scholarly journals Impact of Light Chain Isotype on Clinical Features and Outcomes in Systemic AL Amyloidosis

Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 4726-4726
Author(s):  
Madeleine Hopson ◽  
Divaya Bhutani ◽  
Shawn M Sarkaria ◽  
Mathew Maurer ◽  
Jan Griffin ◽  
...  

Abstract Purpose: In systemic AL amyloidosis, light chain (LC) isotype has been shown to predict outcome in patients undergoing upfront autologous transplantation. However, less than one-third of newly diagnosed AL patients are transplant-eligible. The objective of our study was to characterize the relationship between LC isotype, organ involvement, response, and survival in patients with newly diagnosed AL amyloidosis irrespective of transplant-eligibility. Methods: We performed a retrospective cohort study on 112 patients with AL amyloidosis who had treatment records at Columbia University Irving Medical Center (CUIMC) between 2015-2019. Two-sided Fisher's exact test was used for categorical variables and two-sided Wilcoxon rank sum test was used for continuous variables. Survival analysis was done using Kaplan Meier method. Overall survival (OS) was the time from randomization to death due to any cause. Event-free survival (EFS) was the time to initiation of a subsequent line of therapy or death due to any cause, whichever was earlier. Two-sided log-rank test was used to test differences between survival curves. Results: Kappa LC isotype was seen in 26% of patients. The proportion of patients with Mayo 2004 stage IIIA or IIIB disease in kappa and lambda isotype was 33% and 35% respectively (p=0.91). Bortezomib-based and daratumumab-based initial therapy was administered in 70% and 8% of patients respectively, with 36% having auto-transplant as part of first-line therapy. Patients with kappa LC isotype had a significantly higher baseline difference in free light chain (dFLC) and involved/uninvolved serum free light chain ratio (sFLCr) compared to lambda (median dFLC, 61.5 vs 21.6 mg/dl respectively, p=0.02; and median sFLCr, 63.5 vs 10.6 respectively; p<0.01). Kappa LC isotype was also associated with a near-significant higher bone marrow plasma cell (BMPC) burden at baseline (median BMPCs, 20% vs 10% respectively; p=0.06). Patients with lambda LC isotype had a significantly higher incidence of kidney involvement compared to kappa (64% vs 38% respectively, p=0.02). There was no significant difference in the incidence of t(11;14) between the two groups. The incidence of hematologic very good partial response or better (≥VGPR), involved free light chain less than 20 mg/dl (iFLC<20), and dFLC less than 10 mg/dl (dFLC<10) at the end of first-line therapy was similar in the two groups (Table in Figure 1). There was no difference in cardiac or renal response rates between the two groups. The proportion of patients requiring a subsequent line of therapy in kappa and lambda isotype was 41.4% and 39.8% respectively (p=0.88). At a median follow-up of 43 months for surviving patients, there was no significant difference in event-free survival (hazard ratio (HR) [kappa/lambda]: 0.76 [0.43-1.38]; p=0.37). However, there was a non-significant trend toward superior OS (HR [kappa/lambda]: 0.47 [0.18-1.23], p=0.12; 4-year OS: 86% vs 67% respectively) in patients with kappa LC isotype. Achievement of hematologic ≥VGPR, iFLC<20 mg/dl, and dFLC<10 mg/dl at end of first-line therapy was associated with a superior OS in our cohort irrespective of light chain isotype. Conclusion: Lambda AL amyloidosis is associated with significantly higher renal involvement compared to kappa. Despite a higher baseline disease burden (dFLC, sFLCr, and percent BMPC) in kappa compared to lambda, there was a trend toward superior OS in the former, which may imply decreased tissue toxicity of kappa FLCs. Further studies should investigate proteomic signatures and immunoglobulin gene usage according to light chain isotype and correlation with clinical phenotype. Figure 1 Figure 1. Disclosures No relevant conflicts of interest to declare.

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 3227-3227
Author(s):  
Eli Muchtar ◽  
Angela Dispenzieri ◽  
Nelson Leung ◽  
Francis K. Buadi ◽  
David Dingli ◽  
...  

Abstract Introduction: Light chain burden in light chain (AL) amyloidosis is often low, making accurate response assessment challenging. Methods: AL amyloidosis patients achieving very good partial or complete response to first line therapy and had serial sFLC studies during and after completion of therapy were included (n=396). Involved free light chain (iFLC), difference in involved-to-uninvolved free light chains (dFLC) and sFLC ratio (sFLCR) were assessed at the end of first line therapy and at nadir iFLC. Survival analysis was done using the Kaplan-Meier method. Hematological progression-free survival (hemPFS) was defined as the time from diagnosis until hematological progression or death, where patients known to be alive and progression-free at the end of follow-up were censored. Hematological progression was defined according to consensus criteria or upon initiation of second line therapy, whichever came first. Results: The median iFLC and dFLC at the end of therapy was 1.7 mg/dL and 0.5 mg/dL, respectively. sFLCR normalization occurred in 70% of patients. iFLC ≤2 mg/dL and dFLC ≤0.5 mg/dL were associated with a longer hemPFS compared to their counterparts (Figure). Only iFLC ≤2 mg/dL was associated with a significantly longer overall survival (Figure). sFLCR normalization did not predict hemPFS or overall survival. Organ response was predicted by iFLC ≤2 mg/dL and dFLC ≤0.5 mg/dL (Table), with best discrimination seen with iFLC ≤2 mg/dL. Organ response was not predicted by sFLC normalization (Table). The median nadir iFLC was 1.4 mg/dL and was reached 3.9 months from the end of therapy, longer in transplanted patients compared to patients treated with non-transplant regimens (7.3 vs 1.8 months, respectively; P<0.001). iFLC ≤2 mg/dL at the completion of therapy and nadir iFLC reached >12 months from the end of therapy were favorable predictors of hemPFS/OS in a multivariate analysis. Conclusion: iFLC at the end of first line therapy better predicts for organ response and survival than dFLC among deep responders. Normalization of sFLCR does not predict for organ response or survival and should not be used as measure of therapeutic efficacy. Figure. Figure. Disclosures Dispenzieri: Celgene, Takeda, Prothena, Jannsen, Pfizer, Alnylam, GSK: Research Funding. Dingli:Alexion Pharmaceuticals, Inc.: Other: Participates in the International PNH Registry (for Mayo Clinic, Rochester) for Alexion Pharmaceuticals, Inc.; Alexion Pharmaceuticals, Inc.: Other: Participates in the International PNH Registry (for Mayo Clinic, Rochester) for Alexion Pharmaceuticals, Inc.; Millennium Takeda: Research Funding; Millennium Takeda: Research Funding. Kapoor:Celgene: Research Funding; Takeda: Research Funding. Russell:Vyriad: Equity Ownership. Kumar:Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; KITE: Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Membership on an entity's Board of Directors or advisory committees, Research Funding; AbbVie: Membership on an entity's Board of Directors or advisory committees, Research Funding. Gertz:Alnylam: Honoraria; celgene: Consultancy; Ionis: Honoraria; Abbvie: Consultancy; annexon: Consultancy; janssen: Consultancy; spectrum: Consultancy, Honoraria; Research to Practice: Consultancy; Medscape: Consultancy; Apellis: Consultancy; Teva: Consultancy; Amgen: Consultancy; Prothena: Honoraria; Physicians Education Resource: Consultancy.


Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 4707-4707 ◽  
Author(s):  
Andres Palacios ◽  
Mayda Navarrete ◽  
Laura Gallur ◽  
Javier Zuazu ◽  
Cristina Barrenetxea ◽  
...  

Abstract Introduction. CHOP plus Rituximab has become the standard treatment for patients with aggressive B-cell lymphoma - particularly DLBCL -, after having shown a better response rate and event free survival over CHOP. However, a number of patients are resistant or relapse (R/R) after a good response. The aim of this study is to assess the efficacy of different Rituximab-containing regimens as salvage therapy in refractory/relapsed (R/R) patients with aggressive lymphoma who had been treated with R-CHOP or R-CHOP-like regimens as first-line therapy. Patients and Methods. Thirty-six consecutive patients (34 evaluable for response) from the the same institution were reviewed. Twenty-five patients had diffuse large B-cell lymphoma, 4 mantle-cell lymphoma, and 7 Grade 3b follicular lymphoma. Patients received R-CHOP (n=21), DA-R-EPOCH (n=12) orR-Hyper-CVAD (n=3) as first-line therapy. The following salvage regimens were used in this study: R-ESHAP (n=1), R-ICE (n=10), R-TT (n=4), R-GemOx (n=13), Rituximab monotherapy (n=7), and R-MC (n=1). The first three of these regimens were considered ‘aggressive’ (AG) and the three remaining regimens were considered ‘less aggressive’ (LAG). Results. Median patient age was 59.6 years (range: 31–84 years). The overall response rate (ORR) was 53% (38% complete response [CR]; 15% partial response {PR]. CR directly correlated with IPI score at relapse or therapy failure. ORR was similar in both types of regimen, however the response quality (determined as % CR) was 45% with the LAG regimen and 22% with the AG regimen.With a median follow-up of 29 months the overall survival (OS) was 53% and the event free survival (EFS) was 22%. EFS correlated inversely with IPI at relapse or therapy failure (P=0.015) and directly with response to salvage therapy (P=0.0002). in addition, EFS was slightly higher in patients treated with LAG regimen (42% vs 20%); however this was not statistically significant. Conclusion. Some authors have hypothesised that ORR appears to decrease when patients who had previously received Rituximab + chemotherapy for first-line therapy were treated with Rituximab + chemotherapy as salvage therapy at relapse. However, our data indicate that responses to Rituximab + chemotherapy continue to occur in these patients. In addition, ‘aggressive’ salvage regimens do not achieve better responses. Large, prospective studies are requires in order to verify the findings of this study.


HemaSphere ◽  
2019 ◽  
Vol 3 (S1) ◽  
pp. 962-963
Author(s):  
H. Ngu ◽  
D. Simpson ◽  
M. Hanna ◽  
R. Henderson ◽  
E. Merriman ◽  
...  

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 457-457 ◽  
Author(s):  
Stephen O'Brien ◽  
Leanne Cork ◽  
Valeria Bandeira ◽  
Ruth Bescoby ◽  
Letizia Foroni ◽  
...  

Abstract Objective. SPIRIT 2 is the largest phase 3 prospective randomized open-label trial comparing imatinib (I) 400mg with dasatinib (D) 100mg daily in newly diagnosed chronic phase CML. The primary endpoint was 5 year event-free survival. Methods. 812 (406 in each arm) of 814 patients recruited started study medication (median age 53.2, 275/812 (33.8%) were over 60 years old). Patients were recruited at 144 hospitals between August 2008 and March 2013 and randomized to receive either imatinib 400mg or dasatinib 100mg daily. Secondary endpoints included overall survival, rates of treatment failure, cytogenetic/molecular response - RT-PCR BCR-ABL/ABL ratio of <0.1%IS(major molecular response (MMR), 3 log reduction, MR3) and deeper. To address the potential confounding effect on the primary endpoint of patients switching from randomized treatment to an alternative TKI or other treatment, exploratory per-protocol analyses were performed using the inverse probability of censoring weighting (IPCW) method.Results. All patients have now completed 5 years of follow-up. 424/812 (52.2%) patients completed the study whilst still taking first line medication: 230/406 (56.7%) on dasatinib, 194/406 (47.8%) on imatinib. Of the patients who discontinued first line therapy, more patients on the imatinib arm switched due to suboptimal PCR response (as decided by the local investigator) than on dasatinib (D7/406, 1.7%; I71/406, 17.4%) but more patients on the dasatinib arm discontinued due to intolerance (D123/406, 30.3%; I68/406, 16.7%). More patients went on to transplant in the imatinib arm than in the dasatinib arm (D 6/406, 1.5%; I 30/406 7.6%) and in the imatinib patients undergoing transplant the reason for first line treatment failure was disease progression in 5/30 and suboptimal molecular response in 11/30. Using an intention to treat analysis cumulative incidence of MR3 and MR4 on first line therapy within 5 years was higher in the dasatinib arm than the imatinib arm (MR3: D 83.0%, I 63.0% - difference 20.0%, p<0.0001; MR4: D 77.5%, I 57.2% - difference 20.3%, p<0.0001).At 24 months the complete cytogenetic response rate was D 42.6%, I 31.8% - difference 10.8%, Chi-square test p=0.001.At 5 years the probability of treatment failure-free survival was higher with dasatinib than imatinib(D60.9%, I52.9% - HR: 0.73 (95%-CI:0.59-0.90), p=0.004) but there were no significant differences in event free survival (D91.0%, I89.0% - HR:0.80 (95%-CI:0.51-1.25), p=0.319) or overall survival (D91.9%, I91.2% - HR: 0.90 (95%-CI:0.56-1.47), p=0.690). IPCW modelling results will be presented at the meeting.The overall rate of pleural effusion over 5 years in the dasatinib arm was 36.0% with a higher incidence in older patients. 13 patients developed their first pleural effusion after 3 years on study. Conclusions. In SPIRIT 2 we observed a higher molecular and cytogenetic response rate and also a higher pleural effusion rate with dasatinib but a higher treatment failure rate with imatinib often because investigators were concerned about sub-optimal PCR responses. More imatinib-treated patients proceeded to transplant. There were no statistically significant differences in event free survival (the primary endpoint) or overall survival. Imatinib remains a highly effective first line therapy though subgroup analyses are planned to explore whether dasatinib may have advantages in particular clinical scenarios. Disclosures O'Brien: Bristol Myers Squibb: Research Funding; CTI: Other: Chair of Independent Data Monitoring Committee; National Institute for Health and Care Excellence (NICE): Other: Chair of Technology Appraisal Committee. Osborne:Servier: Honoraria; Pfizer: Honoraria; Takeda: Honoraria; MSD: Honoraria; Roche: Honoraria; Novartis: Honoraria. Bell-Gorrod:Bristol-Myers Squibb: Consultancy; Merck EDM Serono: Consultancy; PharmaMar: Consultancy; Novartis: Consultancy; GlaxoSmithKline: Consultancy. Latimer:Pfizer: Consultancy; BMS: Consultancy; Merck: Consultancy; Astra Zeneca: Consultancy; Bluebirdbio: Consultancy; Janssen: Consultancy. Apperley:Incyte: Honoraria, Speakers Bureau; BMS: Honoraria, Speakers Bureau; Pfizer: Honoraria, Speakers Bureau; Novartis: Honoraria, Research Funding, Speakers Bureau. Byrne:Novartis: Consultancy, Speakers Bureau; BMS: Consultancy, Speakers Bureau. Pocock:Kent & Canterbury Hospital: Employment. Copland:Incyte: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Pfizer: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Novartis: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Bristol-Myers Squibb: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. Clark:Ariad/Incyte: Consultancy; Pfizer: Consultancy, Research Funding; Bristol Myers Squibb: Consultancy, Research Funding; Novartis: Consultancy, Research Funding.


2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S680-S681
Author(s):  
Carly Heck ◽  
Judith Martin ◽  
Marcia Kurs-Lasky

Abstract Background Background: Antibiotic resistance is a major public health concern. A modifiable intervention is outpatient antibiotic stewardship. The goal of this study was to review the electronic health records (EHR) of children diagnosed with community acquired pneumonia (CAP) to compare patients who received non-guideline concordant therapy with those prescribed recommended therapy. Methods Methods: This was a retrospective chart review of 300 children (6 months to 6 years old) with an outpatient diagnosis of CAP between July 2017 and June 2019. 45 Children’s Hospital of Pittsburgh (CHP) and UPMC Children’s Community Pediatrics (CCP) practices were included. CHP practices are academic-based with trainees involved in visits, while CCP practices do not include trainees. First-line recommended therapy was defined as amoxicillin, second-line therapy as azithromycin or amoxicillin-clavulanate, and all other prescriptions were defined as other. Patients prescribed first-line therapy were compared to patients with second-line therapy or other. If first-line therapy was not prescribed, the EHR was manually reviewed for justification. If drug allergy was listed, the medication allergy and type of reaction were recorded. Results Results: In this study the minority of children (43%) were prescribed first-line therapy. This group was younger (57 vs. 63 months of age), more likely to be Non-white (80%), and seen at the CHP locations than those prescribed non-guideline concordant therapy. The average symptom duration was shorter, heart rate and respiratory rate were higher and the presence of fever was more common in the first-line therapy group. Justification for non-guideline therapy was most often reported as to provide coverage for atypical organisms. The most common drug allergy recorded was amoxicillin, and urticaria with unknown timing was the most common type of reaction. Demographics Comparison Results Justification for Second-line / Other Therapy and Drug Allergy Results Conclusion This project observed a high proportion of children being prescribed non-guideline concordant therapy for a diagnosis of CAP. Age, race, practice location, and severity of illness measures showed a statistically significant difference between groups. This study highlights the importance of education which reviews the current guidelines and the most likely pathogens for children with CAP. Disclosures All Authors: No reported disclosures


2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Qiangyun Liu ◽  
Yixuan Zhang ◽  
Miaowen Liu ◽  
Ruoxin Xu ◽  
Fengming Yi ◽  
...  

Abstract Background Although pembrolizumab has shown clinical benefit in patients with small-cell lung cancer (SCLC), its actual efficacy in combination with a conventional chemotherapy drug has not been determined. We performed this study to discern the efficacy and risk of pembrolizumab in combination with chemotherapy as first-line therapy in SCLC patients. Methods We systematically searched the PubMed, ScienceDirect, Cochrane Library, Scopus, Ovid MEDLINE, Embase, Web of Science, and Google Scholar databases for relevant studies. The main outcomes were overall survival (OS) and progression-free survival (PFS). Results We identified 2980 articles and included 6 studies (5 were noncomparative open-label studies and 1 was a randomized controlled trial [RCT]) involving 396 patients in our meta-analysis. The pooled median OS (mOS) was 9.6 months (95% CI, 8.0-11.2), and the pooled median PFS (mPFS) was 4.2 months (95% CI, 2.2-6.1). The 1-year overall survival rate (OSR-1y) and 6-month progression-free survival rate (PFSR-6m) were 45.1% (95% CI, 33-57.2%) and 41.6% (95% CI, 24.3-59%), respectively. The objective response rate (ORR) was 38.8% (95% CI, 11.9-65.67%), disease control rate (DCR) was 69.30% (95% CI, 51.6-87.0%), complete response (CR) was 2.20% (95% CI, 0.8-3.7%), partial response (PR) was 34.70% (95% CI, 7.8-61.5%), and stable disease (SD) was 20.90% (95% CI, 9.1-32.6%). The grade 3-4 adverse effect (AE) rate was 20.88% (95% CI, 1.22-54.85%). The most common AEs were neutropenia (90.16%), anemia (53.21%), dysphagia (41.96%), platelet count decrease (34.87%), and esophagitis (32.89%); severe AEs included neutropenia, respiratory failure, pneumonitis, acute coronary syndrome, and colitis/intestinal ischemia. Conclusions The combination of pembrolizumab with conventional chemotherapy is an effective therapeutic schedule with acceptable and manageable efficacy and toxicity in patients with SCLC. More high-quality and well-designed RCTs with large sample sizes are warranted to further validate our findings.


Author(s):  
Mikifumi Koura ◽  
Masaki Shiota ◽  
Shohei Ueda ◽  
Takashi Matsumoto ◽  
Satoshi Kobayashi ◽  
...  

Abstract Objective This study aimed to reveal the prognostic values of prior local therapy in first-line therapy using androgen receptor-axis targeting agents (abiraterone or enzalutamide) or docetaxel for castration-resistant prostate cancer (CRPC). Methods The study included 303 patients treated with first-line therapy for non-metastatic and metastatic CRPC. The association between prior local therapy and therapeutic outcome including progression-free survival and overall survival was investigated by univariate and multivariate analyses as well as propensity score-matched analysis. Results In univariate analysis, local prior therapy was associated with a lower risk of all-cause mortality (hazard ratio, 0.56, 95% confidence interval, 0.40–0.79; P = 0.0009). Overall survival, but not progression-free survival, was better among patients with prior local therapy compared with patients without prior local therapy even after multivariate analysis and propensity score-matched analysis. Conclusions This study robustly indicated that prior local treatment was prognostic for overall survival among patients with CRPC. This finding is useful to predict patient prognosis in CRPC.


2019 ◽  
Author(s):  
Emily C.L. Wong ◽  
Camilla Tajzler ◽  
Gaurav Vasisth ◽  
Amanda Zhu ◽  
Mathilda Chow ◽  
...  

Abstract Background: Sunitinib and pazopanib are orally-administered tyrosine kinase receptor inhibitors (TKIs) approved as first-line therapy for the treatment of metastatic renal cell carcinoma (mRCC). The IMDC criteria are a predictive prognostic model for patients with mRCC when stratified into three prognosis groups: favourable, intermediate and poor. We retrospectively compared the efficacy and safety of sunitinib and pazopanib as first-line therapy for patients with mRCC in our single institution database. Methods: Retrospective analysis was done to compare progression-free survival (PFS) and side effects of sunitinib and pazopanib as first-line therapy in patients with mRCC. Patients were stratified into prognosis groups according to IMDC criteria. Disease assessment was performed on measurable aspects of disease based on computed tomography or magnetic resonance imaging reports. Survival analysis was performed using the Kaplan-Meier method and Cox regression, with disease progression as the endpoint.Results: Data was obtained from 228 patients with mRCC who were treated with either pazopanib (n=57) or sunitinib (n=171). No significant difference in PFS was found between sunitinib and pazopanib (HR for disease progression or all-cause death, 1.10; 95%CI: 0.76-1.57, p=0.62). Median PFS time for patients receiving sunitinib was 9.4 months and for pazopanib, 8.5 months. Median PFS for patients with intermediate-risk disease was similar between groups (9.4 months vs. 9.2 months, respectively, p=0.93). However, patients treated with sunitinib experienced a greater number of side effects compared to pazopanib. Conclusions: Sunitinib and pazopanib are similarly efficacious as first-line therapy for mRCC. However, adverse events are lower with pazopanib.


BMC Cancer ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Hironaga Satake ◽  
Koji Ando ◽  
Eiji Oki ◽  
Mototsugu Shimokawa ◽  
Akitaka Makiyama ◽  
...  

Abstract Background FOLFOXIRI plus bevacizumab is used as a first-line therapy for patients with unresectable or metastatic colorectal cancer. However, there are no clear recommendations for second-line therapy after FOLFOXIRI plus bevacizumab combination. Here, we describe our planning for the EFFORT study to investigate whether FOLFIRI plus aflibercept has efficacy following FOLFOXIRI plus bevacizumab for mCRC. Methods EFFORT is an open-label, multicenter, single arm phase II study to evaluate whether a FOLFIRI plus aflibercept has efficacy following FOLFOXIRI plus bevacizumab for mCRC. Patients with unresectable or metastatic colorectal cancer who received FOLFOXIRI plus bevacizumab as a first-line therapy will receive aflibercept and FOLFIRI (aflibercept 4 mg/kg, irinotecan 150 mg/m2 IV over 90 min, with levofolinate 200 mg/m2 IV over 2 h, followed by fluorouracil 400 mg/m2 bolus and fluorouracil 2400 mg/m2 continuous infusion over 46 h) every 2 weeks on day 1 of each cycle. The primary endpoint is progression-free survival (PFS). To achieve 80% power to show a significant response benefit with a one-sided alpha level of 0.10, assuming a threshold progression-free survival of 3 months and an expected value of at least 5.4 months, we estimated that 32 patients are necessary. Secondary endpoints include overall survival, overall response rate, safety, and exploratory biomarker analysis for differentiating anti-VEGF drug in 2nd-line chemotherapy for unresectable or metastatic colorectal cancer. Discussion This is the first study to investigate whether FOLFIRI plus aflibercept has efficacy following FOLFOXIRI plus bevacizumab for unresectable or metastatic colorectal cancer. Switching to a different type of anti-VEGF drug in second-line therapy after FOLFOXIRI plus bevacizumab appears to be an attractive treatment strategy when considering survival benefit. It is expected that this phase II study will prove the efficacy of this strategy and that a biomarker for drug selection will be discovered. Trial registration Japan Registry of Clinical Trials jRCTs071190003. Registered April 18, 2019.


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