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Study of Iodine 131 Anti B1 Antibody for 1st or 2nd Relapsed Indolent B-Cell Lymphomas or B-Cell Lymphomas That Have Transformed to a More Aggressive Histology

Phase II Study of Iodine 131 Anti B1 Antibody for 1st or 2nd Relapsed Indolent B-Cell Lymphomas or B-Cell Lymphomas That Have Transformed to a More Aggressive Histology

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00950755
Enrollment
41
Registered
2009-08-03
Start date
1998-06-30
Completion date
2011-04-30
Last updated
2017-01-18

For informational purposes only โ€” not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Lymphoma, Non-Hodgkin

Brief summary

This is a single-arm, open-label study of Iodine 131 Anti B1 Antibody for the treatment of 1st or 2nd relapsed indolent B cell lymphomas or B cell lymphomas that have transformed to a more aggressive histology. The primary endpoint of the study is to determine the response rate. Secondary endpoints of the study is to determine the duration of response, time to progression, time-to-treatment failure, safety, and survival. Forty patients will receive therapy on this study at the 2 clinical sites. Patients will undergo 2 phases of the study. In the first phase, termed the dosimetric dose, patients will receive an infusion of unlabeled Anti B1 Antibody (450 mg) over 70 minutes (including a 10 minute flush) immediately followed by a 30 minute infusion (including a 10 minute flush) of Anti B1 Antibody (35 mg) which has been trace-labeled with 5 mCi of Iodine 131. Whole body gamma camera scans will be obtained on 1) Day 0; 2) Day 2, 3, or 4; and 3) Day 6 or 7 following the dosimetric dose. Using the dosimetric data from the 3 imaging timepoints, a patient-specific dose of Iodine 131 Anti B1 Antibody to deliver the desired total body dose of radiotherapy will be calculated. In the second phase, termed the radioimmunotherapeutic dose, patients will receive a 70 minute infusion (including a 10 minute flush) of unlabeled Anti B1 Antibody (450 mg) immediately followed by a 30 minute infusion (including a 10 minute flush) of 35 mg Anti B1 Antibody labeled with the patient-specific dose of Iodine 131 to deliver a whole body dose of 75 cGy to patients with no hematologic risk factors. Patients who have platelet counts of 100,001-149,999 cells/mm3 will receive 65 cGy and patients who are obese will be dosed based upon 137% of their lean body mass (see Appendix A). Patients will be treated with either saturated solution potassium iodide (SSKI), Lugol's solution, or potassium iodide tablets starting at least 24 hours prior to the first infusion of the Iodine 131 Anti B1 Antibody and continuing for 14 days following the last infusion of Iodine 131 Anti B1 Antibody (i.e., therapeutic dose).

Interventions

BIOLOGICALtositumomab and Iodine I 131 tositumomab (anti-B1 antibody)

For the treatment of 1st or 2nd relapsed indolent B cell lymphomas or B cell lymphomas that have transformed to a more aggressive histology

Sponsors

GlaxoSmithKline
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Patients must have a histologically-confirmed diagnosis of B-cell CLL/PLL/SLL; lymphoplasmacytic - immunocytoma; follicle center, follicular, grade I; or follicle center, follicular, grade II NHLs or one of these B-cell lymphomas which has transformed to a more aggressive histology (37). * Patients must have evidence that their tumor tissue expresses the CD20 antigen. Immunoperoxidase stains of paraffin-embedded tissue showing positive reactivity with L26 antibody or immunoperoxidase stains of frozen tissue showing positive reactivity with Anti B1 Antibody (\>50% of tumor cells are positive) or evidence of CD20 positivity by flow cytometry (\>50% of tumor cells are positive) are acceptable evidence of CD20 positivity. Testing of tumor tissue from any time in the course of the patient's disease is acceptable. * Patients must have received 1 or 2 prior chemotherapy regimens and have progressed following their last regimen. Patients who have received \>2 prior chemotherapy regimens are excluded. Prior therapy with radiation, immunosuppressants, or steroids are not counted as chemotherapy regimens. * Patients must have a performance status of at least 60% on the Karnofsky Scale (see Appendix B) and an anticipated survival of at least 3 months. * Patients must have an absolute granulocyte count \>1,500 x 109/l and a platelet count \>100,000 x 109/l within 14 days of study entry. These blood counts must be sustained without support of hematopoietic cytokines or transfusion of blood products. * Patients must have adequate renal function (defined as serum creatinine \<1.5 upper limit of normal) and hepatic function (defined as total bilirubin \<1.5 upper limit of normal and hepatic transaminases \[AST + ALT\] \<5 x upper limit of normal) within 14 days of study entry. * Patients must have bi-dimensionally measurable disease. At least one lesion must be \>/=2cm x 2 cm (by CT scan). * Patients must be at least 18 years of age. * Patients must give written informed consent and sign an EC-approved informed consent form prior to study entry.

Exclusion criteria

* Patients with more than an average of 25% of the intratrabecular marrow space involved by lymphoma in bone marrow biopsy specimens as assessed microscopically within 42 days of study entry. Bilateral posterior iliac crest core biopsies are required if the percentage of intratrabecular space involved exceeds 10% on a unilateral biopsy. The mean of bilateral biopsies must be no more than 25%. The procedure for bilateral bone marrow biopsy analysis of marrow involvement is included in Appendix C. * Patients who have received cytotoxic chemotherapy, radiation therapy, or cytokine treatment within 4 weeks prior to study entry (6 weeks for nitrosourea compounds) or who exhibit persistent clinical evidence of toxicity. The use of systemic steroids must be discontinued one week prior to study entry. * Patients with prior hematopoietic stem cell transplant following high-dose chemotherapy or chemo/radiotherapy. * Patients with active obstructive hydronephrosis. * Patients with evidence of active infection requiring IV antibiotics at the time of study entry. * Patients with New York Heart Association class III or IV heart disease (see Appendix D) or other serious illness that would preclude evaluation. * Patients with prior malignancy other than lymphoma, except for adequately-treated skin cancer, in situ cervical cancer, or other cancer for which the patient has been disease-free for 5 years. Patients who have been disease-free of another cancer for greater than 5 years must be carefully assessed at the time of study entry to rule out recurrent disease. * Patients with known HIV infection. * Patients with known brain or leptomeningeal metastases. * Patients who are pregnant or breast-feeding. Patients of child-bearing potential must undergo a serum pregnancy test within 7 days prior to study entry and radiolabeled antibody is not to be administered until a negative result is obtained. Males and females must agree to use effective contraception for 6 months following treatment. * Patients with previous allergic reactions to iodine. This does not include reacting to IV iodine-containing contrast materials. * Patients who were previously given any monoclonal or polyclonal antibodies of any non-human species for either diagnostic or therapeutic purposes. This includes engineered chimeric and humanized antibodies. * Patients who previously received radioimmunotherapy. * Patients with progressive disease within 1 year of irradiation arising in a field that has been previously irradiated with \>3500 cGy. * Patients who are concurrently receiving either approved or non-approved (through another protocol) anti-cancer drugs or biologics. * Patients who have received more than 2 prior chemotherapy regimens. Prior therapy with radiation, immunosuppressants, or steroids are not counted as chemotherapy regimens.

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants (Par.) With Response as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Par. with response include those with Complete Response (CR: complete resolution of all disease-related radiological abnormalities and the disappearance of all signs and symptoms related to the disease), Clinical Complete Response (CCR: complete resolution of all disease-related symptoms; residual foci, thought to be residual scar tissue, are present), or Partial Response (PR: \>=50% reduction in the sum of the products of the longest perpendicular diameters of all measurable lesions; no new lesions).
Number of Participants With Confirmed Response as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. Par. with confirmed response include those with Complete Response (CR: complete resolution of all disease-related radiological abnormalities and the disappearance of all signs and symptoms related to the disease), Clinical Complete Response (CCR: complete resolution of all disease-related symptoms; residual foci, thought to be residual scar tissue, are present), or Partial Response (PR: \>=50% reduction in the sum of the products of the longest perpendicular diameters of all measurable lesions; no new lesions).
Number of Participants With Confirmed Complete Response (CR) as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. CR is defined as the complete resolution of all disease-related radiological abnormalities and the disappearance of all signs and symptoms related to the disease.
Number of Participants With Confirmed Complete Response Plus Clinical Complete Response (CR + CCR) as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Responses had to be confirmed by 2 separate evaluations occurring \>4 weeks apart. CCR is defined as the complete resolution of all disease-related symptoms; residual foci, thought to be residual scar tissue, are present. Generally, an unchanging lesion =\<2 centimeters (cm) in diameter by radiographic evaluation or =\<1 cm in diameter by physical examination can be considered scar tissue. The extent of disease (EOD) must be unchanged or decreased upon follow-up evaluations. If the EOD was unchanged or if further decreases occurred for \>=6 months, the participant was reclassified as having a CR.
Number of Participants With Confirmed Partial Response (PR) as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. Confirmed PR is defined as a \>=50% reduction in the sum of the products of the longest perpendicular diameters of all measurable lesions, with no new lesions.

Secondary

MeasureTime frameDescription
Number of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.An SAE is any event occurring at any dose that results in any of the following: death, a life-threatening adverse drug experience (ADE; at immediate risk of death from the experience as it occurred), inpatient hospitalization/prolongation of existing hospitalization, a persistent/significant disability/incapacity, or a congenital anomaly/birth defect. Medical events that may not result in death, be life-threatening, or require hospitalization may be considered to be a serious ADEs when based upon appropriate medical judgment. Relatedness was based on the Investigator's medical judgement.
Number of Participants With the Indicated Type of InfectionPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.An infection is the colonization of a host organism by a parasite species. Infecting parasites seek to use the host's resources to reproduce, often resulting in disease. Specimen samples of the body fluid are cultured for testing whether the infectious organism is present and grown in the culture media to assess the growth pattern of the organisms present in the specimen. The culture results could be positive or negative. The positive culture results indicate that the tested participant has the infection under investigation, in which case therapeutic treatment with anti-infective is required.
Number of Participants With an Infection for Which Anti-infectives Were AdministeredPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Anti-infectives are capable of acting against infection, by inhibiting the spread of an infectious agent or by killing the infectious agent outright. Anti-infective is a general term that encompasses antibacterials, antibiotics, antifungals, antiprotozoans, and antivirals.
Duration of the Indicated Grade 3 or Grade 4 Hematologic ToxicitiesPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Adverse events were graded using the Common Toxicity Criteria from the Cancer Therapy Evaluation Program, Division of Cancer Therapy, National Cancer Institute. Grades: 0 = No adverse event or within normal limits; 1 = Mild adverse event; 2 = Moderate adverse event; 3 = Severe and undesirable adverse event; 4 = Life-threatening or disabling adverse event; 5 = Death related to adverse event.
Time to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Nadir is defined as the lowest laboratory value recorded following the administration of the study medication. Time to recovery to baseline in hematologic laboratory evaluations is the time required for recovery from nadir values to baseline values.
Duration of Response for All Confirmed Responders (CR, CCR, or PR) as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. Duration of response is defined as the time from the first documented response until disease progression. Disease progression is defined as a \>=25% increase from the nadir value of the sum of the products of the longest perpendicular diameters of all measurable lesions or the appearance of any new lesion. Individual lesions must be \>2 cm in diameter by radiographic evaluation or \>1 cm in diameter by physical examination.
Nadir Values for Hemoglobin, a Hematologic ParameterPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Nadir is defined as the lowest laboratory value recorded following the administration of study medication. Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells.
Number of Participants Who Became Positive or Negative for Human Anti-murine Antibody (HAMA) After Study TreatmentPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Tositumomab is a murine (mouse) antibody. Participants in this study were evaluated to determine if they developed a human anti-murine antibody (HAMA) immune response after administration of tositumomab and iodine I 131 tositumomab.
Time to HAMA Positivity From First Dosimetric DosePar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Time to HAMA positivity is defined as the time from the first dosimetric dose to the first reported HAMA-positive result for the participant.
Number of Participants in the Indicated Categories of Thyroid Function AssessmentPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Hypothyroidism, a condition in which the thyroid gland does not produce enough thyroid hormone (resulting in the elevation of thyroid stimulating hormone \[TSH\] in the blood), may result from treatment with radioactive iodine I 131. A thyroid blockade medication was given prior to administration of the study drug and up to 2 weeks after the therapeutic dose to prevent the uptake of I 131 in the thyroid gland. Thyroid function was determined periodically, including during follow-up, in order to assess if there was any effect of the I 131 on thyroid function, such as hypothyroidism.
Number of Days Each Participant Took to Reach Hypothyroidism After the First Dosimetric DosePar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormone (resulting in the elevation of thyroid stimulating hormone \[TSH\] in the blood).
Nadir Values for Hematologic Parameters ANC, Platelets, and WBC CountPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Nadir is defined as the lowest laboratory value recorded following the administration of study medication. ANC is a measure of the number of neutrophil granulocytes present in the blood. Neutrophils are a type of WBC that fights against infection. Platelets and WBCs are types of blood cells.
Time to Progression of Disease or Death as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Time to progression or progression-free survival is defined as the time from the dosimetric dose to the first documented occurrence of disease progression or death. Disease progression is defined as a \>=25% increase from the nadir value of the sum of the products of the longest perpendicular diameters of all measurable lesions or the appearance of any new lesion. New lesions must be greater than 2 x 2 centimeters (cm) in diameter by radiographic evaluation or greater than 1 cm in diameter by physical examination.
Time to Treatment Failure as Assessed by the InvestigatorPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Time to treatment failure is defined as the length of time from the date of enrollment to the first incidence of treatment withdrawal, study removal, progression, and/or alternative therapy for the participant's lymphoma, or death.
Overall SurvivalPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.Overall survival is defined as the time from the treatment start date to the date of death from any cause.
Number of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsPar. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.An AE is any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. The Investigator assessed whether the AE was possibly or probably related to study drug. In addition, all laboratory-derived hematologic toxicities were assumed to be possibly or probably related to study drug.

Participant flow

Pre-assignment details

Participants (par.) received radioimmunotherapy of tositumomab (TST) and Iodine I 131 TST in 2 phases (Ph.): Ph. 1, dosimetric dose; Ph. 2, therapeutic dose. Par. were evaluated until disease progression, they died, or they were on study for 2 years. Par. completing 2 years of study could enter a long-term follow-up study (BEX104528; NCT00240578).

Participants by arm

ArmCount
TST and Iodine I 131 TST
Participants received a dosimetric dose (DD) consisting of 450 milligrams (mg) of tositumomab (TST) intravenously (IV) followed by 5.0 millicurie (mCi) of Iodine I 131 and 35 mg of TST IV. The therapeutic dose (TD) consisting of 450 mg of TST IV, followed by a participant-specific dose of I 131 (75 centigray \[cGy\] or 65 cGy) and 35 mg of TST IV, was administered 7-14 days after the DD. Participants who had disease progression or had completed at least 2 years of follow-up after administration of TST/I 131 TST during the TD phase and had signed the informed consent to participate in the Long-Term Follow-Up (LTFU) study (BEX104528) were followed for up to 10 years. Participants did not receive any study medication during the LTFU study.
41
Total41

Withdrawals & dropouts

PeriodReasonFG000
Dosimetric and Therapeutic TreatmentDeath1
Dosimetric and Therapeutic TreatmentInvestigator Discretion1
Dosimetric and Therapeutic TreatmentLost to Follow-up3
Dosimetric and Therapeutic TreatmentParticipant Moved; Unable to Follow Up1
Dosimetric and Therapeutic TreatmentProgressive Disease27
Dosimetric and Therapeutic TreatmentReceived Alternative Therapy1
Dosimetric and Therapeutic TreatmentRolled Over to Study BEX1045286
Dosimetric and Therapeutic TreatmentStroke; Difficult to Attend Study Visits1
Long-Term Follow-UpDeath8
Long-Term Follow-UpLost to Follow-up1

Baseline characteristics

CharacteristicTST and Iodine I 131 TST
Age, Continuous58.2 Years
STANDARD_DEVIATION 11.4
Gender
Female
21 Participants
Gender
Male
20 Participants
Race/Ethnicity, Customized
White
41 participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
โ€” / โ€”
other
Total, other adverse events
40 / 41
serious
Total, serious adverse events
13 / 41

Outcome results

Primary

Number of Participants (Par.) With Response as Assessed by the Investigator

Par. with response include those with Complete Response (CR: complete resolution of all disease-related radiological abnormalities and the disappearance of all signs and symptoms related to the disease), Clinical Complete Response (CCR: complete resolution of all disease-related symptoms; residual foci, thought to be residual scar tissue, are present), or Partial Response (PR: \>=50% reduction in the sum of the products of the longest perpendicular diameters of all measurable lesions; no new lesions).

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: Intent-to-Treat (ITT) Exposed Population: all participants who were enrolled into the study and received at least one dose of study drug. Only those participants evaluable for response were analyzed.

ArmMeasureValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants (Par.) With Response as Assessed by the Investigator31 participants
95% CI: [62, 89]
Primary

Number of Participants With Confirmed Complete Response (CR) as Assessed by the Investigator

Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. CR is defined as the complete resolution of all disease-related radiological abnormalities and the disappearance of all signs and symptoms related to the disease.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants evaluable for confirmed response were analyzed.

ArmMeasureValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With Confirmed Complete Response (CR) as Assessed by the Investigator14 participants
95% CI: [20, 49]
Primary

Number of Participants With Confirmed Complete Response Plus Clinical Complete Response (CR + CCR) as Assessed by the Investigator

Responses had to be confirmed by 2 separate evaluations occurring \>4 weeks apart. CCR is defined as the complete resolution of all disease-related symptoms; residual foci, thought to be residual scar tissue, are present. Generally, an unchanging lesion =\<2 centimeters (cm) in diameter by radiographic evaluation or =\<1 cm in diameter by physical examination can be considered scar tissue. The extent of disease (EOD) must be unchanged or decreased upon follow-up evaluations. If the EOD was unchanged or if further decreases occurred for \>=6 months, the participant was reclassified as having a CR.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants evaluable for CR + CCR were analyzed.

ArmMeasureValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With Confirmed Complete Response Plus Clinical Complete Response (CR + CCR) as Assessed by the Investigator17 participants
95% CI: [26, 57]
Primary

Number of Participants With Confirmed Partial Response (PR) as Assessed by the Investigator

Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. Confirmed PR is defined as a \>=50% reduction in the sum of the products of the longest perpendicular diameters of all measurable lesions, with no new lesions.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants evaluable for confirmed PR were analyzed.

ArmMeasureValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With Confirmed Partial Response (PR) as Assessed by the Investigator4 participants
95% CI: [1, 19]
Primary

Number of Participants With Confirmed Response as Assessed by the Investigator

Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. Par. with confirmed response include those with Complete Response (CR: complete resolution of all disease-related radiological abnormalities and the disappearance of all signs and symptoms related to the disease), Clinical Complete Response (CCR: complete resolution of all disease-related symptoms; residual foci, thought to be residual scar tissue, are present), or Partial Response (PR: \>=50% reduction in the sum of the products of the longest perpendicular diameters of all measurable lesions; no new lesions).

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants evaluable for confirmed response were analyzed.

ArmMeasureValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With Confirmed Response as Assessed by the Investigator22 participants
95% CI: [38, 69]
Secondary

Duration of Response for All Confirmed Responders (CR, CCR, or PR) as Assessed by the Investigator

Responses had to be confirmed by 2 separate evaluations occurring \>=4 weeks apart. Duration of response is defined as the time from the first documented response until disease progression. Disease progression is defined as a \>=25% increase from the nadir value of the sum of the products of the longest perpendicular diameters of all measurable lesions or the appearance of any new lesion. Individual lesions must be \>2 cm in diameter by radiographic evaluation or \>1 cm in diameter by physical examination.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants with confirmed response and those who experienced progressive disease were analyzed.

ArmMeasureValue (MEDIAN)
TST and Iodine I 131 TSTDuration of Response for All Confirmed Responders (CR, CCR, or PR) as Assessed by the Investigator46.4 months
Secondary

Duration of the Indicated Grade 3 or Grade 4 Hematologic Toxicities

Adverse events were graded using the Common Toxicity Criteria from the Cancer Therapy Evaluation Program, Division of Cancer Therapy, National Cancer Institute. Grades: 0 = No adverse event or within normal limits; 1 = Mild adverse event; 2 = Moderate adverse event; 3 = Severe and undesirable adverse event; 4 = Life-threatening or disabling adverse event; 5 = Death related to adverse event.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. The n in the category titles reflects the number of participants with the indicated Grade 3 or Grade 4 hematologic toxicity.

ArmMeasureGroupValue (MEDIAN)
TST and Iodine I 131 TSTDuration of the Indicated Grade 3 or Grade 4 Hematologic ToxicitiesANC, n=1816 days
TST and Iodine I 131 TSTDuration of the Indicated Grade 3 or Grade 4 Hematologic ToxicitiesHemoglobin, n=325 days
TST and Iodine I 131 TSTDuration of the Indicated Grade 3 or Grade 4 Hematologic ToxicitiesPlatelets, n=1528 days
TST and Iodine I 131 TSTDuration of the Indicated Grade 3 or Grade 4 Hematologic ToxicitiesWBC count, n=1423 days
Secondary

Nadir Values for Hematologic Parameters ANC, Platelets, and WBC Count

Nadir is defined as the lowest laboratory value recorded following the administration of study medication. ANC is a measure of the number of neutrophil granulocytes present in the blood. Neutrophils are a type of WBC that fights against infection. Platelets and WBCs are types of blood cells.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants with hematologic toxicity were evaluated. Hematologic toxicity is defined as laboratory values outside the normal range (different for each parameter).

ArmMeasureGroupValue (MEDIAN)
TST and Iodine I 131 TSTNadir Values for Hematologic Parameters ANC, Platelets, and WBC CountANC1.2 1000 cells/millimeters cubed (mm^3)
TST and Iodine I 131 TSTNadir Values for Hematologic Parameters ANC, Platelets, and WBC CountPlatelets78 1000 cells/millimeters cubed (mm^3)
TST and Iodine I 131 TSTNadir Values for Hematologic Parameters ANC, Platelets, and WBC CountWBC count2.3 1000 cells/millimeters cubed (mm^3)
Secondary

Nadir Values for Hemoglobin, a Hematologic Parameter

Nadir is defined as the lowest laboratory value recorded following the administration of study medication. Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants with hematologic toxicity were evaluated. Hematologic toxicity is defined as laboratory values outside the normal range (different for each parameter).

ArmMeasureValue (MEDIAN)
TST and Iodine I 131 TSTNadir Values for Hemoglobin, a Hematologic Parameter11.3 g/dL
Secondary

Number of Days Each Participant Took to Reach Hypothyroidism After the First Dosimetric Dose

Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormone (resulting in the elevation of thyroid stimulating hormone \[TSH\] in the blood).

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Participants experiencing hypothyroidism were analyzed.

ArmMeasureGroupValue (NUMBER)
TST and Iodine I 131 TSTNumber of Days Each Participant Took to Reach Hypothyroidism After the First Dosimetric DoseParticipant Number 19/73192 days
TST and Iodine I 131 TSTNumber of Days Each Participant Took to Reach Hypothyroidism After the First Dosimetric DoseParticipant Number 18/68475 days
TST and Iodine I 131 TSTNumber of Days Each Participant Took to Reach Hypothyroidism After the First Dosimetric DoseParticipant Number 19/57671 days
Secondary

Number of Participants in the Indicated Categories of Thyroid Function Assessment

Hypothyroidism, a condition in which the thyroid gland does not produce enough thyroid hormone (resulting in the elevation of thyroid stimulating hormone \[TSH\] in the blood), may result from treatment with radioactive iodine I 131. A thyroid blockade medication was given prior to administration of the study drug and up to 2 weeks after the therapeutic dose to prevent the uptake of I 131 in the thyroid gland. Thyroid function was determined periodically, including during follow-up, in order to assess if there was any effect of the I 131 on thyroid function, such as hypothyroidism.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Participants who were evaluable for thyroid function assessment and who had no elevated TSH level or hypothyroidism at baseline were analyzed.

ArmMeasureGroupValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants in the Indicated Categories of Thyroid Function AssessmentElevated TSH post therapy9 participants
TST and Iodine I 131 TSTNumber of Participants in the Indicated Categories of Thyroid Function AssessmentHypothyroidism3 participants
Secondary

Number of Participants Who Became Positive or Negative for Human Anti-murine Antibody (HAMA) After Study Treatment

Tositumomab is a murine (mouse) antibody. Participants in this study were evaluated to determine if they developed a human anti-murine antibody (HAMA) immune response after administration of tositumomab and iodine I 131 tositumomab.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population

ArmMeasureGroupValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants Who Became Positive or Negative for Human Anti-murine Antibody (HAMA) After Study TreatmentPositive4 participants
TST and Iodine I 131 TSTNumber of Participants Who Became Positive or Negative for Human Anti-murine Antibody (HAMA) After Study TreatmentNegative37 participants
Secondary

Number of Participants With an Infection for Which Anti-infectives Were Administered

Anti-infectives are capable of acting against infection, by inhibiting the spread of an infectious agent or by killing the infectious agent outright. Anti-infective is a general term that encompasses antibacterials, antibiotics, antifungals, antiprotozoans, and antivirals.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants who had infection during the study and during the follow-up period were analyzed.

ArmMeasureGroupValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With an Infection for Which Anti-infectives Were AdministeredAnti-infective Not Administered3 participants
TST and Iodine I 131 TSTNumber of Participants With an Infection for Which Anti-infectives Were AdministeredAnti-infective Administered18 participants
Secondary

Number of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of Participants

An AE is any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. The Investigator assessed whether the AE was possibly or probably related to study drug. In addition, all laboratory-derived hematologic toxicities were assumed to be possibly or probably related to study drug.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population

ArmMeasureGroupValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsAbsolute Neutrophil Count (ANC) <1000 cells/cm^318 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsWhite Blood Cells (WBC) <2000 cells/cm^314 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsPlatelets <50000 cells/cm^315 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsHemoglobin <8.0 grams/deciliter (g/dL)3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsNausea12 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsConstipation3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsVomiting3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsDiarrhea2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsLethargy6 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsHeadache4 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsParaesthesia3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsSomnolence3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsThrombocytopenia11 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsAnemia7 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsNeutropenia2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsPancytopenia2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsFatigue6 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsPyrexia6 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsChills5 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsPain3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsHerpes Zoster3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsLower Respiratory Tract Infection3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsPneumonia3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsUpper Respiratory Tract Infection3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsNeutropenic Sepsis2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsRespiratory Tract Infection2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsRhinitis2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsCough4 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsOropharyngeal Pain4 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsDyspnea3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsSneezing2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsBack pain2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsMuscle Spasms2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsMyalgia2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsRash4 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsContusion2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsFall2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsHypothyroidism4 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsDecreased Appetite3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsMyelodysplastic Syndrome3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Adverse Events (AE) Possibly or Probably Related to Study Drug and Experienced by at Least 5% of ParticipantsOrthostatic Hypotension2 participants
Secondary

Number of Participants With the Indicated Serious Adverse Events (SAE) Related to Study Drug

An SAE is any event occurring at any dose that results in any of the following: death, a life-threatening adverse drug experience (ADE; at immediate risk of death from the experience as it occurred), inpatient hospitalization/prolongation of existing hospitalization, a persistent/significant disability/incapacity, or a congenital anomaly/birth defect. Medical events that may not result in death, be life-threatening, or require hospitalization may be considered to be a serious ADEs when based upon appropriate medical judgment. Relatedness was based on the Investigator's medical judgement.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. All participants who experienced any SAE were analyzed.

ArmMeasureGroupValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugAnemia6 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugThrombocytopenia6 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugPancytopenia2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugFebrile Neutropenia1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugNeutropenia1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugLower Respiratory Tract Infection2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugPneumonia2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugHemophilus Infection1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugHerpes Simplex1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugHerpes Zoster1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugNeutropenic Sepsis1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugRespiratory Tract Infection1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugMyelodysplastic Syndrome3 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugPyrexia2 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugHematuria1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugRenal Failure Chronic1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugHepatic Failure1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugHypercalcemia1 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Serious Adverse Events (SAE) Related to Study DrugRadiculitis Brachial1 participants
Secondary

Number of Participants With the Indicated Type of Infection

An infection is the colonization of a host organism by a parasite species. Infecting parasites seek to use the host's resources to reproduce, often resulting in disease. Specimen samples of the body fluid are cultured for testing whether the infectious organism is present and grown in the culture media to assess the growth pattern of the organisms present in the specimen. The culture results could be positive or negative. The positive culture results indicate that the tested participant has the infection under investigation, in which case therapeutic treatment with anti-infective is required.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population

ArmMeasureGroupValue (NUMBER)
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionMeningitis; n=210 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionPyelonephritis; n=210 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionAny Infection; n=4121 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionNo Infection; n=4120 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionSepsis; n=213 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionPneumonia; n=211 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionEndocarditis/Pericarditis; n=210 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionPeritonitis; n=210 participants
TST and Iodine I 131 TSTNumber of Participants With the Indicated Type of InfectionOther Infections; n=2120 participants
Secondary

Overall Survival

Overall survival is defined as the time from the treatment start date to the date of death from any cause.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: Only those participants who died during the study and during the follow-up period were analyzed.

ArmMeasureValue (MEDIAN)
TST and Iodine I 131 TSTOverall Survival74.5 months
Secondary

Time to HAMA Positivity From First Dosimetric Dose

Time to HAMA positivity is defined as the time from the first dosimetric dose to the first reported HAMA-positive result for the participant.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Participants who converted to HAMA positivity were analyzed.

ArmMeasureValue (MEDIAN)
TST and Iodine I 131 TSTTime to HAMA Positivity From First Dosimetric Dose112 days
Secondary

Time to Nadir and Time to Recovery to Baseline in Hematologic Laboratory Evaluations

Nadir is defined as the lowest laboratory value recorded following the administration of the study medication. Time to recovery to baseline in hematologic laboratory evaluations is the time required for recovery from nadir values to baseline values.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants with hematologic toxicity were evaluated for time to nadir and time to recovery to baseline. Hematologic toxicity is defined as laboratory values outside the normal range (different for each parameter).

ArmMeasureGroupValue (MEDIAN)
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to nadir ANC, n=4042.5 days
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to nadir hemoglobin, n=4047 days
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to nadir platelets, n=4032 days
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to nadir WBC count, n=4042.5 days
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to recovery to baseline ANC, n=3561 days
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to recovery to baseline hemoglobin, n=3061 days
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to recovery to baseline platelets, n=3549 days
TST and Iodine I 131 TSTTime to Nadir and Time to Recovery to Baseline in Hematologic Laboratory EvaluationsTime to recovery to baseline WBC count, n=3485 days
Secondary

Time to Progression of Disease or Death as Assessed by the Investigator

Time to progression or progression-free survival is defined as the time from the dosimetric dose to the first documented occurrence of disease progression or death. Disease progression is defined as a \>=25% increase from the nadir value of the sum of the products of the longest perpendicular diameters of all measurable lesions or the appearance of any new lesion. New lesions must be greater than 2 x 2 centimeters (cm) in diameter by radiographic evaluation or greater than 1 cm in diameter by physical examination.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants who experienced progression were evaluated.

ArmMeasureValue (MEDIAN)
TST and Iodine I 131 TSTTime to Progression of Disease or Death as Assessed by the Investigator12.6 months
Secondary

Time to Treatment Failure as Assessed by the Investigator

Time to treatment failure is defined as the length of time from the date of enrollment to the first incidence of treatment withdrawal, study removal, progression, and/or alternative therapy for the participant's lymphoma, or death.

Time frame: Par. were evaluated until death/disease progression or 2 years in Study BEX104505. Par. who completed 2 years in BEX104505 were followed in study BEX104528 for up to 125 months. Data are included from both Study BEX104505 and Study BEX104528.

Population: ITT Exposed Population. Only those participants who experienced treatment failure were evaluated.

ArmMeasureValue (MEDIAN)
TST and Iodine I 131 TSTTime to Treatment Failure as Assessed by the Investigator9.5 months

Source: ClinicalTrials.gov ยท Data processed: Feb 4, 2026