I131-tositumomab monotherapy as frontline treatment for follicular lymphoma: Updated results after a median follow-up of 8 years

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 8033-8033 ◽  
Author(s):  
M. S. Kaminski ◽  
J. Estes ◽  
M. Tuck ◽  
C. W. Ross ◽  
R. L. Wahl
Keyword(s):  
Follicular Lymphoma ◽  
Single Agent ◽  
Progression Free Survival ◽  
Single Institution ◽  
Free Survival ◽  
Frontline Treatment ◽  
Anti Cd20 ◽  
High Degree ◽  
The Impact

8033 Background: Monoclonal antibody-based therapies are improving the outcome for patients (pts) with follicular lymphoma (FL). Radioimmunotherapy has been found to be effective for pts with relapsed/refractory disease, but even more so when used as frontline treatment. Methods and Results. We previously reported the results of a phase II, single-institution, study of anti-CD20 I-131- Tositumomab (Bexxar) given as a single agent and as a single one-week treatment for 76 pts with Stage 3 or 4 FL (NEJM 352:441, 2005). An overall response (OR) rate and complete remission (CR) rate of 95% and 75%, respectively, were observed. With a median follow-up of 5.1 yrs, 5-yr overall survival (OS) and progression-free survival (PFS) were 89% and 59%, respectively, with a median PFS reached at 6.1 yrs. We now report on this pt cohort after a median follow-up of 7.93 yrs. The 8-year and 10-yr OS is estimated (by KM) now at 86% and 8-yr PFS is 50% (95% CI: 38.8 - 61.7%). Only 3 additional relapses have occurred in the additional follow-up period (at 8.0, 8.3, and 9.2 years) in those with CRs. The 8-yr PFS for the 57 pts who achieved CR is now 64%. The median for PFS has now being reached for CRs at 9.2 yrs. When the impact of baseline FLIPI scores were analyzed, only 8-yr OS was significantly affected when low-risk (LR) and intermediate-risk (IR) categories were combined and compared to the high-risk (HR) category (92% vs. 75%; p = 0.029). The 8-yr PFS for LR + IR pts was 56% vs. 35% for HR pts (p = 0.317). 27 of the 76 total pts (35%) had HR scores. Of additional importance, no cases of MDS or AML have yet been observed. Other longterm toxicities including thyroid status and second non-hematologic cancers will be updated at the meeting. Conclusions. These data underscore the high degree of effectiveness and durability of remissions achieved with a single, one-week course of frontline Bexxar and should serve as a benchmark for comparison to other studies using more prolonged and toxic treatments, including those combining unlabeled or radiolabeled antibodies with chemotherapy. No significant financial relationships to disclose.

The impact of FLIPI on outcome of frontline treatment with single-agent I-131 tositumomab for follicular lymphoma (FL)

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 7509-7509 ◽  
Author(s):  
M. S. Kaminski ◽  
D. Hamstra ◽  
J. Estes ◽  
R. Wahl
Keyword(s):  
High Risk ◽  
Bone Marrow Involvement ◽  
Single Agent ◽  
Progression Free Survival ◽  
Complete Response ◽  
Intermediate Risk ◽  
Frontline Treatment ◽  
Baseline Variable ◽  
The Impact

7509 Background: The FLIPI is potentially useful in predicting clinical outcome and comparing treatment results among clinical studies in FL. We recently reported the results of I-131 tositumomab as frontline treatment in 76 pts with advanced-stage FL (NEJM 325:441, 2005). A single 1-week course resulted in a 95% and a 75% overall and complete response (CR) rate, respectively, and at a median follow-up of 5.1 years median progression-free survival (PFS) was 6.1 yrs. In multivariate analyses, bone marrow involvement was the only baseline variable that had a significant effect on PFS. Methods: To evaluate whether baseline FLIPI scores in this study could predict outcome and to compare this pt population with that in other frontline studies, the records of all 76 patients were reviewed. Results: FLIPI scores were available for 74 of the 76 pts: 11 pts (15%) low risk, 37 (50%) intermediate risk, and 26 (35%) high risk. CR rates for each risk group were 82%, 73%, and 73%, respectively. 5-yr PFS were 63% (35–92%, 95% CI), 63% (47–78%), and 52% (33–71%), respectively, p = 0.322. Grouping low + intermediate risk vs. high for PFS: p = 0.134. 5-yr overall survival (OS) rates were 100%, 95% (87–100%), 78% (62– 93%), respectively, p = 0.072, but grouping low + intermediate risk vs. high p = 0.028. A comparison to other frontline studies is below. Conclusions: The FLIPI did not predict for PFS or OS in FL pts treated with single-agent I-131 Tositumomab. However, an OS difference was seen when low + intermediate risk pts were grouped and compared with high risk pts. The distribution of FLIPI scores amongst pts in this study is similar to that observed in other front-line FL studies. Further studies exploring single-agent radioimmunotherapy vs. chemo/radioimmunotherapy combinations are warranted. [Table: see text] [Table: see text]

Efficacy of ocaratuzumab (AME-133v) in relapsed follicular lymphoma patients refractory to prior rituximab.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 8081-8081 ◽  
Author(s):  
Jennifer L. Wayne ◽  
Kristen N. Ganjoo ◽  
Brad L. Pohlman ◽  
Sven De Vos ◽  
Ian W. Flinn ◽  
...  
Keyword(s):  
Follicular Lymphoma ◽  
Binding Affinity ◽  
Overall Response Rate ◽  
Single Agent ◽  
Progression Free Survival ◽  
Fold Increase ◽  
Dose Escalation Study ◽  
Free Survival ◽  
Dependent Cell ◽  
Anti Cd20

8081 Background: Ocaratzumab, previously known as AME-133v, is a humanized next-generation anti-CD20 monoclonal antibody. It has been optimized with a 13 to 20-fold increase in binding affinity to CD20 and improved binding to the low-affinity (F/F and F/V) polymorphisms of FcγRIIIa (CD16), which are thought to predict lower response rates and shorter duration of responses to rituximab. Methods: In a phase I dose escalation study in relapsed follicular lymphoma (FL) patients, ocaratuzumab was well-tolerated at doses up to 375 mg/m2 (Forero-Torres et al. CCR 2012). In a follow-on phase II trial, 44 patients with relapsed FL following prior rituximab and the low-affinity FcγRIIIa polymorphism (F-carriers) received 375 mg/m2 of ocaratuzumab weekly for 4 doses. In this study, overall response rate (ORR) was 36% and median progression free survival (PFS) was 91 weeks (Ganjoo et al. Haematologica 2011). Results: Amongst the 56 patients receiving 100 and 375 mg/m2 of ocaratuzumab, 8 patients had a previous time to progression of ≤ 180 days following their last rituximab treatment. These patients had a median of 2 prior rituximab treatments, (range 1-6 treatments), and median PFS following last treatment of 159 days. Five of the 8 patients showed a longer PFS after ocaratuzumab administration, compared with last rituximab treatment. All 5 patients expressed the homozygous low-affinity genotype of FcγRIIIa (F/F). At the time of study closure, 3 of the patients were still in remission (indicated by * in the table). Conclusions: This retrospective analysis suggests that ocaratuzumab may be non-cross-resistant to rituximab in patients with the low-affinity FcγRIIIa polymorphism. Prolonged PFS in selected patients following ocaratuzumab suggests that the increased binding affinity to CD16 and improved antibody-dependent cell-mediated cytotoxicity (ADCC) of this antibody is clinically relevant. As a single agent, ocaratuzumab may provide prolonged clinical benefit in relapsed FL patients and a clinical trial comparing ocaratuzumab to rituximab is in preparation. [Table: see text]

Promising Efficacy with the New Anti-CD20 Antibody GA101 In Heavily Pre-Treated NHL Patients – Updated Results with Encouraging Progression Free Survival (PFS) Data From a Phase II Study In Patients with Relapsed/Refractory Indolent NHL (iNHL)

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 2868-2868 ◽  
Author(s):  
Gilles Andre Salles ◽  
Franck Morschhauser ◽  
Catherine Thieblemont ◽  
Philippe Solal-Céligny ◽  
Thierry Lamy ◽  
...  
Keyword(s):  
Febrile Neutropenia ◽  
Phase Ii ◽  
Single Agent ◽  
Progression Free Survival ◽  
Survival Advantage ◽  
High Dose ◽  
Free Survival ◽  
Cd20 Antibody ◽  
Anti Cd20

Abstract Abstract 2868 Background: GA101 is the first type II, glycoengineered and humanized monoclonal anti-CD20 antibody with Phase I results (NHL/CLL) (Salles, ASH 2008, 2009; Cartron, EHA 2009; Morschhauser, ASH 2009; Sehn, ASH 2009) and phase II results (Indolent NHL) previously reported (EHA 2010). Based on an additional 1 year follow-up period, we report updated efficacy and safety results with single agent GA101, presenting new and encouraging progression free survival (PFS) data indicating a survival advantage of those patients randomized to the high dose cohort (1600/800mg). Methods: 40 eligible patients were randomized to receive GA101 in a low-dose (LD, n=18) or a high dose (HD, n=22) cohort. GA101 was given on d1, d8, d22 and q21 days for total of 9 infusions. In the LD cohort, GA101 was given 400mg all infusions; in the HD cohort, d1 and d8 at 1600mg and 800mg for subsequent infusions. Primary endpoint was end of treatment response (EOR), assessed 4 weeks after last infusion (44 weeks after treatment start). Secondary objectives were safety, pharmacokinetics and PFS. Results: Patients (Table 1) were heavily pre-treated (median 3 prior therapies) with 55% of patients not responding to or relapsing within six months after a previous rituximab-containing regimen (rituximab refractory). There were no significant differences in demographics and baseline tumour burden between the two cohorts and 75% of patients completed all scheduled 9 infusions. EOR was 17% (3 PR, 6 SD, 7 PD, 2 UNK) in the LD cohort, and 55% (2 CR, 10 PR, 6 SD, 4 PD) in the HD cohort. Of note, 6/22 rituximab-refractory patients (5 HD, 1 LD) responded, with a EOR response of 50% in rituximab-refractory patients in the HD cohort (5/10). Responses occurred across all FcγIIIR genotypes in both cohorts: of 3 responders in LD, 2 patients with F/F genotype, other unknown; of 12 responders in HD; 5 F/F, 7 F/V. Responding patients from both LD and HD groups appeared to have higher GA101 plasma concentrations compared to non-responding patients. Median PFS was 6 months [1.1-16.9+ months] and 11.3 months [1.8-14.2+ months] for the LD and HD cohorts respectively (Hazard ratio 0.55 [95% CI 0.24;1.27]). Of 15 responding patients at EOR, 9 have an ongoing response in follow-up (LD=2, HD=7), with 2 PRs converting to CR (LD=1, HD=1) and another PR to CRu (HD). In addition 2 patients (LD=1, HD=1) in follow-up converted from EOR SD to PR, one patient with an ongoing response and the other subsequently relapsing, therefore 10 patients currently have an ongoing response. GA101 was well tolerated in both cohorts with the most common AEs being infusion related reactions (LD 72%, HD 73% of patients), mostly of G1-2. During treatment, related G3-4 hematological AEs were transient neutropenia (n = 3 in HD), febrile neutropenia (n=1 in HD) and thrombocytopenia (n = 1 in HD), four patients experienced at least one G3-4 Infection (LD n=1, HD n=3). Nine patients experienced a total 12 SAEs during treatment period, with 4 related to GA101 (HD n=4; herpes zoster, febrile neutropenia, pancreatitis, neutropenia) and 2 patients in the additional follow-up period, with SAEs of pyrexia (LD) and bacteraemia (HD), both unrelated to GA101. In addition, no B-cell recovery has been observed to date. Conclusion: GA101 single agent is well tolerated, with promising efficacy and provides very encouraging PFS data, in this group of heavily pre-treated relapsed and refractory iNHL patients, indicating a survival advantage for those patients in the HD cohort (1600/800mg). Disclosure: Salles: Roche: Consultancy, Honoraria. Morschhauser:Roche: Consultancy, Honoraria. Wenger:Roche: Employment. Birkett:Roche: Employment. Cartron:Roche: Consultancy, Honoraria; GSK: Honoraria.

A Polymorphism in the C1qA Component of Complement Correlates with Prolonged Complete Remission Following Rituximab Therapy of Follicular Lymphoma.

Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 778-778 ◽  
Author(s):  
Emilian Racila ◽  
Wen-Kai Weng ◽  
James E. Wooldridge ◽  
Brian K. Link ◽  
Ronald Levy ◽  
...  
Keyword(s):  
Complete Remission ◽  
Follicular Lymphoma ◽  
Single Agent ◽  
Progression Free Survival ◽  
Time To Progression ◽  
Free Survival ◽  
Relative Risks ◽  
Complete Clinical Remission ◽  
Duration Of Response ◽  
Anti Cd20

Abstract There is indirect but intriguing evidence that complement plays a role in the clinical response to rituximab and other mAb-based therapies of cancer. We identified a non-coding polymorphism in the C1qA component of complement that appears to result in a post-translational splice variant of the C1qA protein. We examined this polymorphism in 90 patients with follicular lymphoma who were treated with single agent rituximab to assess whether a correlation exists with clinical efficacy. The presence of an A versus a G allele at the C1qA[276] locus was determined using restriction fragment length polymorphism analysis by investigators blinded to the clinical outcome of the patients. The molecular and clinical data was then analyzed according to C1qA polymorphism, including measurement of radiographic response and duration of response, using methods similar to those used to evaluate the correlation between polymorphisms in CD16/CD32 genes and clinical outcome. No statistically significant difference in response rate was found based on C1qA polymorphism. However, prolonged remission was noted among those subjects that achieved remission (either PR or CR) for individuals who were carriers of the A allele at the C1qA[276] locus (AA or AG) compared to homozygous GG subjects. The strongest correlation was found among those subjects that achieved a complete remission to single agent rituximab. In this group, GG subjects had a time to progression of 250 days, while AA /AG subjects had time to progression of 830 days (HR=4.1, 95% CI=2.1–96.9). Multivariate Cox regression analysis of the joint effects of the C1qA, CD32 and CD16 polymorphisms showed that C1q[276] A allele was an independent factor for good prognosis, while FcgRIIIa 158 phenylalanine carrier and FcgRIIa 131 arginine carrier indicated poor survival. Thus, the relative risk was 0.2 for C1qA[276] AA/AG versus GG after controlling for CD32 and CD16 polymorphisms. The relative risks were 4.8 for CD32 HR versus HH and 6.16 for CD32 RR versus HH after controlling for complement and CD16 polymorphisms. The relative risks were 4.57 for CD16 VF against VV and 3.69 for CD16 FF versus VV after controlling for complement and CD32 polymorphisms. These data suggest polymorphisms in C1qA may impact on duration of response to rituximab therapy of follicular lymphoma. Ongoing studies are expanding this cohort, assessing whether this polymorphism correlates clinically with outcome in other malignancies or with other therapeutic approaches in lymphoma patients, and exploring the functional significance of this C1qA polymorphism. If further studies confirm that C1qA genetic polymorphisms correlate with duration of response to rituximab, it will have major implications on our understanding of the role of complement in the immune response to lymphoma, and on development of the next generation of mAb-based cancer treatments. Total AA+AG GG p (log-rank test) TTP=Median time to progression (days) All Subjects 90 70 20 Responders 59 46 13 CR 27 22 5 TTP Overall 177 173 191 0.64 TTP Responders 352 456 334 0.12 TTP CR 798 830 250 0.007 Complement C1qA polymorphism associates with freedom from progression in follicular lymphoma patients who achieve a CR after anti-CD20 therapy. Progression-free survival logrank curves were plotted by C1qA[276] AA and AG vs GG genotype. Cheson criteria were used to estimate complete clinical remission after one round of anti-CD20 therapy. Complement C1qA polymorphism associates with freedom from progression in follicular lymphoma patients who achieve a CR after anti-CD20 therapy. Progression-free survival logrank curves were plotted by C1qA[276] AA and AG vs GG genotype. Cheson criteria were used to estimate complete clinical remission after one round of anti-CD20 therapy.

Evolution of Surgical Approaches in the Treatment of Petroclival Meningiomas: A Retrospective Review

2007 ◽  
Vol 61 (suppl_5) ◽  
pp. ONS202-ONS211 ◽  
Author(s):  
Nicholas C. Bambakidis ◽  
U. Kumar Kakarla ◽  
Louis J. Kim ◽  
Peter Nakaji ◽  
Randall W. Porter ◽  
...  
Keyword(s):  
Survival Rates ◽  
Progression Free Survival ◽  
Surgical Approaches ◽  
Single Institution ◽  
Short Term ◽  
Total Resection ◽  
Free Survival ◽  
Petroclival Meningioma ◽  
Petroclival Meningiomas

Abstract Objective: We examined the surgical approaches used at a single institution to treat petroclival meningioma and evaluated changes in method utilization over time. Methods: Craniotomies performed to treat petroclival meningioma between September of 1994 and July of 2005 were examined retrospectively. We reviewed 46 patients (mean follow-up, 3.6 yr). Techniques included combined petrosal or transcochlear approaches (15% of patients), retrosigmoid craniotomies with or without some degree of petrosectomy (59% of patients), orbitozygomatic craniotomies (7% of patients), and combined orbitozygomatic-retrosigmoid approaches (19% of patients). In 18 patients, the tumor extended supratentorially. Overall, the rate of gross total resection was 43%. Seven patients demonstrated progression over a mean of 5.9 years. No patients died. At 36 months, the progression-free survival rate for patients treated without petrosal approaches was 96%. Of 14 patients treated with stereotactic radiosurgery, none developed progression. Conclusion: Over the study period, a diminishing proportion of patients with petroclival meningioma were treated using petrosal approaches. Utilization of the orbitozygomatic and retrosigmoid approaches alone or in combination provided a viable alternative to petrosal approaches for treatment of petroclival meningioma. Regardless of approach, progression-free survival rates were excellent over short-term follow-up period.

Clinical outcome of patients with follicular lymphoma receiving chemoimmunotherapy in the PRIMA study is not affected by FCGR3A and FCGR2A polymorphisms

Blood ◽  
2012 ◽  
Vol 120 (13) ◽  
pp. 2650-2657 ◽  
Author(s):  
Hervé Ghesquières ◽  
Guillaume Cartron ◽  
John Francis Seymour ◽  
Marie-Hélène Delfau-Larue ◽  
Fritz Offner ◽  
...  
Keyword(s):  
Single Nucleotide Polymorphisms ◽  
Follicular Lymphoma ◽  
Response Rate ◽  
Single Agent ◽  
Progression Free Survival ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Free Survival ◽  
Rituximab Maintenance

Abstract In patients with follicular lymphoma treated with single-agent rituximab, single nucleotide polymorphisms in the FCGR3A gene are known to influence response and progression-free survival. The prognostic role of FCGR3A and FCGR2A polymorphisms in patients with follicular lymphoma treated with rituximab and chemotherapy combination remains controversial and has not been evaluated in the context of rituximab maintenance. FCGR3A and FCGR2A single nucleotide polymorphisms were evaluated in, respectively, 460 and 455 patients treated in the PRIMA study to investigate whether these were associated with response rate and patient outcome after rituximab chemotherapy induction and 2-year rituximab maintenance. In this representative patient cohort, complete and unconfirmed complete responses after rituximab chemotherapy were observed in 65%, 67%, 66% (P = .86) and 60%, 72%, 66% (P = .21) of FCGR3A VV, VF, FF and FCGR2A HH, HR, RR carriers, respectively. After 2 years of rituximab maintenance (or observation), response rates did not differ among the different genotypes. Progression-free survival measured from either treatment initiation or randomization to observation or maintenance was not influenced by these polymorphisms. These data indicate that FCGR3A and FCGR2A polymorphisms do not influence response rate and outcome when rituximab is combined with chemotherapy or used as maintenance treatment. The PRIMA study is registered at www.clinicaltrials.gov as NCT00140582.

Anemia before and during concurrent chemoradiotherapy in patients with cervical carcinoma: Effect on progression-free survival

2003 ◽  
Vol 13 (5) ◽  
pp. 633-639 ◽  
Author(s):  
A. Obermair ◽  
R. Cheuk ◽  
K. Horwood ◽  
M. Neudorfer ◽  
M. Janda ◽  
...  
Keyword(s):  
Cervical Carcinoma ◽  
Concurrent Chemoradiotherapy ◽  
Progression Free Survival ◽  
Figo Stage ◽  
Tumor Stage ◽  
Free Survival ◽  
Parametrial Involvement ◽  
The Impact ◽  
Relevant Factors

To determine the impact of anemia before and during chemoradiation in patients with cervical cancer, we collected data on hemoglobin (Hb) levels before and during treatment from 60 unselected patients with cervical carcinoma. All patients had FIGO stage IB to IVA disease and were treated with concurrent chemoradiation for the aim of cure. Patients with an Hb value below or equal to the lower 25th quartile were considered anemic. Progression-free survival (PFS) was evaluated by univariate and multivariate analyses. After a median follow-up of 26.3 months, 20 patients developed disease progression. The lowest Hb during chemoradiation (nadir Hb), the stage of disease, and parametrial involvement were correlated significantly with PFS. On multivariate analysis, the nadir Hb (relative risk [RR] 0.29) and tumor stage (RR 3.4) remained the only prognostically relevant factors predicting PFS. At 60 months the PFS was 39.1% for anemic patients and 48.0% for nonanemic patients (P < 0.0002). In patients undergoing chemoradiation for cervical carcinoma, a low nadir Hb is highly predictive of shortened PFS, whereas the Hb before treatment is prognostically not significant.

The role of obinutuzumab in the management of follicular lymphoma

2019 ◽  
Vol 15 (31) ◽  
pp. 3565-3578 ◽  
Author(s):  
Jenny O’Nions ◽  
William Townsend
Keyword(s):  
Clinical Trials ◽  
Follicular Lymphoma ◽  
Progression Free Survival ◽  
Free Survival ◽  
Cd20 Antibody ◽  
Anti Cd20 ◽  
Almost All ◽  
Cd20 Antibodies

The outcomes for follicular lymphoma (FL) have improved significantly in recent years. This has been driven by an improved understanding of the pathobiology of FL and the development of therapeutic anti-CD20 antibodies. Combining rituximab with chemotherapy, coupled with its use as maintenance therapy, has contributed to significant improvements in disease control and progression-free survival. However, FL remains incurable and almost all patients invariably relapse. Therefore, there remains a need to develop novel therapeutic options and optimize existing regimens. Obinutuzumab (a first-in-class, glycoengineered, humanized type 2 anti-CD20 antibody) has been evaluated in a number of clinical trials. In this review, we will summarize the evaluable results of clinical trials investigating the efficacy of obinutuzumab in the treatment of FL.

R-FND Followed by Radioimmunotherapy for High-Risk Follicular Lymphoma

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 3056-3056 ◽  
Author(s):  
Peter McLaughlin ◽  
Sattva Neelapu ◽  
Michelle Fanale ◽  
Maria Rodriguez ◽  
Ana Ayala ◽  
...  
Keyword(s):  
High Risk ◽  
Follicular Lymphoma ◽  
International Prognostic Index ◽  
Prognostic Index ◽  
Ibritumomab Tiuxetan ◽  
Free Survival ◽  
Grade 3 ◽  
Anti Cd20 ◽  
Better Than

Abstract Follicular lymphoma (FL) patients, (pts) with high-risk features using the FL International Prognostic Index (FLIPI) have an expected 5-year survival of only about 50% with conventional therapy. With the incorporation of anti-CD20 monoclonal antibody (mAb) therapy, results are improving (e.g., Buske, Blood2006; 108: 1504). Starting in 2003, we have treated high-risk (FLIPI ≥3) FL pts with R-FND (rituximab, fludarabine, mitoxantrone, dexamethasone) for 4 cycles, followed by radioimmunotherapy (RIT) with ibritumomab tiuxetan, and subsequent rituximab maintenance. Results for the first 35 pts are: complete (CR) and partial (PR) remission 83% and 14%; 3-year overall (OS) and failure-free survival (FFS) 89% and 74% (median follow-up 24 mo.). RIT converted 5 PR pts to CR. Toxicity was mainly hematologic. Five pts did not receive RIT, one because of neutropenia after R-FND. Following RIT, platelet and neutrophil nadirs were 28 and 0.3, occurring at 4–7 weeks. 16 pts required transfusions, and 27 received growth factors. 13 pts had infections, only 2 of which were grade 3. Recovery occurred by 3 weeks in most, with prolonged cytopenias in 6. There has been 1 case of myelodysplasia. In conclusion, the additional complexity of this RIT intensification strategy is warranted in this high-risk FL population, resulting in OS and FFS outcomes that are better than non-mAb therapies, and at least as good as published chemotherapy-rituximab combination therapy.

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