancreatic/metabolism , Treatment Outcome , Vascular Endothelial Growth Factor A/metabolism
10.
Blood Cancer J ; 8(3): 31, 2018 03 09.
Article in English | MEDLINE | ID: mdl-29523783

ABSTRACT

We have studied the efficacy and the prognostic impact of novel agents in 50 primary plasma cell leukemia (pPCL) patients registered in our database. Eighty percent of patients were treated upfront with novel agent-based combinations; 40% underwent autologous stem cell transplantation (ASCT). Objective response rate was 76; 38% achieved at least very good partial response (≥vgPR) and this correlated significantly with bortezomib-based therapy plus ASCT. At the time of evaluation, 40 patients had died. Early mortality rate (≤1 month) was 6%. Median progression-free survival (PFS) and overall survival (OS) were 12 months and 18 months respectively, both significantly longer in patients treated with bortezomib-based therapy + ASCT vs. others (PFS: 18 vs. 9 months; p = 0.004, OS: 48 vs. 14 months; p = 0.007). Bortezomib-based therapy + ASCT predicted for OS in univariate analysis. In multivariate analysis, achievement of ≥vgPR and LDH ≥ 300 U/L were significant predictors for OS. These real-world data, based on one of the largest reported national multicenter series of pPCL patients treated mostly with novel agents support that, among the currently approved induction therapies, bortezomib-based regimens are highly effective and reduce the rate of early mortality whereas in combination with ASCT consolidation they prolong OS.


Subject(s)
Bortezomib/administration & dosage , Leukemia, Plasma Cell/mortality , Leukemia, Plasma Cell/therapy , Stem Cell Transplantation , Adult , Aged , Aged, 80 and over , Autografts , Disease-Free Survival , Female , Greece/epidemiology , Humans , Leukemia, Plasma Cell/pathology , Male , Middle Aged , Retrospective Studies , Survival Rate
11.
Transfus Apher Sci ; 54(1): 63-70, 2016 Feb.
Article in English | MEDLINE | ID: mdl-26850930

ABSTRACT

During the last decades, a better understanding of the biology of multiple myeloma (MM) has led to the application of novel treatment strategies for MM patients. The new anti-myeloma regimens produce higher incidence of durable and of better quality responses and they improve overall survival, challenging the dogma of incurable disease, outside the context of allogeneic transplantation. This review presents all these strategies that aim to cure MM, including continuous treatment i.e. induction, consolidation and maintenance, treatment of asymptomatic MM and monitoring minimal residual disease using modern techniques, such as multi-parameter flow cytometry, molecular assays and advanced imaging.


Subject(s)
Hematopoietic Stem Cell Transplantation , Multiple Myeloma/therapy , Humans , Neoplasm, Residual/pathology , Transplantation, Homologous
12.
Ann Hematol ; 94(12): 2033-42, 2015 Dec.
Article in English | MEDLINE | ID: mdl-26420061

ABSTRACT

Involvement of the central nervous system (CNS) is a rare complication of multiple myeloma (MM). Herein, we have described the incidence, characteristics, prognostic factors for post CNS-MM survival, and outcome of CNS-MM and explored the efficacy of novel agents (NA) (thalidomide, bortezomib, lenalidomide) in this setting. Between 2000 and 2013, 31 (0.9 %) out of 3408 newly diagnosed symptomatic MM patients, consecutively diagnosed and treated during the same period in 12 Greek centers, developed CNS-MM (M/F 15/16, median age 59 years, range 20-96 years; newly diagnosed/relapsed-refractory 2/29; median time to CNS-MM diagnosis 29 months). Clinical and laboratory characteristics were retrospectively recorded. Twenty-six percent of patients had circulating plasma cells (PCs) or plasma cell leukemia (PCL) at CNS-MM and 39 % had skull-derived plasmacytomas, suggesting hematological and contiguous spread. Treatment for CNS-MM was offered in 29/31 patients and 11/29 responded (NA 18/29, additional radiotherapy 9/28, intrathecal chemotherapy 13/29). The median post CNS-MM survival was 3 months (95 % CI 1.9-4.1) and did not differ between patients treated with NA and/or radiotherapy vs. others. In the multivariate analysis, prior treatment of MM with NA, extramedullary disease (EMD) during MM course (i.e., plasmacytomas, circulating PCs, or documented PCL) and abnormally high LDH at MM diagnosis were independent prognostic factors, whereas treatment of CNS-MM with NA did not predict for post CNS-MM survival. Despite the relatively limited number of patients due to the rarity of CNS-MM, our results suggest that NA do not seem to improve post CNS-MM survival. Patients with EMD display shortened post CNS-MM survival and should be followed thoroughly.


Subject(s)
Central Nervous System Neoplasms/mortality , Central Nervous System Neoplasms/therapy , Multiple Myeloma/mortality , Multiple Myeloma/therapy , Adult , Aged , Aged, 80 and over , Disease-Free Survival , Female , Greece/epidemiology , Humans , Male , Middle Aged , Survival Rate
13.
Am J Hematol ; 89(8): 803-8, 2014 Aug.
Article in English | MEDLINE | ID: mdl-24757085

ABSTRACT

Solitary plasmacytoma (SP) is a rare plasma cell dyscrasia characterized by the presence of bone or extramedullary plasma cell tumors. The treatment of choice is local radiotherapy (R/T) ± surgical excision. The role of adjuvant chemotherapy (C/T) or novel agents (NA) is uncertain. Data related to prognostic factors are inconclusive. Herein, we describe the clinical features, survival and prognosis of 97 consecutive patients, 65 with bone SP (SBP), and 32 with extramedullary SP (SEP), diagnosed and treated in 12 Greek Myeloma Centers. Objective response rate (≥PR) and complete response (CR) was 91.8% and 61.9%, respectively, and did not differ between the 2 groups. Overall, 38 patients relapsed or progressed to multiple myeloma (MM). After a median follow-up of 60 months, 5 and 10-year overall survival (OS) probability was 92% and 89% in SEP and 86% and 69% in SBP, respectively (P = 0.2). The 5- and 10-year MM-free survival (MMFS) probability was 90% and 70% for patients with SEP vs. 59% and 50% for patients with SBP, respectively (P = 0.054). Overall, the 5- and 10-year OS probability, plasmacytoma relapse-free survival (PRFS), progression-free survival and MMFS was 84% and 78%, 72% and 58%, 58% and 43%, and 70% and 59%, respectively. In the multivariate analysis, prolonged PRFS and young age were positive predictors of OS. Achievement of CR was the only positive predictor of PRFS. Immunoparesis was the only negative predictor of progression to MM. The addition of C/T or NA-based treatment increased toxicity without offering any survival advantage over R/T.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols , Bone Neoplasms/drug therapy , Multiple Myeloma/drug therapy , Neoplasm Recurrence, Local/drug therapy , Plasmacytoma/drug therapy , Adolescent , Adult , Aged , Aged, 80 and over , Anthracyclines/administration & dosage , Bone Neoplasms/diagnosis , Bone Neoplasms/mortality , Bone Neoplasms/pathology , Boronic Acids/administration & dosage , Bortezomib , Chemotherapy, Adjuvant , Dexamethasone/administration & dosage , Disease Progression , Female , Greece , Humans , Male , Melphalan/administration & dosage , Middle Aged , Multiple Myeloma/diagnosis , Multiple Myeloma/mortality , Multiple Myeloma/pathology , Multivariate Analysis , Neoplasm Recurrence, Local/diagnosis , Neoplasm Recurrence, Local/mortality , Neoplasm Recurrence, Local/pathology , Plasmacytoma/diagnosis , Plasmacytoma/mortality , Plasmacytoma/pathology , Prognosis , Pyrazines/administration & dosage , Remission Induction , Retrospective Studies , Survival Analysis , Treatment Outcome
14.
Am J Hematol ; 89(2): 145-50, 2014 Feb.
Article in English | MEDLINE | ID: mdl-24123068

ABSTRACT

Plasma cell leukemia (PCL) is a rare and aggressive plasma cell disorder, with poor outcome. Bortezomib-based regimens (BBR) are highly effective in myeloma, but there is limited information about their efficacy and safety in PCL. Thus, we retrospectively collected data from 42 consecutive PCL patients (25 with primary PCL-pPCL and 17 with secondary PCL-sPCL) to explore the role of BBR in this entity. BBR were administered in 29 of 42 patients, while 6 of 25 patients with pPCL underwent autologous transplantation. Objective response (≥partial response) was significantly higher in patients treated with BBR versus conventional therapies (69% vs. 30.8%, P = 0.04); 27.5% of patients treated with BBR achieved at least very good partial response (vgPR). The highest ORR was observed in pPCL patients treated with BBR (88.9%; ≥vgPR: 33.3%). In BBR-group, grade 3 of 4 hematological, neurological and renal toxicity and neutropenic infections were observed in 41.4%, 7%, 3.4%, and 31%, respectively. With a median follow-up of 51 months, median overall survival (OS) for patients treated with BBR versus conventional therapies was 13 versus 2 months (P < 0.007). Median OS of patients with pPCL and sPCL treated with BBR was 18 and 7 months, respectively (P < 0.001). In the multivariate analysis normal PLTs, treatment with BBR and high quality response were the only powerful predictors for survival. Our study carrying the longest reported median follow-up, demonstrated that treatment of PCL with BBR induces high response rates and prolongs survival over conventional therapies, regardless of additional autologous transplantation rescue or established high risk features, with manageable toxicity.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Leukemia, Plasma Cell/drug therapy , Leukemia, Plasma Cell/mortality , Adult , Aged , Aged, 80 and over , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Boronic Acids/administration & dosage , Bortezomib , Female , Humans , Leukemia, Plasma Cell/diagnosis , Leukemia, Plasma Cell/etiology , Male , Middle Aged , Neoplasm Staging , Prognosis , Pyrazines/administration & dosage , Retrospective Studies , Treatment Outcome
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