ClinicalTrials.gg
RecruitingNCT05099471VIWA-1Updated May 5, 2026

Efficacy of Venetoclax in Combination With Rituximab in Waldenström's Macroglobulinemia

A Phase 2 interventional study of Venetoclax; Rituximab and DRC in Waldenstrom Macroglobulinemia and Treatment Naive, sponsored by Christian Buske. Recruiting at 14 sites in 2 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-05-05.

Sponsored by Christian Buske · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Started Mar 2025; still recruiting 1 year 7 months later.
Phase
Phase 2
Study type
Interventional
Enrollment
80
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 75 studies testing rituximab in Waldenstrom Macroglobulinemia — 9 open to participants now, 14 under way, 1 of them phase 3. Rituximab · Waldenstrom Macroglobulinemia.

Planned enrollment
8th of 73
80 · median 32
Started
2025
with 3 others
Phase 2
46 of 75
6 open now
Primary completion
2028-03
later than 10 of 13 live
Registered
69th of 75
by date
Lead sponsor
2 of 75
Christian Buske

Among the 75 studies testing rituximab in Waldenstrom Macroglobulinemia, this one is the 8th largest by planned enrollment of the 73 interventional ones that give a count, is one of 4 that started in 2025, is one of 46 in phase 2, reaches primary completion later than 10 of the 13 other live ones, and was the 69th registered.

Waldenstrom Macroglobulinemia

524 studies on the registry are indexed under Waldenstrom Macroglobulinemia; 62 are open to participants now.

Browse Waldenstrom Macroglobulinemia studies →

Open to participants now

9 of the 75 studies testing rituximab in Waldenstrom Macroglobulinemia are open now, in 6 countries. Recruiting first, the newest first:

3 more — sign in →

By country, each count listing its studies:

All 9 open studies →

About rituximab

Rituximab: first FDA approval 1997 (RITUXAN), first EMA approval 1998. What it is approved for, and how studies give it, is on its page →

Who these studies take

Of the 48 Waldenstrom Macroglobulinemia studies recruiting now, 44 (92%) set no upper age limit and 1 (2%) stop at 75 or younger; 2 take children under 18; 0 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 75 studies testing rituximab in Waldenstrom Macroglobulinemia, or all of them as a file.
02

Study summary

In Waldenström's macroglobulinemia (WM) chemotherapy induces only low CR/VGPR rates and response duration is limited. In addition, WM patients are often elderly, partly not tolerating chemotherapy related toxicities. Thus, innovative approaches are needed which combine excellent activity and tolerability in WM. Chemotherapy-free approaches are highly attractive for this patient group. Based on its high activity and favorable toxicity profile in indolent B-NHL such as CLL, Venetoclax was approved for the treatment of this diseases by the FDA and the European Medicines Agency (EMA). First data in relapsed/refractory WM have documented high activity and low toxicity of Venetoclax also in WM, including patients with prior Ibrutinib treatment or patients carrying CXCR4 mutations. Ibrutinib itself has high activity and a relatively low toxicity profile in WM, but has also major disadvantages: the main disadvantage is the need to apply this drug continuously. Furthermore, Ibrutinib efficacy depends largely on the genotype with a substantial drop in major responses and PFS in the presence of CXCR4 mutations and non-mutated MYD88. In particular the need of continuous treatment for Ibrutinib has prevented that Ibrutinib has become the standard of care outcompeting conventional Rituximab/chemotherapy. This is reflected in current guidelines such as the NCCN and the ESMO guidelines, which still see immunochemotherapy as a backbone of treatment, largely because of the advantage of a timely fixed application. Data in CLL in the relapsed as well as in the first line setting have convincingly shown that in contrast to Ibrutinib Venetoclax is highly efficient also when used in a timely defined application scheme over 12 months in combination with the anti-CD20 antibody Rituximab. Data documented deep responses including molecular responses and a highly significant advantage over immunochemotherapy in large international Phase III trials, changing the standard of care in this disease.

Based on this the hypothesis is that timely fixed application of the combination of Venetoclax and Rituximab induces significantly superior treatment outcomes compared to chemotherapy and Rituximab (DRC) in patients with treatment naïve WM, regardless of the genotype. A first indication for this assumption in the proposed trial will allow the performance of confirmatory phase 3 trials that might change the standard of care in WM.

Read the detailed description

In Waldenström's macroglobulinemia (WM) chemotherapy induces only low CR/VGPR rates and response duration is limited. In addition, WM patients are often elderly, partly not tolerating chemotherapy related toxicities. Thus, innovative approaches are needed which combine excellent activity and tolerability in WM. Chemotherapy-free approaches are highly attractive for this patient group. Based on its high activity and favorable toxicity profile in indolent B-NHL such as CLL, Venetoclax was approved for the treatment of this diseases by the FDA and the European Medicines Agency (EMA). First data in relapsed/refractory WM have documented high activity and low toxicity of Venetoclax also in WM, including patients with prior Ibrutinib treatment or patients carrying CXCR4 mutations. Ibrutinib itself has high activity and a relatively low toxicity profile in WM, but has also major disadvantages: the main disadvantage is the need to apply this drug continuously. Furthermore, Ibrutinib efficacy depends largely on the genotype with a substantial drop in major responses and PFS in the presence of CXCR4 mutations and non-mutated MYD88. In particular the need of continuous treatment for Ibrutinib has prevented that Ibrutinib has become the standard of care outcompeting conventional Rituximab/chemotherapy. This is reflected in current guidelines such as the NCCN and the ESMO guidelines, which still see immunochemotherapy as a backbone of treatment, largely because of the advantage of a timely fixed application. Data in CLL in the relapsed as well as in the first line setting have convincingly shown that in contrast to Ibrutinib Venetoclax is highly efficient also when used in a timely defined application scheme over 12 months in combination with the anti-CD20 antibody Rituximab. Data documented deep responses including molecular responses and a highly significant advantage over immunochemotherapy in large international Phase III trials, changing the standard of care in this disease.

Based on this the hypothesis is that timely fixed application of the combination of Venetoclax and Rituximab induces significantly superior treatment outcomes compared to chemotherapy and Rituximab (DRC) in patients with treatment naïve WM, regardless of the genotype. A first indication for this assumption in the proposed trial will allow the performance of confirmatory phase 3 trials that might change the standard of care in WM.

This study is an International phase II explorative, multicenter, open label, and randomized trial.

The study will consist of an open labeled, stratified 1:1 randomization between Arm A and Arm B for de novo WM patients in need of treatment (phase II). Stratification factors are MYD88 and CXCR4 status (positive vs. negative). A stratified central block randomization will be used. The central randomization service will be used to avoid predictability of the treatment arm.

The primary goal of this study is to explore the efficacy of Venetoclax plus Rituximab versus Dexamethasone/Cyclophosphamide/Rituximab in the treatment of de novo WM patients (Arm A vs. Arm B).

80 patients are planned to be recruited for this study at approcimately 30 sites in Germany, Greece and France.

03

Conditions studied

  • Waldenstrom Macroglobulinemia
  • Treatment Naive

Keywords

  • Hematology
  • Oncology
  • Venetoclax
  • Rituximab
  • DRC
  • Lymphoma
  • NHL
  • indolent
  • monoclonal IgM
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Proven clinicopathological diagnosis of WM as defined by consensus panel one of the Second International Workshop on WM (IWWM). Histopathology has to be perfomed before randomization but within the last 4 months before start of treatment. In addition, pathological specimens have to be sent to the national pathological reference center prior to randomization for the determination of the mutational status of MYD88 and CXCR4 prior to randomization if the mutational status hasn't been determined before. Pathological reference center must confirm the diagnosis of WM.
  • De novo WM independent of the genotype.
  • Patients must have at least one of the following criteria to start study treatment as partly defined by consensus panel criteria from the Seventh IWWM and ESMO Guideline:

    • Recurrent fever, night sweats, weight loss, fatigue (at least one of them).
    • Hyperviscosity.
    • Lymphadenopathy which is either symptomatic or bulky (≥ 5 cm in maximum diameter).
    • Symptomatic hepatomegaly and / or splenomegaly.
    • Symptomatic organomegaly and / or organ or tissue infiltration.
    • Peripheral neuropathy due to WM.
    • Symptomatic cryoglobulinemia.
    • Symptomatic Cold agglutinin anemia.
    • hemolytic anemia and/or thrombocytopenia.
    • Nephropathy related to WM.
    • Amyloidosis related to WM.
    • ≤ 10 g/dL (patients should not have received red blood cells transfusions for at least 7 days prior to obtaining the screening hemoglobin).
    • count \< 100 x 109/L (caused by bone marrow [BM] infiltration of the lymphoma).
    • Serum monoclonal protein > 5 g/dL, even with no overt clinical symptoms.
    • IgM serum concentration ≥ 6 g/dL.
    • and other WM associated relevant symptoms
  • Subject must be ≥ 18 years of age.
  • > 3 months.
  • World Health Organization (WHO) / performance status ≤ 2.
  • ≥ 40% as assessed by transthoracic echocardiogram (TTE).
  • Baseline platelet count ≥ 50x109/L, ≥ 0.75x109/L (if not due to BM infiltration by the lymphoma).

    . Adequate hepatic function per local laboratory reference range as follows:

    • (AST) and alanine transaminase (ALT) \< 3.0 x .
    • ≤1.5 x ULN (unless bilirubin rise is due to Gilbert's syndrome or of non-hepatic origin).
  • Subject must have adequate renal function as demonstrated by a ≥ 30 mL/min; calculated by the Cockcroft Gault formula or measured by 24 hours urine collection.
  • Women of (WCBP), i.e. fertile, following menarche and until becoming must have negative results for pregnancy test and must agree to use a highly effective method of for the duration of the therapy up to 12 months after end of therapy
  • Men must agree not to father a child for the duration of therapy and 12 months after and must agree to advice their female partner to use a highly effective method of birth control. Males must refrain from sperm donation for the duration of treatment and at least 12 months after the last dose of study medication.
  • Each patient must voluntarily date and sign an form in the native language of the patient indicating that he or she understands the purpose of and procedures required for the study and are willing to participate in the study. Patients must be willing and able to adhere to the prohibitions and restrictions specified in this protocol.
  • Affiliation to a social security scheme (relevant for France only).

Exclusion criteria

Exclusion Criteria:

  • Serious medical or psychiatric illness (especially undergoing treatment) likely to interfere with participation in this clinical study.
  • Subject is known to be positive for .
  • Active severe infection
  • Congenital or acquired severe immunodeficiency not attributed to lymphoma (clinical appearance: recurrent infections, necessity of immunoglobulin substitution therapy, patients after transplantation)
  • Evidence of other uncontrolled condition(s) including, but not limited to:

    • Uncontrolled systemic infection (viral, bacterial or fungal).
    • Chronic virus (HBV) or virus (HCV) infection requiring treatment. Note: subjects with serologic evidence of prior vaccination to HBV (i.e. hepatitis B surface (HBs) antigen negative-, anti-HBs antibody positive and anti-hepatitis B core (HBc) antibody negative) or positive anti-HBc antibody from intravenous immunoglobulins (IVIG) may participate
  • inadequate pulmonary function as demonstrated by DLCO ≤ 65% or ≤ 65%.
  • ≥ 30 mL/min to \< 45 ml/min
  • Uncontrolled diabetes mellitus (as indicated by metabolic derangements and / or severe diabetes mellitus related uncontrolled organ complications).
  • Uncontrolled hypertension.
  • Cardiac history of CHF requiring treatment or ≤ 50% or chronic stable angina.
  • Unstable angina pectoris, angioplasty, stenting, or myocardial infarction within 6 months prior to start therapy.
  • Clinically significant cardiac arrhythmia that is symptomatic or requires treatment, or asymptomatic sustained ventricular tachycardia.
  • Subject has a cardiovascular disability status of Class > 2. Class 2 is defined as cardiac disease in which patients are comfortable at rest but ordinary physical activity results in fatigue, palpitations, dyspnea, or anginal pain.
  • History of stroke or intracranial haemorrhage within 6 months prior start of treatment
  • Known pericardial disease.
  • Known interstitial lung disease.
  • Infiltrative pulmonary disease, known pulmonary hypertension.
  • Prior history of unless the subject has been free of the disease for ≥ 3 years. Exceptions include the following:

    • Basal cell carcinoma of the skin,
    • Squamous cell carcinoma of the skin,
    • Carcinoma in situ of the cervix,
    • Carcinoma in situ of the breast,
    • Incidental histologic finding of prostate cancer (TNM stage of T1a or T1b).
  • Known cirrhosis (meeting stage C).
  • Chemotherapy with approved or anticancer therapeutic within 21 days prior to start of therapy
  • therapy within 14 days prior to therapy that exceeds a cumulative dose of 160 mg of dexamethasone or equivalent dose of other corticosteroids given for anti-neoplastic intent.
  • Treatment with any of the following within 7 days prior to the first dose of study drug:

    • moderate or strong cytochrome P450 3A () inhibitors (such as fluconazole, ketoconazole, and clarithromycin).
    • moderate or strong CYP3A inducers (such as rifampin, carbamazepine, phenytoin, St. John's wort).
  • to the active substances or any of the other of the Investigational Medicinal Products as well as to any of the required concomitant drugs or supportive treatments, including to antiviral drugs.
  • Vaccination with within 4 weeks prior to start of therapy.
  • History or evidence of any other clinically significant disorder, condition or disease (with the exception of those outlined above) that, in the opinion of the investigator or sponsor, if consulted, would pose a risk to subject safely or interfere with the study evaluation, procedures or completion.
  • Women who are pregnant as well as women who are breast-feeding and do not consent to discontinue breast-feeding.
  • Participation in another clinical trial within four weeks before start of therapy in this study.
  • No consent for registration, storage and processing of the individual disease-characteristics.
  • Administration or consumption of any of the following within 3 days prior to the first dose of study drug:

    • grapefruit or grapefruit products.
    • Seville oranges (including marmalade containing Seville oranges).
    • star fruit.
  • Person of legal age who is incapable of comprehending the nature, significance and implications of the clinical trial and of determining his/her will in the light of these facts
Terms in these criteria, in plain language(30)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

FEV1

From a breathing test (spirometry): how much air you can blow out in the first second. Often given as a percentage of what is expected for your age, height and sex.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Child-Pugh class

A score of how well the liver works in people with liver disease such as cirrhosis: class A is mild, B moderate and C severe.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

CYP3A (CYP3A4) inhibitors and inducers

CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.

Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Live vaccines

Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
80 participants (estimated)

Study arms

  • Experimental
    Venetoclax / Rituximab

    Cycle 1 (28-days cycle) Stepwise dose escalation of Venetoclax in all patients with a target dose of xy mg/d QD PO. Day 1-7: Venetoclax xy mg/d QD PO Day 8-14: Venetoclax xy mg/d QD PO Day 15-28: Venetoclax xy mg/d QD PO Cycle 2-12: Day 1: Rituximab 375 mg/m2 IV Day 1-28: Venetoclax xy mg/d QD PO

    Drug: Venetoclax; Rituximab

  • Active comparator
    Dexamethasone / Rituximab / Cyclophosphamide

    Cycle 1-6: Day 1: Dexamethasone 20 mg PO Day 1: Rituximab 375 mg/m2 IV Day 1-5: Cyclophosphamide 100 mg/m2 BID PO

    Drug: DRC

Interventions

  • DrugVenetoclax; Rituximab

    Drug pages: Venetoclax · Rituximab

    Combination of venetoclax and rituximab

    Also known as: Venetoclax / Rituximab

  • DrugDRC

    Combination of Dexamethasone / Rituximab / Cyclophosphamide

    Also known as: Dexamethasone / Rituximab / Cyclophosphamide

06

What researchers measure

Primary outcomes

  1. Rate of CR / VGPR

    CR / VGPR 12 months after randomization

    Time frame: 12 months

Secondary outcomes

  1. Interim reponse

    response at C4D1; C7D1 (arm A) / 28 days after C6D1 (arm B); C10D1 (arm A) / post treatment staging 1 (arm B) (categories: CR, VGPR, PR, MR, SD, PD, death)

    Time frame: 12 months

  2. Response rate

    response rates (CR, VGPR, PR, MR, SD, PD, death)

    Time frame: 12 months

  3. Best response

    Best response is determined in the time interval from start of treatment up to 24 months (categories: CR, VGPR, PR, MR, SD, PD, death).

    Time frame: 24 months

  4. Time to first overall response

    Time to first overall response is defined as the time from randomization to first overall response (MR, PR, VGPR or CR) within 24 months from start of treatment.

    Time frame: 24 months

  5. Time to first major response

    Time to first major response is defined as the time from randomization to first major response the patient achieves (CR, VGPR, PR) within 24 months from start of treatment.

    Time frame: 24 months

  6. Event free survival (EFS)

    EFS is defined as the date of randomization to the first event of death from any cause or progression or stop of treatment due to toxicity or add-on of new anti-cancer therapy.

    Time frame: 12 months

  7. Response duration (RD)

    Remission duration will be calculated in patients with overall response (CR, VGPR, PR, MR) from the first date of response to the date of progression, relapse or death from any cause.

    Time frame: 12 months

  8. Progression Free Survival (PFS)

    PFS will be calculated from the date of randomization to the following events: the date of progression and the date of death if it occurred earlier.

    Time frame: 6 years

  9. Lymphoma specific survival (LSS)

    Lymphoma specific survival is defined as the period from randomization to death from lymphoma or lymphoma related cause (e.g. infections, bleeding, amyloid caused organ failure).

    Time frame: 6 years

  10. Overall survival (OS)

    Overall survival is defined as the period from randomization to death from any cause. Patients who have not died until the time of the analysis will be censored at their last contact date.

    Time frame: 6 years

  11. Safety of participants including number of adverse events according to NCI-CTCAE v5.0, SAEs, laboratory parameters, ECG and vital signs.

    Adverse events according to NCI-CTCAE version 5.0, SAEs, laboratory parameters (hematology, serum chemistry, b2-microglobulin, coagulation, urine analysis, quantitative immunoglobulins, serum free light chain, cold agglutinin test, serum protein electrophoresis, serum immunofixation, Anti-HIV, HBV, HCV), 12-lead ECG (including PR-, QT- and QTc interval), vital signs (heart rate, blood pressure and temperature)

    Time frame: 12 months

  12. Quality of life assessed by FACT-Lym questionnaire

    Quality of Life will be assessed by the FACT-Lym questionnaire which is a scoring instrument to measure the management of chronic illness in lymphoma patients. A higher score indicates a better quality of life

    Time frame: 12 months

  13. Comparison of response rates between CXCR4 mutated and CXCR4 wildtype patients

    Response rates of CXCR4 mutated and CXCR4 wildtype patients will be compared.

    Time frame: 12 months

07

Study locations

12 of 14 sites recruiting
08

References and documents

Publications

  • Buske C, Dimopoulos MA, Morel P. Reply to S. Sarosiek et al. J Clin Oncol. 2023 Aug 20;41(24):4060-4061. doi: 10.1200/JCO.23.00877. Epub 2023 Jun 22. No abstract available. PubMed 37348018 ↗

Individual participant data

Plan to share: Undecided

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Mar 2025 (actual). Primary completion is estimated for Mar 2028, 36 months after the start.

Of 55 non-industry phase 2 interventional studies under Waldenstrom Macroglobulinemia, half reached primary completion within 67 months of starting (the median), counting those still running; a quarter within 45 and three quarters within 103. This study's planned 36 months is below that.

Counting every sponsor, half of 66 studies reached it within 64 months; a quarter within 45 and three quarters within 103.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 4, 2021
First posted
Oct 29, 2021
StartActual
Mar 21, 2025
Primary completionEst.
Mar 2028
CompletionEst.
Mar 2033
Last update
May 5, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 5, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05099471
Lead sponsor
Christian Buske
Responsible party
Christian Buske (Prof. Dr., University of Ulm) — Sponsor-investigator
First posted
Oct 29, 2021
Start date
Mar 21, 2025
Primary completion
Mar 2028 (estimated)
Completion
Mar 2033 (estimated)
Last update
May 5, 2026

Study contacts

Dajana Kaszynski, MSc
Contact
studien.gla@uniklinik-ulm.de
+49 731 500 ext. 65833
Christian Buske, Prof. Dr.
principal investigator · University Hospital Ulm Department of Internal Medicine III

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
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Studies of the drugs tested here: Venetoclax · Rituximab

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