Comparing two treatments for untreated Splenic Marginal Zone Lymphoma
Official title: Phase 3, Interventional, Multicentre, Open-label, Randomized Study Comparing Rituximab Plus Zanubrutinib to Rituximab Monotherapy in Previously Untreated, Symptomatic Splenic Marginal Zone Lymphoma (RITZ)
Run by International Extranodal Lymphoma Study Group (IELSG) · NCT05735834 · Data updated 2026-05-14
This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.
This study is testing whether a combination of two drugs, rituximab and zanubrutinib, works better than just rituximab alone for people with untreated Splenic Marginal Zone Lymphoma.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 120 (estimated) |
| Sponsor | International Extranodal Lymphoma Study Group (IELSG) Academic / other |
| Drugs / interventions | prednisone, rituximab, zanubrutinib |
| Locations | 55 sites (Vienna and 54 other locations) |
| Trial ID | NCT05735834 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are adults aged 18 and older with a confirmed diagnosis of untreated Splenic Marginal Zone Lymphoma.
✕Probably not a fit
Patients with prior treatments for SMZL or those with certain genetic mutations may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial aims to evaluate the effectiveness and tolerability of a combination therapy using rituximab and zanubrutinib compared to rituximab alone in patients with untreated Splenic Marginal Zone Lymphoma (SMZL). Participants will be randomly assigned to one of two treatment groups for a maximum of two years, followed by a three-year follow-up period. The study will assess progression-free survival and monitor any adverse effects associated with the treatments. Approximately 120 subjects will be enrolled in this multicenter, open-label Phase III trial.
Why it matters
Potential benefit: If successful, this study could provide a more effective treatment option for patients with untreated SMZL, potentially improving their progression-free survival.
How similar studies have gone: Other studies have shown promising results with combination therapies in similar conditions, indicating potential for success in this approach.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Ability to understand and willingness to sign a written informed consent in accordance with ICH/GCP regulations before registration and prior to any trial-specific procedures. * Confirmed diagnosis of SMZL, including Matutes immunophenotype score \<3. Evaluation of the following features is desirable: absence of CD103 expression by flow cytometry, absence of Cyclin D1, BCL6, and CD10 expression by immunohistochemistry, and absence of the MYD88 L265P mutation. Patients with prominent splenomegaly and involvement of the splenic hilar and/or extra hilar lymph nodes are eligible * Previously untreated disease. Patients with prior hepatitis C virus (HCV) infection who underwent HCV eradication and have persistent SMZL after 3 months post-eradication can be included. * Treatment needs according to the ESMO guideline criteria * Measurable lesions * Age ≥ 18 years. * European Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2. * Absolute neutrophil count (ANC) ≥ 1.0 x 109/L, platelet count ≥ 50 x 109/L, Hb \> 7.5 g/dl. Values below such thresholds are allowed if attributable to the underlying lymphoma. Transfusions are allowed if clinically indicated during screening. * Adequate hepatic and renal function and coagulation parameters * Patient able and willing to swallow trial drugs as whole tablet/capsule Exclusion Criteria: * Previous splenectomy. * Any systemic therapy for SMZL. * Patients with central nervous system (CNS) involvement. * Prior malignancy (other than the disease under study) within the past 2 years, except for curatively treated basal or squamous skin cancer, superficial bladder cancer, carcinoma in situ of the cervix or breast, or localized Gleason score ≤ 6 prostate cancer. * Clinically significant cardiovascular disease * History of cerebrovascular accident or intracranial hemorrhage within 6 months before registration and known bleeding disorders (eg, von Willebrand's disease or hemophilia). * History of confirmed progressive multifocal leukoencephalopathy (PML). * Concomitant diseases that require anticoagulant therapy with warfarin or phenprocoumon or other vitamin K antagonists and patients treated with dual anti-platelet therapy. Patients being treated with factor Xa inhibitors (eg, rivaroxaban, apixaban, edoxaban), direct thrombin inhibitors (e. dabigatran) low molecular weight heparin (LMWH), or single anti-platelet agents (eg. aspirin, clopidogrel) can be included but must be properly informed about the potential risk of bleeding. * Malabsorption syndrome or other condition that precludes the enteral route of administration. * Any uncontrolled active systemic infection requiring intravenous antimicrobial treatment. * Known human immunodeficiency virus (HIV) infection. * Active COronaVIrus Disease 19 (COVID-19) infection or non-compliance with the prevailing hygiene measures regarding the COVID-19 pandemic. * Active chronic hepatitis C or hepatitis B virus infection * Active, uncontrolled autoimmune phenomenon (autoimmune hemolytic anemia or immune. thrombocytopenia) requiring steroid therapy with \> 20 mg daily of prednisone dose or equivalent. * Known hypersensitivity to trial drugs or any component of the trial drugs. * Concomitant treatment with strong CYP3A inducers or inhibitors * Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that in the opinion of the investigator may increase the risk associated with trial participation or investigational product administration or may interfere with the interpretation of trial results and/or would make the patient inappropriate for enrolment into this trial. * Pregnancy or breastfeeding. * Concurrent participation in another therapeutic clinical trial.
Where it's running
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Medical University of Vienna
Vienna, Austria Recruiting -
Institut Bergonié
Bordeaux, France Recruiting -
CHU de Grenoble
Grenoble, France Recruiting -
Hôpital Saint Louis
Paris, France Recruiting -
Hôpital Lyon-Sud
Pierre-Bénite, France Recruiting -
CHRU Nancy Brabois
Vandœuvre-lès-Nancy, France Recruiting
Show 44 more locations
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IRCCS Istituto Tumori Giovanni Paolo II
Bari, Italy Recruiting -
IRCCS AOU di Bologna
Bologna, Italy Recruiting -
ASST Spedali Civili di Brescia
Brescia, Italy Recruiting -
A.O.U. Policlinico G. Rodolico-S. Marco
Catania, Italy Recruiting -
IRCCS IRST Istituto Romagnolo per lo Studio dei Tumori "Dino Amadori"
Meldola, Italy Recruiting -
Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico
Milan, Italy Recruiting -
IRCCS Ospedale San Raffaele
Milan, Italy Recruiting -
ASST Grande Ospedale Metropolitano Niguarda
Milan, Italy Recruiting -
Azienda Ospedaliero Universitaria Maggiore della Carità
Novara, Italy Recruiting -
Azienda Ospedaliera Ospedali Riuniti Villa Sofia Cervello
Palermo, Italy Recruiting -
IRCCS Policlinico San Matteo
Pavia, Italy Recruiting -
Ospedale Santa Maria delle Croci
Ravenna, Italy Recruiting -
USL-IRCCS of Reggio Emilia, Arcispedale Santa Maria Nuova
Reggio Emilia, Italy Recruiting -
Ospedale di Circolo e Fondazione Macchi - ASST dei Sette Laghi
Varese, Italy Recruiting -
Oslo University Hospital
Oslo, Norway Recruiting -
Hospedal Clinic de Barcelona
Barcelona, Spain Recruiting -
Hospital del Mar
Barcelona, Spain Recruiting -
Istitut Català d'Oncologia, Hospital Duran i Reynals
Barcelona, Spain Recruiting -
Hospital Universitario Cruces
Bilbao, Spain Recruiting -
Hospital Virgen Arrixaca
El Palmar, Spain Recruiting -
Clinica Universidad de Navarra
Madrid, Spain Recruiting -
Hospital 12 De Octubre
Madrid, Spain Recruiting -
Hospital Gregorio Marañón
Madrid, Spain Recruiting -
Hospital Ramon y Cajal
Madrid, Spain Recruiting -
Clinica Universidad de Navarra
Pamplona, Spain Recruiting -
Hospital De Salamanca
Salamanca, Spain Recruiting -
Hospital De Donostia
San Sebastián, Spain Recruiting -
Hospital Clinico De Valencia
Valencia, Spain Recruiting -
Hospital Universitario Miguel Servet
Zaragoza, Spain Recruiting -
Oncology Institute of Southern Switzerland
Bellinzona, Switzerland Recruiting -
INSELSPITAL, Bern University Hospital
Bern, Switzerland Recruiting -
University Hospitals Dorset
Bournemouth, United Kingdom Recruiting -
Hospital Beatson West of Scotland Cancer Centre
Glasgow, United Kingdom Recruiting -
Leicester Royal Infirmary
Leicester, United Kingdom Recruiting -
University College London Hospitals
London, United Kingdom Recruiting -
Guy's Hospital - Guy's and St. Thomas' NHS Foundation Trust
London, United Kingdom Recruiting -
The Christie
Manchester, United Kingdom Recruiting -
Churchill Hospital
Oxford, United Kingdom Recruiting -
Derriford Hospital
Plymouth, United Kingdom Recruiting -
Aarhus University Hospital
Aarhus, Denmark Not yet recruiting -
Policlinico Santa Maria alle Scotte
Siena, Italy Not yet recruiting -
St Olavs Hospital
Trondheim, Norway Not yet recruiting -
Hospital Vall d'Hebron
Barcelona, Spain Not yet recruiting -
Karolinska University Hospital
Stockholm, Sweden Not yet recruiting
+5 more sites. See ClinicalTrials.gov for the full list.
Study contacts
- Study coordinator: Emanuele Zucca, MD
- Email: ielsg@ior.usi.ch
- Phone: +41 58 666
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Polatuzumab vedotin with Zanubrutinib, Rituximab, Cyclophosphamide, Doxorubicin, and Prednisone in untreated DLBCL (MCD/BN2/N1)
This study tests a targeted combination therapy to see if it can treat previously untreated DLBCL with specific molecular subtypes.
-
Nemtabrutinib plus rituximab for marginal zone lymphoma
This phase 2 trial tests whether combining nemtabrutinib with rituximab can help people with marginal zone lymphoma.
-
Zanubrutinib, rituximab, lenalidomide plus tislelizumab for relapsed/refractory follicular lymphoma
This trial tests whether adding the PD‑1 blocker tislelizumab to zanubrutinib, rituximab, and lenalidomide helps adults with relapsed or refractory follicular lymphoma who have had at least two prior therapies.
-
Zanubrutinib plus rituximab for secondary HLH linked to B‑cell lymphoma
This test tries zanubrutinib together with rituximab (plus short steroids and ruxolitinib, with emapalumab if needed) to treat people who have secondary HLH caused by B‑cell lymphoma.
-
Zanubrutinib plus rituximab as first-line treatment for marginal zone lymphoma
This tests whether combining zanubrutinib and rituximab is effective and safe as first-line treatment for people with CD20-positive marginal zone lymphoma who have not received prior systemic therapy.
-
ZR-MTX combo for newly diagnosed primary intraocular lymphoma
This trial tests a Rituximab, Zanubrutinib, and methotrexate cocktail plus intravitreal methotrexate in people newly diagnosed with primary intraocular lymphoma to see if it can extend the time before the disease progresses.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.