Thalidomide and Rituximab in Waldenstrom's Macroglobulinemia
Phase II Study of Thalidomide and Rituximab in Waldenstrom's Macroglobulinemia
  • Phase

    Phase 2
  • Study Type

  • Study Participants

The purpose of this study is to determine the percentage of people who can attain remission and the length of time such responses to therapy are sustained, as well as the side effects that might result from rituximab and thalidomide in people with lymphoplasmacytic lymphoma.
Patients will receive thalidomide(200mg) orally once daily for two weeks. If after two weeks of thalidomide, the patient is doing well the dose of thalidomide will increase (400mg) and they will remain on it for up to 50 additional weeks. The length of time a patient is on thalidomide will depend upon how they are responding to therapy.
During the second week of the study patients will also begin receiving rituximab intravenously once weekly for 4 weeks, which may then be repeated 8 weeks later depending upon the response.
A determination of how the patient is responding will be made based on testing conducted at 12 weeks. This testing includes blood tests and possibly a bone marrow biopsy. If it is determined that the disease is not progressing, patients will begin a second phase of treatment which includes 4 additional weekly infusions of rituximab and the continuation of oral thalidomide.
If it is determined at the 12-week evaluation, or at any time thereafter, that the disease has progressed (by studying serum immunoglobulin M (IgM) levels, bone marrow involvement, tumor cells, and/or development of new signs and symptoms) then the patient will be removed from the study.
Periodic examinations and tests will be done to determine how the patient is doing, what response and side effects (if any) the patient may be having from the study drugs. If patient is responding to therapy then they will remain on this study and followed for a period of two years.
Bone marrow biopsies and aspirations will be obtained at 3-6 month intervals extending for 2 years following the last treatment.
Study Started
May 31
Primary Completion
Feb 29
Study Completion
Feb 29
Results Posted
Jun 02
Last Update
Jun 02

Drug Thalidomide

200mg orally once a day for 14 weeks if that dosage is tolerated well, it will be increased to 400mg for up to 50 weeks.

  • Other names: Thalomid

Drug Rituximab

Given intravenously once weekly for 4 weeks beginning the second week of study treatment. If tolerated well, this may be repeated 8 weeks later.

  • Other names: Rituxan

Thalidomide and Rituximab Experimental

Thalidomide 200mg orally once a day for 14 weeks if that dosage is tolerated well, it will be increased to 400mg for up to 50 weeks Rituximab Given intravenously once weekly for 4 weeks beginning the second week of study treatment. If tolerated well, this may be repeated 8 weeks later.


Inclusion Criteria:

Clinicopathological diagnosis of Waldenstrom's macroglobulinemia requiring therapy
Baseline staging requirements
Absolute Neutrophil Count > 500/microliter (uL)
Platelet Count > 25,000/uL
Serum creatinine < 2.5mg/dL
Total bilirubin and transaminase (SGOT) < 2.5 X Upper Limit of Normal (ULN)
Greater than 18 years of age
Life expectancy of 3 months or greater
Eastern Cooperative Oncology Group (ECOG) status performance of 0-2

Exclusion Criteria:

Chemotherapy, steroid therapy, or radiation therapy within 30 days of study entry
Pregnant or lactating women
Serious co-morbid disease
Uncontrolled bacterial, fungal or viral infection
Active second malignancy


All WM Patients

All Events

Event Type Organ System Event Term All WM Patients

Objective Response Rate

Response determinations were made using modified consensus panel criteria from the Third International Workshop on WM, and response rates were determined on an evaluable basis. A complete response was defined as having resolution of all symptoms, normalization of serum IgM levels with complete disappearance of IgM paraprotein by immunofixation, and resolution of any adenopathy or splenomegaly. Patients achieving a partial response and a minor response were defined as achieving a more than or equal to 50% and more than or equal to 25% reduction in serum IgM levels, respectively. Patients with stable disease were defined as having less than 25% change in serum IgM levels, in the absence of new or increasing adenopathy or splenomegaly and/or other progressive signs or symptoms of WM. Progressive disease was defined as a greater than 25% increase in serum IgM level occurred from the lowest attained response value or progression of clinically significant disease-related symptom(s).

All WM Patients

Complete Response


Minor Response


Partial Response


Stable Disease


Time to Progression

Time to disease progression (TTP) was calculated from the start of therapy using the Kaplan-Meier method.

Thalidomide and Rituximab

TTP for all evaluable patients

months (Median)
Full Range: 1.0 to 49.1

TTP for previously treated patients

months (Median)
Full Range: 1.0 to 45.8

TTP for previously untreated patients

months (Median)
Full Range: 2.5 to 49.1

TTP for responding patients

months (Median)
Full Range: 10.3 to 49.1

To Identify the Mechanism(s) of Action for Combined Thalidomide and Rituximab Activity.

Outcome Measure Data Not Reported

Age, Continuous

years (Mean)
Standard Deviation: 11.2

Age, Categorical

Region of Enrollment

Sex: Female, Male

Overall Study

All WM Patients